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- shell - Bash regex =~ operator - Stack Overflow
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 left side? The right side is considered an extended regular expression If the left side matches, the operator returns 0, and 1 otherwise Why are double square brackets required when running a test? Because =~ is an operator of
- bash - Shell equality operators (=, ==, -eq) - Stack Overflow
If not quoted, it is a pattern match! (From the Bash man page: "Any part of the pattern may be quoted to force it to be matched as a string ") Here in Bash, the two statements yielding "yes" are pattern matching, other three are string equality:
- How to compare strings in Bash - Stack Overflow
Bash always seemed backward with numeric evaluations using an operator consisting of a string (-eq) and string comparisons using a numeric operator "==" or "=" just you mess you up If you ask me I'd say the problem is the distro swapping out bash That is just my opinion, but this is my fix
- 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 documentation that you linked to refers to the same thing as "primaries" (probably because this is a common term used when discussing parts of a boolean expression)
- bash - How can I call one shell script from another shell script . . .
I have two shell scripts, a sh and b sh How can I call b sh from within the shell script a sh?
- shell - Difference between sh and Bash - Stack Overflow
When writing shell programs, we often use bin sh and bin bash I usually use bash, but I don't know what's the difference between them What's the main difference between Bash and sh? What do we
- How do I iterate over a range of numbers defined by variables in Bash?
Related discusions: bash for loop: a range of numbers and unix stackexchange com - In bash, is it possible to use an integer variable in the loop control of a for loop?
- How to increment a variable in bash? - Ask Ubuntu
#! bin bash # To focus exclusively on the performance of each type of increment # statement, we should exclude bash performing while loops from the # performance measure
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