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Dec 14, 2024 · 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, …
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 …
Dec 22, 2010 · 180 command-line - what is the purpose of &&? In shell, when you see $ command one && command two the intent is to execute the command that follows the && only …
I can't seem to be able to increase the variable value by 1. I have looked at tutorialspoint's Unix / Linux Shell Programming tutorial but it only shows how to add together two variables. I have tr...
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Aug 1, 2019 · What does echo $? mean in shell programming?This is the exit status of the last executed command. For example the command true always returns a status of 0 and false …
Shell equality operators (=, ==, -eq) Asked 11 years, 8 months ago Modified 3 years, 2 months ago Viewed 637k times
Aug 30, 2010 · How do I know if a variable is set in Bash? For example, how do I check if the user gave the first parameter to a function? function a { # if $1 is set ? }
Apr 3, 2012 · What does a dollar sign followed by an at-sign (@) mean in a shell script? For example: umbrella_corp_options $@
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 …
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