Whoami Command in Linux

whoami command is used both in Unix Operating System and as well as in Windows Operating System.

1. It is basically the concatenation of the strings “who”,”am”,”i” as whoami.
2. It displays the username of the current user when this command is invoked.
3. It is similar as running the id command with the options -un.

1. How do you use Whoami command?
2. What is Whoami in shell script?
3. What is Suu command?
4. Who command in Linux with syntax?
5. What are the basic components of Linux?
6. What does id command do in Linux?
7. How do you use commands in Linux?
8. What does Whoami command do in Unix?
9. How do I display time in Linux?
10. What is SU vs Sudo?
11. How do I run a sudo command?
12. How do I login as Sudo in putty?

How do you use Whoami command?

To use whoami, run cmd.exe first. To learn the name of the logged-on user, simply type whoami and hit Enter. This is particularly useful if you're logged on as a standard user, but running an elevated Command Prompt window. For a complete list of Whoami parameters, and for learning about the syntax, type whoami /?

What is Whoami in shell script?

You can use the whoami command in shell scripts to check the user's name running the script. ... If the user name does not match the given string, the script will echo a message and exit. The whoami command is also handy for verifying the user's name after switching to another user with the su command.

What is Suu command?

DESCRIPTION. The su command is used to become another user during a login session. Invoked without a username, su defaults to becoming the superuser. The optional argument - may be used to provide an environment similar to what the user would expect had the user logged in directly.

Who command in Linux with syntax?

The who command displays the following information for each user currently logged in to the system if no option is provided :

• Login name of the users.
• Terminal line numbers.
• Login time of the users in to system.
• Remote host name of the user.

What are the basic components of Linux?

Every OS has component parts, and the Linux OS also has the following components parts:

• Bootloader. Your computer needs to go through a startup sequence called booting. ...
• OS Kernel. ...
• Background services. ...
• OS Shell. ...
• Graphics server. ...
• Desktop environment. ...
• Applications.

What does id command do in Linux?

id command in Linux is used to find out user and group names and numeric ID's (UID or group ID) of the current user or any other user in the server. This command is useful to find out the following information as listed below: User name and real user id.

How do you use commands in Linux?

Linux Commands

1. pwd — When you first open the terminal, you are in the home directory of your user. ...
2. ls — Use the "ls" command to know what files are in the directory you are in. ...
3. cd — Use the "cd" command to go to a directory. ...
4. mkdir & rmdir — Use the mkdir command when you need to create a folder or a directory.

What does Whoami command do in Unix?

In computing, whoami is a command found on most Unix-like operating systems, Intel iRMX 86, every Microsoft Windows operating system since Windows Server 2003, and on ReactOS. It is a concatenation of the words "Who am I?" and prints the effective username of the current user when invoked.

How do I display time in Linux?

Options to Display the Time

1. %T: Prints the time as HH:MM:SS.
2. %R: Prints the hour and minutes as HH:MM with no seconds, using the 24-hour clock.
3. %r: Prints the time according to your locale, using the 12-hour clock and an am or pm indicator.
4. %X: Prints the time according to your locale, using the 24-hour clock.

What is SU vs Sudo?

Both su and sudo elevate privileges assigned to the current user. The main difference between the two is that su requires the password of the target account, while sudo requires the password of the current user. ... By doing so, the current user is only granted privileged for the specified command.

How do I run a sudo command?

How to use the sudo Command

1. Syntax. To start using sudo , use the following syntax: sudo [command] ...
2. Options. sudo can be used with additional options: ...
3. RedHat and CentOS. ...
4. Debian and Ubuntu. ...
5. Basic Sudo Usage. ...
6. Run Command as a Different User. ...
7. Switch to Root User. ...
8. Execute Previous Commands with sudo.

How do I login as Sudo in putty?

You can use sudo -i which will ask for your password. You need to be in the sudoers group for that or have an entry in the /etc/sudoers file.
...
4 Answers

1. Run sudo <command> and type in your login password, if prompted, to run only that instance of the command as root. ...
2. Run sudo -i .