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Bookmark or Share- regex - Meaning of "=~" operator in shell script - Stack OverflowAn additional binary operator, =~, is available, with the same precedence as == and !=. When it is used, the string to the right of the operator is considered an extended regular expression and matched accordingly (as in regex (3)). The return value is 0 if the string matches the pattern, and 1 otherwise.
- Bash Script : what does #!/bin/bash mean? - Stack Overflow8. @ShivanRaptor #!/bin/bash Means run this script in bash. #!/bin/sh means run this script in sh which is the default unix shell, which might be bash or any other variant like ksh, dash, zsh, etc. – Karthik T. Dec 14, 2012 at 3:10. When bash is run as sh, it behaves differently (more POSIX-like) than when it is run as bash.
- linux - What does $@ mean in a shell script? - Stack OverflowIn brief, $@ expands to the arguments passed from the caller to a function or a script. Its meaning is context-dependent: Inside a function, it expands to the arguments passed to such function. If used in a script (outside a function), it expands to the arguments passed to such script. $ cat my-script. #! /bin/sh.
- bash - Shell equality operators (=, ==, -eq) - Stack OverflowBash variables are untyped so [[ "yes" -eq "no" ]] is equivalent to [[ "yes" -eq 0 ]] or [[ "yes" -eq "any_noninteger_string" ]] -- All True. The -eq forces integer comparison. The "yes" is interpreted as a integer 0; the comparison is True if the other integer is either 0 or the string result is 0.
- What does $# mean in shell? - Unix & Linux Stack Exchange15. Actually, `$` refer to `value of` and. `#` refer to `number of / total number`. So together. `$#` refer to `The value of the total number of command line arguments passed.`. Thus, you can use $# to check the number of arguments/parameters passed like you did and handle any unexpected situations.
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