To get a glimpse of what users are doing on the system, you can use the w command as follows. But to have a real-time view of the shell commands being run by another user logged in via a terminal or SSH, you can use the Sysdig tool in Linux.
How can I tell who is executed in Linux?
In Linux, there is a very useful command to show you all of the last commands that have been recently used. The command is simply called history, but can also be accessed by looking at your . bash_history in your home folder. By default, the history command will show you the last five hundred commands you have entered.
How can I see the command history of another user in Linux?
On Debian-based operating systems, doing tail /var/log/auth. log | grep username should give you a user’s sudo history.
How do I find user information in Linux?
11 Ways to Find User Account Info and Login Details in Linux
- id Command. id is a simple command line utility for displaying a real and effective user and group IDs as follows. …
- groups Command. …
- finger Command. …
- getent Command. …
- grep Command. …
- lslogins Command. …
- users Command. …
- who Command.
How do I find the last executed command in Linux?
3. Repeat previous command quickly using 4 different methods
- Use the up arrow to view the previous command and press enter to execute it.
- Type !! and press enter from the command line.
- Type !- 1 and press enter from the command line.
- Press Control+P will display the previous command, press enter to execute it.
What is the finger command in Linux?
Finger command is a user information lookup command which gives details of all the users logged in. This tool is generally used by system administrators. It provides details like login name, user name, idle time, login time, and in some cases their email address even.
How do I find command history in Linux?
To search for a command in the history press ctrl+r multiple times 
If I understand correctly and you want to search for older entries, just press ctrl+r again.
What is the command to list all users in Linux?
In order to list users on Linux, you have to execute the “cat” command on the “/etc/passwd” file. When executing this command, you will be presented with the list of users currently available on your system. Alternatively, you can use the “less” or the “more” command in order to navigate within the username list.
How do I find my username and password in Linux?
Can you tell me where the passwords of the users located in the Linux operating system? The /etc/passwd is the password file that stores each user account.
…
Where database can be:
- passwd – Read user account info.
- shadow – Read user password info.
- group – Read group info.
- key – Can be a user name/group name.
How do I check if a user is Sudo in Linux?
The getent group sudo command lists only users who have the sudo group. The rest of the commands test whether the user is actually capable of running as root. There are also other additions to improve the formatting of the output.
How do I view a command in Linux?
watch command in Linux is used to execute a program periodically, showing output in fullscreen. This command will run the specified command in the argument repeatedly by showing its output and errors. By default, the specified command will run every 2 seconds and watch will run until interrupted.
How do I find previous commands in Unix?
To get previous command, hit [CTRL]+[p]. You can also use up arrow key.