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Is process running bash?
Bash commands to check running process: pgrep command – Looks through the currently running bash processes on Linux and lists the process IDs (PID) on screen. pidof command – Find the process ID of a running program on Linux or Unix-like system.
Are shell and bash the same?
And when you do, you usually work with Bourne Again Shell, also known as Bash. Since its original release on June 8, 1989, Bash has become the de facto shell for the Linux OS. Of course, there are numerous shells available for Linux. In addition to Bash and Bourne shell, there are Korn, C, tcsh and Zsh.
Does a shell function run in a subshell?
Otherwise, these shell functions seems to me that they run in a subshell. Is there a way around that? The shell does not create a subshell to run a function. Of course, it does create subshells for many other purposes, not all of which might be obvious. For example, it creates subshells in the implementation of |.
How to change the PID of a subshell in Bash?
Even the $$ special variable keeps the same value in subshells: it’s the original shell’s process ID. Similarly $PPID is the PID of the parent of the original shell. A few shells change a few variables in the subshell. Bash sets BASHPID to the PID of the shell process, which changes in subshells.
Why does Bash not run in a shell?
A standard shell expects Bash understands both, but if you don’t have a shebang line or you execute the scriptfile using the sh command, you will end up using the system’s default shell, which might not be bash. Found solution, but can’t yet fully explain the problem ….
How to put a variable in a subshell in Bash?
Bash, zsh and mksh arrange for $RANDOM to yield different values in the parent and in the subshell. But apart from built-in special cases like these, all variables have the same value in the subshell as in the original shell, the same export status, the same read-only status, etc.