What is the meaning of $? in a shell script? - Unix & Linux Stack …
Feb 20, 2011 · When going through one shell script, I saw the term "$?". What is the significance of this term?
shell - Difference between sh and Bash - Stack Overflow
Shell - "Shell" is a program, which facilitates the interaction between the user and the operating system (kernel). There are many shell implementations available, like sh, Bash, C shell, Z …
bash - Shell equality operators (=, ==, -eq) - Stack Overflow
Shell equality operators (=, ==, -eq) Asked 12 years ago Modified 3 years, 6 months ago Viewed 649k times
What do $? $0 $1 $2 mean in a shell script? - Stack Overflow
I often come across $?, $0, $1, $2, etc in shell scripting. I know that $? returns the exit status of the last command: echo "this will return 0" echo $? But what do the others do? …
Difference between Login Shell and Non-Login Shell?
May 8, 2012 · I understand the basic difference between an interactive shell and a non-interactive shell. But what exactly differentiates a login shell from a non-login shell? Can you give …
How do I get a console-like connection into a Docker container's …
docker debug <container or image> It allows you to get a shell (bash/fish/zsh) into any container. It also works for stopped containers and images. Essentially it's a replacement of docker exec …
How to highlight bash/shell commands in markdown?
Here shell is an alias for bash. Chroma has something called Session. Pygments (doc) uses console, shell-session for bash sessions, pwsh-session, ps1con for power shell sessions and …
shell - How to concatenate string variables in Bash - Stack Overflow
Nov 15, 2010 · A bashism is a shell feature which is only supported in bash and certain other more advanced shells. It will not work under busybox sh or dash (which is /bin/sh on a lot of …
shell - What is the "eval" command in bash? - Unix & Linux Stack …
What can you do with the eval command? Why is it useful? Is it some kind of a built-in function in bash? There is no man page for it..
How do I check if a directory exists or not in a Bash shell script?
What command checks if a directory exists or not within a Bash shell script?