Adduser

How to install the adduser tool in Linux? To install the Adduser tool, use the following commands, depending on your Linux distribution. 1. Add a new user This command adds a new user to your Linux system. It will ask you for some details and after entering these details a new user account will be created. 2. To add a user with a different shell.

Can you add a system user to adduser?

If you look at the man page documentation for these utilities, you will find that you can use adduser to add a regular or system user. A group of options, adduser adds a regular user. add a system user. It is important that you first know the difference between the two.

How does the adduser and addgroup commands work?

On Unix-like operating systems, the adduser command creates a new user and the addgroup command creates a new group. The adduser command can also be used to add an existing user to an existing group. adduser and addgroup add users and groups to/from the system based on command line parameters and configuration information.

What can I do with adduser in Debian?

These are better interfaces to low-level tools like Useradd, Groupadd, and Usermod programs that pick UID and GID values ​​as Debian default policy values, create a home directory with a basic configuration, run their own script, and so on.. adduser and addgroup can operate in one of five modes:.

How does the adduser command work in Linux?

On the Linux operating system, the adduser command is used to create or add a user to a Linux server. There are several ways to add users to the Linux environment, for example: B. useradd, adduser. The Linux ecosystem supports multiple users. Therefore, it is more important to ensure proper monitoring and control at user and group level.

How to add a new user in Linux?

It is similar to the Linux useradd command. The adduser command is much more interactive than the useradd command. Use the following commands to install the adduser tool, depending on your Linux distribution. 1. Add a new user This command adds a new user to your Linux system.

How to add or create Sudo user in Linux system?

Sudo will be installed automatically. After installation you must first create a new user. It is convenient to use the useradd operation. To add an existing sudo user, start from this step. You can set a user password with the passwd tool. Now add the newly created user to the rider group. Use the Usermod tool.

How do I add a user to my computer?

Start your terminal application. Run the adduser command with the username as argument. If necessary, enter the password for the current user. The current user must have administrator rights on the system. adduser adds a user with other details.

How to install the adduser tool in linux windows 10

The adduser command in Linux is used to add a new user to your current Linux computer. This command changes the settings of the created user. It is similar to the Linux useradd command. The adduser command is much more interactive than the useradd command.

Is there a way to install Windows on Linux?

There are several ways to install and run Windows software on Linux, including Wine compatibility level (which isn't ideal) and installing Windows on a virtual machine (which is time-consuming). Use Linux software if possible.

How to add a user to a different directory?

4. To add a user from another personal phonebook. This command adds a new user with /home/manav as the default directory. 5. Get the version of the adduser command. This command displays the version information for the adduser command. 6. How to display the help area for the adduser command?

How to install the adduser tool in linux browser

To install the adduser command, use: pacman S yogurt yogurt S adduser Note that yogurt is outdated. Now you can add users with adduser.

How can I install Sudo on my computer?

Install sudo. You must first make sure that the sudo and /etc/sudoers-sudo configuration files are available. To do this, run: $ which sudo or $ sudo V The first command should show the location of the sudo binary executable, and the second program should show the version number of the sudo command.

How to add user to Windows Subsystem for Linux ( WSL )?

1. Open the WSL distribution (eg Ubuntu) to which you want to add the user. 2. Type the following command into the WSL distribution console (for example, Ubuntu) and press Enter. In the above command, replace the actual username (such as brink2) that you want for the new user.

Can a Windows 10 user be a Linux user?

Not only are Linux user accounts independent of the distribution, they are also independent of your user account in Windows 10. When you add a user to the WSL distribution, by default this new user is not a member of the sudo group (also called administrator). ). ).

What is the adduser and addgroup commands in Linux?

Linux commands adduser and addgroup. On Unix-like operating systems, the adduser command creates a new user and the addgroup command creates a new group. The adduser command can also be used to add an existing user to an existing group.

Where can I get software to install on Linux?

Using third-party repositories - Anyone can create their own software repositories, package the software and distribute it from there. Sometimes you may want to use a third-party repository to install software that you just can't get from your Linux distribution's repositories.

What kind of tool does SUSE Linux use to install software?

SUSE uses RPM as its own package format, but has its own high-level tool for installing system software. SUSE Linux uses a tool called yast (which stands for another installation tool) to perform all kinds of system administration tasks, including software installation.

