shell - Bash regex =~ operator - Stack Overflow
Oct 18, 2013 · What is the operator =~ called? I'm not sure it has a name. The bash documentation just calls it the =~ operator. Is it only used to compare the right side against the …
bash - What is the purpose of "&&" in a shell command? - Stack …
Oct 27, 2021 · Furthermore, you also have || which is the logical or, and also ; which is just a separator which doesn't care what happend to the command before.
bash - Shell equality operators (=, ==, -eq) - Stack Overflow
529 = and == are for string comparisons -eq is for numeric comparisons -eq is in the same family as -lt, -le, -gt, -ge, and -ne == is specific to bash (not present in sh (Bourne shell), ...). Using …
bash - What does <<< mean? - Unix & Linux Stack Exchange
Take a look at the Bash man page. This notation is part of what's called a here documents & here strings. It allows you the ability to generate multi-line data input as one continuous string. The …
What's the difference between <<, <<< and < < in bash?
Sep 27, 2015 · What's the difference between <<, <<< and < < in bash?Here document << is known as here-document structure. You let the program know what will be the ending text, and …
bash - Confusing use of && and - Unix & Linux Stack Exchange
bash shell scripting control-flow Improve this question edited Nov 16, 2011 at 22:16 Gilles 'SO- stop being evil'
shell - What does "-ne" mean in bash? - Stack Overflow
Jul 17, 2013 · It doesn't mean anything "in bash". [ runs a command called test. -ne is an argument to the test command, not to bash, and you can find its documentation in man test.
An "and" operator for an "if" statement in Bash - Stack Overflow
Modern shells such as Bash and Zsh have inherited this construct from Ksh, but it is not part of the POSIX specification. If you're in an environment where you have to be strictly POSIX …
What do the -n and -a options do in a bash if statement?
The switches -a and -n are not strictly part of a bash if statement in that the if command does not process these switches. What are primaries? I call them "switches", but the bash …
How to compare strings in Bash - Stack Overflow
Feb 10, 2010 · How do I compare a variable to a string (and do something if they match)?