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How do we identify which shell A script should use?
Use the following Linux or Unix commands:
- ps -p $$ – Display your current shell name reliably.
- echo “$SHELL” – Print the shell for the current user but not necessarily the shell that is running at the movement.
Which command is used to print the current shell?
1) Using echo command: Basically, the echo command is used to print the input string, but it is also used to print the name of the shell which we are using with the help of the command. 2) Using ps command: ps command stands for “Process Status”. It is used to check the currently running status and their PIDs.
How can I find which shell is my script running in during runtime?
As per my knowledge, to determine the current shell we use echo $0 in the shell. Rather I want my script to check in which shell it is running. So, I tried to print $0 in the script and it returns the name of the script as it should. So, my question is how can I find which shell is my script running in during runtime?
Do you need Bash to run a shell script?
Keep in mind that it needs to be a shell script that you pass as argument. A shell script is composed of commands. If you use a normal text file, it will complain about incorrect commands. In this approach, you explicitly specified that you want to use bash as the interpreter for the script.
How do I find out what Shell I am using?
Remember $ returns the PID (process identification number) of the current process, and the current process is your shell. So running a ps on that number displays a process status listing of your shell. In that listing, you will find the name of your shell (look for CMD column). ps -p $$.
How to find out what version of Bash I’m using?
There are many ways to find out the shell and its corresponding version. Here are few which worked for me. $> echo $0 (Gives you the program name. In my case the output was -bash .) $> $SHELL (This takes you into the shell and in the prompt you get the shell name and version.