Is there an adduser command in Arch Linux?

There is no adduser command in Arch Linux. As you can see from the wiki, Arch uses useradd. And you don't need to install anything because it's part of the repository:.

How to add a user to a system?

What should I do to add a user to the system without using useradd/adduser? The only option that comes to mind is to add an entry for the user in /etc/passwdfile. Add an entry for the group to /etc/groupfile. Create the added user's home directory. Set a new password for the user with the passwd command.

What's the difference between adduser and useradd in Linux?

Adduser is not a standard Linux command. This is essentially a Perl script that uses the useradd command behind the scenes. This high-level utility is more efficient to successfully create new users on Linux. The default settings for all new users can also be set using the adduser command.

Can you add a system user to add user to computer

First, open Settings by pressing Win + I on your keyboard and then click or tap Accounts. In the left column, click or tap the Family and others tab. On the right side of the Other users section, click the + button next to the Add someone to this computer option.

How do you make a new computer user?

• Choose Start > Settings > Accounts, then choose Family & Others. (In some editions of Windows, you'll see Other users.)
• Select Add someone to this computer.
• Select I don't have this person's credentials and on the next page, select Add a user without a Microsoft account.

How do I add an user to my laptop?

Select Control Panel in the right column of the field that appears. Double-click User Accounts with a two-person icon above it. Under Select a task., select Create a new account.

How can I add an user for my computer?

• Go to Settings. You can open it from the start menu.
• Click Accounts.
• In the left pane, click Family and others.

How do you set up a new user?

1. Click on your username in the top right corner of the toolbar. 2. Select "User Management" from the drop-down menu. 3. Click the New User button. The "New User" window opens, where you can enter information about the new user.

How to create an user guide?

• Write directly to the user. If possible, start each step with a verb.
• Use numbered lists.
• Name the different steps.
• Use visual aids.
• Things to keep in mind when writing a guide
• Resources to help you write your guide.

How to write an useful user guide?

• Objective group. : This section should clearly indicate who the target audience is.
• Functional representation of the system.
• Assignment of system roles and tasks: The tasks that each user can perform are defined in the system.
• Explain how the system will be used. A good way to describe the system is to use screenshots.

What is the purpose of an user guide?

A user guide, also known as a user guide, is a technical document with a very specific purpose: to help non-experts identify and solve problems without the help of an expert.

What does User Guide stand for?

Click here for the possible meanings and translations of the word user manual. A user manual or user manual, also known as manual, is a technical communication document designed to assist users of a specific system.

Can you add a system user to add user to windows 10

To add a new user (with a Microsoft account) on a Windows 10 PC, do the following: Click Start, type add user, and select the first result: Add, change, or remove other users. In the "Other users" section, select "Add others to this PC". If you already have a Microsoft account, enter the corresponding email address.

How do I create an admin user?

Open the start menu. Click Settings to open the Windows 10 installer, click Accounts. In the left pane, click Family and others. In the Other People section of the right pane, find and click the default user account that you want to set up as an administrator.

How do you add another user to your computer?

To add another user, do the following: Go to the Charms bar, click the Settings icon, and then click the words Change PC Settings. On the PC Settings screen, click the Users category. To add a new user account, click on the words "Add User" and then in the "Add User" window that appears, select the type of account you want to create.

How do you add a new user?

To add a new user account, go to Settings > Accounts > Family & other people and select Add another person to this PC. Unfortunately, it is not always possible to create a new user account. Sometimes the new account doesn't show up or you can't access it.

Can you add a system user to add user to laptop

Click "Start", type "add user" and select the first result: "Add, change or remove other users". In the "Other users" section, select "Add others to this PC". If you already have a Microsoft account, enter the corresponding email address.

How do I create a new user on my PC?

To create a new user account, press the Windows key + I on your keyboard to open Settings. Now go to Accounts > Family & Others. Click Add someone to this computer. You will now be prompted to enter the new user's email address or phone number. You will now be prompted to create a new Microsoft account for the new user.

How do I set up another user?

1) Open Control Panel. 2) Select "User Account" and click on "User Account". 3) Then select "Manage another account". 4) In the PC settings, click on Add new user. Sends it to family members and other users. 5) You now have the option to add another person to this computer on the right-hand side.

How do I remove an user from my laptop?

