Sep 17, 2012 · Meaning of "=~" operator in shell script [duplicate] Asked 13 years, 1 month ago Modified 12 years, 3 months ago Viewed 96k times

What does $# mean in shell? I have code such as if [ $# -eq 0 ] then I want to understand what $# means, but Google search is very bad for searching these kinds of things.

When going through one shell script, I saw the term "$?". What is the significance of this term?

Oct 4, 2016 · 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 …

Oct 27, 2021 · The shell will try to create directory test and then, only if it was successful will try create file inside it. So you may interrupt a sequence of steps if one of them failed.

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.

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..

In man bash we can read in Shell Builtin Commands section (online doc): Unless otherwise noted, each builtin command documented in this section as accepting options preceded by - accepts …

Feb 27, 2011 · There is a variation of running multiple commands in one line in the shell where you want them to run simultaneously rather than one after the other. The OP was interested in …

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