Linux Id Command Tutorial

1. What does id command do in Linux?
2. How do I find my Linux ID?
3. How does ID command work?
4. What is User ID Linux?
5. How do I find my UID in Linux?
6. How do I find groups in Linux?
7. Who am I command line?
8. How do I find my user ID in Linux?
9. How do I find my user ID?
10. What does last command do in Linux?
11. How do I run a cron job in Linux?
12. How can I get group name from GID?

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 I find my Linux ID?

To find a user's UID (user ID) or GID (group ID) and other information in Linux/Unix-like operating systems, use the id command. This command is useful to find out the following information: Get User name and real user ID. Find a specific user's UID.

How does ID command work?

Using the id Command

If the username is omitted, the id command displays information about the currently logged-in user. When invoked without any option, id prints the real user ID ( uid ), the user's real primary group ID ( gid ), and real IDs of the supplemental groups ( groups ) the user belongs to.

What is User ID Linux?

A UID (user identifier) is a number assigned by Linux to each user on the system. This number is used to identify the user to the system and to determine which system resources the user can access. UID 0 (zero) is reserved for the root.

How do I find my UID in Linux?

There are a couple of ways:

1. Using the id command you can get the real and effective user and group IDs. id -u <username> If no username is supplied to id , it will default to the current user.
2. Using the enviroment variable. echo $UID.

How do I find groups in Linux?

In order to list groups on Linux, you have to execute the “cat” command on the “/etc/group” file. When executing this command, you will be presented with the list of groups available on your system.

Who am I command line?

whoami command is used both in Unix Operating System and as well as in Windows Operating System. It is basically the concatenation of the strings “who”,”am”,”i” as whoami. It displays the username of the current user when this command is invoked. It is similar as running the id command with the options -un.

How do I find my user ID in Linux?

11 Ways to Find User Account Info and Login Details in Linux

1. id Command. id is a simple command line utility for displaying a real and effective user and group IDs as follows. ...
2. groups Command. groups command is used to show all the groups a user belongs to like this. ...
3. finger Command. ...
4. getent Command. ...
5. grep Command. ...
6. lslogins Command. ...
7. users Command. ...
8. who Command.

How do I find my user ID?

To retrieve your User ID and Password, you can use the `Forgot Password` feature, follow these steps:

1. Go to the website and click on Login.
2. On the login pop-up click on the `Forgot Password` link.
3. Enter your registered Email ID.
4. You will receive list of all User IDs linked with the Email ID.

What does last command do in Linux?

last is a command-line utility that displays information about the last login sessions of the system users. It is very useful when you need to track user activity or investigate a possible security breach.

How do I run a cron job in Linux?

1. The Cron daemon is a built-in Linux utility that runs processes on your system at a scheduled time. ...
2. To open the crontab configuration file for the current user, enter the following command in your terminal window: crontab –e. ...
3. You can list all cron jobs on your system without opening the crontab configuration file.

How can I get group name from GID?

You can lookup a group by name or gid using the getent command.