• Click on the Windows icon in the lower left corner of your screen and locate the Settings app.
• If you see the Settings app in the search results, click the Settings app to open it. Open the Windows Settings app.
• Click Accounts.
• In the menu bar on the left side of the preferences window, click Family & others.

Can you add a system user to add user password

Here are some steps to create or add a new user account to the system.
Step 1 : Click "Win Key" in window 8 to open the home page, and you can also swipe to the right edge of the screen, the "Settings" tab, then click "Change PC Settings", it will open all configuration pages.
Step 2 Now go to PC Settings and click on Accounts.

Is there a command to add a new user?

Windows provides the network user command for this. This command works in Windows 2000, Windows XP/2003, Vista and Windows 7. Example: To add a new user account with John login and password fadf24as If the password should not be visible when adding a new user account, you can enter '*' as shown below.

How can I add multiple users to my computer?

Open the Settings app on your device. Click Advanced System Multiple Users. If you can't find these settings, search for users in the Settings app. Tap Add user OK. If you don't see Add User, click Add User or Profile User OK. If you don't see any options, your device can't add users.

How can I add a user without a Microsoft account?

Hold and click or tap the "Add a user without a Microsoft account" link, then click Next. You can then enter a username of your choice in the Who will use this computer section? Enter and confirm a password to protect your account.

How to add password to local user account?

Method 1: Add a password to the local user account using the system settings. Windows includes many features to protect the system from outside intruders, here they will use the system password settings to add the password protection feature to your local user account.
Step 1 .Go to the "Start" button and click on it.
Step 2 .

How to set a user password in Windows 10?

Set a password for a user account in Windows 10.1
Step 1 : Open PC settings. 2
Step 2 : Click Users and Accounts. 3
Step 3 : Select the connection parameters and click the "Add" button under the "Password". Room
Step 4 : Enter a new password, re-enter it, enter a password hint, and click Next. 5
Step 5 : Select Done.

Can you add a system user to add user to linux

1. How to add a new user in Linux. To add/create a new user, all you need to do is run the command "useradd" or "adduser" with the "username". Username is the login name that the user uses to log into the system. Only one user can be added and this username must be unique (unlike any other username that already exists on the system).

How do I create an user on Linux?

Creating a user in Linux On Linux, you must use the command line to create a user, but you can use multiple commands. The useradd command is the basis for each of the Linux methods used to add a user. You can also add a user to a group when you create a user on Linux.

How do I add users in Linux?

How to add a user to Linux. Follow these steps to add an existing user to a group on Linux: 1. Log in as root. 2. Use the username command useradd (for example, useradd roman). 3. Use su and the username of the newly added user to login.

What is the command to create users in Linux?

A. Use the useradd command to create a new user account on a Linux distribution. The system administrator is responsible for creating the account. Log in as root (or use the sudo command).

How do I create a Linux User Account?

Steps to create a user account in Ubuntu Linux. Open a terminal application. Login to the remote box by running the user ssh@yourubuntuboxip. To add a new user to Ubuntu, run sudo adduser userNameHere. Enter the password and other information needed to create a user account on the Ubuntu server.

Can you add a system user to add user to excel

Here I will show you VBA code to quickly insert Windows username into Excel cell range. 1. Press Alt + F11 to activate the Microsoft Visual Basic for Applications window, click Insert > Module, copy and paste it below the VBA code into the Module window. VBA: Enter the username.

How to work with multiple users on an Excel worksheet?

On the Browse tab, click the Share Book button to get this form. Check the option Allow multiple users to make changes at the same time. You can also combine books with it. And click OK. Excel will ask if you can continue.

How can I share an Excel file with another user?

First, open the Excel file by double clicking on the file. Then go to the Review tab on the Excel ribbon and click the Share Workbook button. If the user is doing this for the first time, they may receive this message from the Trust Center in the privacy settings of the document.

Are there any add-ins that I can use in Excel?

Some add-ins are easily accessible in Excel, but are hidden in Excel by default. Some of the main plugins are Solver, Data Analysis (Analysis Toolkit), VBA Analysis Toolkit. If the add-ins are already listed in your Excel, you will see all those add-ins in the Data tab.

How to add a new user to a group?

Use the gid or ingroup options to add a new system user to an existing group. Use the group option to add a new system user to a new group with the same ID. A personal directory is created according to the same rules as for normal users.

