Where is the shell found in Linux?

The system default shell is defined in the /etc/default/useradd file. Its default shell is defined in the /etc/passwd file. You can change it with the chsh command. The $SHELL variables generally store the path of the current shell executable.

Where is the bash shell located?

Is available in the /bin/ls , and since Bash has the /bin folder in its path list, you can type ls to use it. ls lists the files in the current folder. It usually starts from your home folder, which is system-dependent, but on macOS it's located in /Users.

Where are shell programs stored?

System wide startup scripts: /etc/profile for login shells and /etc/bashrc for interactive shells. User define startup scripts: ~/. bash_profile for login shells and ~/.

Where is the default shell set in Linux?

Your default login shell is /bin/bash now. You must log out and back in to see this change.

Which Linux shell is better?

Top 5 open source shells for Linux

  1. Bash (Bourne-Again Shell) The full form of the word “Bash” is “Bourne-Again Shell”, and it is one of the best open source shells available for Linux. …
  2. Zsh (Z-Shell) …
  3. Ksh (Breastplate of Korn)…
  4. Tcsh (Tenex C Housing) …
  5. Fish (Friendly Interactive Shell)

How does the Linux shell work?

The shell is your interface to the operating system. It's acts as a shell; takes each command and passes it to the operating system. It then displays the results of this operation on your screen.

How can I find out my current shell?

To test the above, say bash is the default shell, try echo $SHELL, and then, in the same terminal, access another shell (KornShell (ksh) for example) and try $SHELL. You will see the output as bash in both cases. To get the name of the current shell, Use cat /proc/$$/cmdline .

How do I know which shell?

Use the following Linux or Unix commands:

  1. ps -p $$ - Reliably display your current shell name.
  2. echo "$SHELL" - Prints the shell for the current user but not necessarily the shell that is running on the move.

How many types of shell are there?

Here is a brief comparison of all 4 shells and its properties.

The root user's default prompt is bash-x. xx#.

Shell The GNU Bourne-Again Shell (Bash)
Path /bin/bash
Default prompt (non-root user) bash-x.xx$
Default request (root user) bash-x.xx#

What is $? In shell script?

ps is a special variable in shell that reads the exit status of the last executed command. After a function returns, $? returns the exit status of the last command executed in the function.

When is a shell shell script executed?

Steps to write and run a script

  1. Open the terminal. Go to the directory where you want to create your script.
  2. Create a file with . sh extension.
  3. Write the script to the file using an editor.
  4. Make the script executable with the command chmod +x .
  5. Run the script using ./.

#shell #Linux

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