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Meaning of "=~" operator in shell script [duplicate] Asked 13 years, 2 months ago Modified 12 years, 3 months ago Viewed 96k times
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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
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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, C shell, Z shell, etc
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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
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The if statement in shell uses the command [ Since [ is a command (you could also use 'test'), it requires a space before writing the condition to test To see the list of conditions, type: man test You'll see in the man page that: s1 > s2 tests if string s1 is after string s2 n1 gt n2 tests if integer n1 is greater than n2 In your case, using > would work, because string 100 comes after
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Special shell variables verbose If set, causes the words of each command to be printed, after history substitution (if any) Set by the -v command line option echo If set, each command with its arguments is echoed just before it is executed For non-builtin commands all expansions occur before echoing
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