How to create a new group in Linux?

The addgroup command is much more interactive than the groupadd command. Use the following commands to install the addgroup tool, depending on your Linux distribution. 1. Add a new group This command creates a new group for your Linux computer.

How does the adduser and addgroup commands work in linux

Linux adduser and addgroup commands Updated: 16/8/2021 by Computer Hope On operating systems such as Unix, the adduser command creates a new user and the addgroup command creates a new group. The adduser command can also be used to add an existing user to an existing group.

How do I add users to a group in Linux?

Add a user to a group on Linux. To add only one user to the group, use the following command: 1. sudo adduser username grouptoadd. This will add your username: username to the group to add the group. This is basically the best method when you want to add a user to a group.

How to manage users with groups in Linux?

Managing groups and users in Linux Create new groups. Creating new groups is not something many users do, as most Linux distributions don't need them. Delete groups. If you do not benefit from a specific group on your Linux PC, it is recommended that you remove it. Add/remove users to groups. To add existing users to the newly created group, you must use the usermod command. User management.

How do I add an user in Linux?

Adding a User in Linux On Linux, you must use the command line to create a user, but you can use multiple commands. The useradd command is the basis for each of the Linux methods used to add a user. You can also add a user to a group when you create a user on Linux.

How to list groups in Linux?

• 2 ways to list all groups in Linux. The /etc/group file contains all the local groups.
• List of all groups on Linux.
• Put all group names in alphabetical order.
• The number of all Linux groups.
• List of all user groups.
• Group list for current user.
• List of user groups with group ID.
• List of all users in the group.
• Conclusion.
• References.

How to add a new user to a group in Linux?

If you want to have a specific UID, you can specify it with the uid option. By default, system users belong to the nogroup group. Use the gid or ingroup options to add a new system user to an existing group. Use the group option to add a new system user to a new group with the same ID.

How do you add a user in adduser?

When called with an argument that is not a parameter and with no system or group parameters, adduser adds a normal user. adduser chooses the first available UID in the range specified for regular users in the configuration file. The UID can be replaced with the uid option.

What are the defaults for adduser and delgroup in Linux?

The / file contains the default values ​​for the adduser, addgroup, deluser, and delgroup programs. Each line contains a few values ​​in the format option = value. Single or double quotes are allowed around the value, as are spaces around the equals sign. Comment lines must contain a pound sign (#) in the first column.

What do you do with the adduser command?

Adduser will ask you to assign a password for the user and will ask for additional credentials such as full name and phone number. A home directory (default / home / mynewuser) and a user group mynewuser are created for the new user.

How to assign a user to a group?

If needed, you can force adduser and addgroup to assign custom user and group IDs when creating a user or group. This can be done using the parameters uid and gid. DNI of the identity card. Let the new user ID be the specified number. adder does not work. if the identification has already been taken.

How to install the addgroup tool in Linux?

Use the following commands to install the addgroup tool, depending on your Linux distribution. 1. Add a new group This command creates a new group for your Linux computer. 2. Add a new group with the specified group ID This command adds a new group with the specified group ID. 3. How do you create a group with a specific look?

How to add a user to a group in Linux?

Adding a user or group is quite easy, you just need to pass the name of the new user (or group) to the command. For example, it goes without saying that you must be root or have elevated privileges for this process to work.

How to create a user in Debian Linux using adduser?

Use the adduser command followed by the username to create a new user with the default options. After you run the adduser command, you will be prompted to set a password for the new user. Default user information is defined in /. The new user's home directory is created in the /home directory.

How to verify a Sudo user in Debian?

To check if a new Debian sudo user has been added to the group, run the command: the output lists all users in the group. To make sure the new user has sudo rights: 1. Switch to the user account you just created by running the following command (replace the username with your username):.

How to add a new user to a group in Debian?

By default, system users belong to the nogroup group. Use the gid or ingroup options to add a new system user to an existing group. Use the group option to add a new system user to a new group with the same ID. A personal directory is created according to the same rules as for normal users.

How to create a root user in Debian?

Before you can add a user to your system, login to your server as the root user - replace ip_address with your server's IP address. Create a new user as root using the adduser command. Add your desired user account name to the command:.

