Difference between ${} and $() in a shell script - Super User
Difference between $ {} and $ () in a shell script Ask Question Asked 10 years, 4 months ago Modified 8 months ago
bash - Shell equality operators (=, ==, -eq) - Stack Overflow
Shell equality operators (=, ==, -eq) Asked 11 years, 10 months ago Modified 3 years, 5 months ago Viewed 644k times
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?
error in unix shell script - Unix & Linux Stack Exchange
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What are the special dollar sign shell variables? - Stack Overflow
Sep 14, 2012 · $! is the PID of the most recent background command. $0 is the name of the shell or shell script. Most of the above can be found under Special Parameters in the Bash …
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 …
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 …
shell - How can I compare numbers in Bash? - Stack Overflow
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What is the difference between shell, console, and terminal?
The shell is the program which actually processes commands and returns output. Most shells also manage foreground and background processes, command history and command line editing.
How do I get into a Docker container's shell? - Stack Overflow
May 11, 2015 · 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 …