Bash (/bin/bash) is a popular shell on most if not all Linux systems, and it’s normally the default shell for user accounts. What is user shell in Linux ? The shell is an interactive interface that allows users to execute other commands and utilities in Linux and other UNIX-based operating systems.
What is easyto remember, however, is this: the default shell for a user is the last fieldon the user’s line in the “/etc/passwd” file, where fields are separated by the colon :symbol, and each line in that file begins with a username. Now, with that knowledge, just think: “ok, I need to find my username line in /etc/passwd”.
To find the shell you have on the default environment you can check the value of the SHELL environment variable : To find the current shell instance, look for the process (shell) having the PID of the current shell instance. To find the PID of the current instance of shell: Now to find the process having the PID: Show activity on this post.
How to check which shell Am I using in Linux?
How to check which shell am I using: Use the following Linux or Unix commands : ps -p $$ – Display your current shell name reliably. Echo “$SHELL” – Display the shell for the current user but not necessarily the shell that is running at the movement.
Yet another question we ran across in our research was “How do I know what shell is being used in Linux?”.
Some sources claimed the easiest way to find out what shell is being used is to type the following command syntax at the command line prompt: echo $SHELL . Yes, that is $SHELL in all caps, case matters in the unix world.
How can I tell what shell I am running?
There are different ways to tell what shell you are currently in . The easiest way to find that out is by using special shell parameters. For one, a special parameter named $$ denotes the PID of the current shell instance you are running. This parameter is read-only and cannot be modified.
Commonly used for listing running processes, the ps command in its basic format sheds light on the shell that you are using. Simply execute the command: From the first line of the output , we can clearly see the PID of the shell and the last column prints out the type of shell, in this case – bash.
An answer is that to display the shell used, invoke the command: $ grep “^$USER” /etc/passwd Using /etc/passwd file to show shell At the very last segment , we get to see the bash used, in this case /bin/bash This also gives you a glimpse of which shell is opened first when you first log in to your system.
The easiest way to find that out is by using special shell parameters. For one, a special parameter named $$ denotes the PID of the current shell instance you are running. This parameter is read-only and cannot be modified. So the following command will also show you the name of the shell you are running:.
How do I get the current shell name in Linux?
Echo “$SHELL” – Print the shell for the current user but not necessarily the shell that is running at the movement. Echo $0 – Another reliable and simple method to get the current shell interpreter name on Linux or Unix-like systems. Readlink /proc/$$/exe – Another option to get the current shell name reliably on Linux operating systems .