What can i do with adduser in debian 10

The first way to add users to Debian 10 is to use the adduser command. The adduser command is very similar to the useradd command. However, it provides a more interactive way to add users to the Debian host. In general, it's better to use adduser instead of useradd (as recommended by the useradd man page itself).

How to remove a Sudo user on Debian?

If you deleted the sudo user in Debian, chances are you still have an entry in your sudoers file. Run visudo to remove a user from the sudoers file. Find the rule that corresponds to the user you just deleted and delete that rule. Save the file and your user should no longer be a member of the sudo group.

What's the difference between useradd and adduser?

The adduser command is very similar to the useradd command. However, it provides a more interactive way to add users to the Debian host. In general, it's better to use adduser instead of useradd (as recommended by the useradd man page itself). You will then be asked to provide specific information about your new user.

How do I remove a user from sudoers?

Run visudo to remove a user from the sudoers file. Find the rule that corresponds to the user you just deleted and delete that rule. Save the file and your user should no longer be a member of the sudo group. In the user interface you previously used to create the user, you will find the Delete user option at the bottom of the window.

What can i do with adduser in debian 9

How to add a user to Debian. Debian has two command line tools that you can use to create a new account: useradd and adduser. useradd is a low-level utility for adding users and adduser is a user-friendly interactive interface written in Perl. To use the adduser command to create a new user account named username, you need to do the following:.

How to create a Sudo user in Debian?

Add user to Debian Sudo group 1
STEP 1 : login as root user. 2
STEP 2 - Add a new user to Debian. 3
STEP 3 : add user to sudo group. 4 Test access to sudo on Debian. 5 Using sudo.

How do I add a user to sudoers?

Make sure to replace the username with the username you want to grant access to. Granting sudo access using this method is sufficient for most use cases. To verify that the user has been added to the group, enter the following: You will be prompted for a password.

Is there a way to script the adduser command?

There is no way to specify an adduser password on the command line. The only way to create a script is to provide standard input with a password (and confirmation), as happens when the program interacts with the user.

Where is the adduser Command located in Debian?

Adduser: command not found in Debian. By default, the adduser command is located in the /usr /sbin directory on your system. To fix this problem, you need to add "/usr/sbin" to your $PATH. Enter your bashrc file and try running the adduser command again. $Source ~/.

How to add a normal user in Debian?

Add regular user ¶ If adduser is called without argument and without system or group parameters, adduser adds a regular user. adduser chooses the first available UID in the range specified for regular users in the configuration file. The UID can be replaced with the uid option.

What can i do with adduser in debian 8

Add the new user to the sudo group. Sudo is configured by default on Debian 8 systems to grant all permissions to all users in the sudo group. With the groups command you can see which groups your new user is in: By default, the new user is just a part of your own group, which is created when the account is created and shares the name with the user.

Can a superuser install Sudo on Debian?

This way you don't have to share the root password with all users on your Debian Linux system. After you add a user to Sudoers, Sudoers can ■■■■■■■ commands with superuser privileges. Sudo is not installed by default on Debian 8. You must first install sudo on Debian 8 using the command aptget aptget install.

How to add user to Sudo administrative group?

Add the user to sudoers with the usermod command. To grant sudo permissions to a user, you must add the user to the sudo management group. Here's how to add a user to a group on Debian Linux using the usermod command. usermod username G sudo. Example. Let's say you have a user named josh on your Debian Linux system.

How to add a user to sudoers on Debian 10?

To do this, use the command "usermod" with a capital G (for groups). You can also use the gpasswd command for high sudo permissions. Use the groups command to check if the user belongs to the sudo group. You should now be able to make a sudo request on Debian 10.

How to add and delete users on Debian 10?

To add and remove users in Debian, you must have sudo rights or belong to the sudo group. If you don't know how to add a user to sudoers, be sure to check out the guide they wrote about it. If the error message does not appear, everything is fine; otherwise ask your system administrator to grant you sudo privileges.

How do I delete a user account in Debian?

If the user account is no longer needed, you can delete it using userdel or deluser. On Debian you should generally use the deluser command because it is easier to use than the low-level userdel command.

How to add user to sudoers in Debian?

This approach makes it easy to manage sudo permissions. The file name doesn't matter, but the username is usually assigned by the username. To give a user access to sudo on Debian, simply add the user to the "sudo" group.

How to test the sudo access in Debian?

