The system default shell is defined in /etc/default/useradd file. Your default shell is defined in /etc/passwd file. You can change it by chsh command. The $SHELL variables usually stores the current shell executable path.
Where is the bash shell located?
It’s available in the /bin/ls , and since Bash has the /bin folder in its paths list, you can just type ls to use it. ls lists the files in the current folder. You usually start from your home folder, which depends on the system but on macOS is under /Users .
Where are shell programs stored?
System-wide start-up scripts: /etc/profile for login shells, and /etc/bashrc for interactive shells. User define start-up scripts: ~/. bash_profile for login shells, and ~/.
Where is default shell set in Linux?
Your default login shell is /bin/bash now. You must log out and log back in to see this change.
Which Linux shell is best?
Top 5 Open-Source Shells for Linux
- 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. …
- Zsh (Z-Shell) …
- Ksh (Korn Shell) …
- Tcsh (Tenex C Shell) …
- Fish (Friendly Interactive Shell)
How does Linux shell work?
The shell is your interface to the operating system. It acts as a command interpreter; it takes each command and passes it to the operating system. It then displays the results of this operation on your screen.
How do I know my current shell?
To test the above, say bash is the default shell, try echo $SHELL , and then in the same terminal, get into some other shell (KornShell (ksh) for example) and try $SHELL . You will see the result as bash in both cases. To get the name of the current shell, Use cat /proc/$$/cmdline .
How do I know which shell?
Use the following Linux or Unix commands:
- ps -p $$ – Display your current shell name reliably.
- echo “$SHELL” – Print the shell for the current user but not necessarily the shell that is running at the movement.
How many types of shell are there?
Here is a short comparison of the all 4 shells and their properties.
…
Root user default prompt is bash-x. xx#.
| Shell | The GNU Bourne-Again Shell (Bash) |
|---|---|
| Path | /bin/bash |
| Default Prompt (non-root user) | bash-x.xx$ |
| Default Prompt (Root user) | bash-x.xx# |
What is $? In shell script?
$? is a special variable in shell that reads the exit status of the last command executed. After a function returns, $? gives the exit status of the last command executed in the function.
When a shell script is executed shell?
Steps to write and execute a script
- Open the terminal. Go to the directory where you want to create your script.
- Create a file with . sh extension.
- Write the script in the file using an editor.
- Make the script executable with command chmod +x <fileName>.
- Run the script using ./<fileName>.