Test access to sudo on Debian By adding a user to the sudo group, you grant them access to sudo. To test access to sudo for a user, log in with a user account or switch to a user account with the su (switch user) command. Now run the sudo command and then the whoami command.

How do I add a root user in Linux?

Red Hat Linux There are two ways to add users to your system: from the command line and using a graphical tool. To add a user from the command line, open a terminal and switch to the root account by running su and entering the root password. Then use the command useradd with a space and username as an argument.

How do I add users to a Linux server?

When you create a new server on Linux, by default you only get the default "root" account. However, if you want to add more users, you can do so by logging into this root account and typing the command: "add new user".

Debian adduser

Debian Linux uses the adduser command to create users from the command line. Use the adduser command followed by the username to create a new user with the default options. After you run the adduser command, you will be prompted to set a password for the new user. Default user information is defined in /.

How to create user account with useradd command?

Using the useradd command without parameters will only create a user account in the /etc/passwd file. Let's create an account for the "debian" user. To force the useradd command to create a home directory for the new user, as well as create a command to copy the template files from the /etc/skel directory and change the default shell, use the following parameters:.

What do you need to know about useradd in Linux?

On Linux, the useradd command is a low-level utility used to add/create user accounts on Linux and other Unix-like operating systems. The adduser command is very similar to the useradd command in that it is just a symbolic link. Examples of Useradd commands.

Which is the default base directory in useradd?

The following options apply to the useradd command: Default system home directory if d HOME_DIR is not specified. BASE_DIR is concatenated with the account name to define the home directory. If the m option is not used, BASE_DIR must be present.

How to set the primary group in useradd?

If the variable is set to no (or if N/nousergroup is specified on the command line), useradd sets the new user's primary group to the value specified in the GROUP variable in /etc/default/useradd, or the default value is 100 .

What is the difference between adduser and useradd?

The main difference between adduser and useradd is that adduser is used to add users by setting account home directory and other parameters whereas useradd is a low level utility for adding users. This article explains the difference between the two commands.

Which Linux command is used to add user account?

• The useradd command is used to create new accounts on Linux.
• usermod command to change existing accounts in Linux
• The userdel command is used to delete a local account on Linux.
• The passwd command used assigns passwords to local accounts or users.
• The change command is used to view and change the password expiration information for the user.

What is dmesg command in Unix do?

• List of all drivers loaded in the kernel. can use text editing tools
• List of all discovered devices. To see which hard drives were recognized by the kernel, you can search for the sda ​​keyword with, for example, grep
• Print only the first 20 lines of the output.
• Print only the last 20 lines of the output.
• Search for a found device or specific channel.

What does 'mkdir' command do in Unix?

The UNIX mkdir command allows users to create directories or directories as specified on some operating systems. The mkdir command can create multiple folders at once and can also set permissions when creating a folder.

How does the useradd command work in Linux?

• The driver changes the files below for the new user account.
• It will create a new home directory for the new user (default path /home/$new_username).
• Automatically set the owner and required permissions for the home folder.

Ubuntu adduser

On Ubuntu Linux, the useradd tool is a low-level utility. adduser is a script that acts as a nice interactive interface for useradd. Adding a user from the command line Adding a new user to Ubuntu from the command line is relatively quick and easy. To create a new user, simply call the adduser command followed by the username.

How do I create an user in Ubuntu?

Steps to create a user account in Ubuntu Linux Open a terminal application Connect to the remote box by running ssh user @ yourubuntuboxip To add a new user to Ubuntu, run sudo adduser userName Enter your password here and other details in Information required to create a user account user on Ubuntu server The new username is added to the /etc/passwd file and the encrypted password is stored in the /etc/shadow file.

How do I make user root in Ubuntu?

Steps to enable root user in Ubuntu
Step 1 : Search for Terminal applications in the search bar, click Terminal or press Ctrl + Alt + T to open it.
Step 2 : For security reasons, you can't log into the terminal as root by default.

What's the difference between "adduser" and "useradd"?

The main difference between adduser and useradd is that adduser is used to add users with personal account settings and other settings while useradd is a low level utility for adding users. This article explains the difference between the two commands.

What are the commands for Ubuntu?

Ubuntu command list for beginners. mv - Short for move, this command can be used to move files from one folder to another. rm - Short for delete, this command is used to delete files or folders. cd - short for change, you can use this command to change the current directory.