Feb 10, 2012 · The shell command and any arguments to that command appear as numbered shell variables: $0 has the string value of the command itself, something like script, ./script, …

Feb 20, 2011 · This latter usage is faster, does not contaminate the shell's variable namespace with what amounts to temp variables, can often be a lot more readable for humans and …

Jan 16, 2014 · You can find a very nice reference for bash's [ aka test builtin's operators here, or by running help test in a bash shell or info bash test or info bash '[' from any shell¹. If you are …

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.

In a bash script, using the conditional "or" in an "if" statement Ask Question Asked 13 years, 3 months ago Modified 1 year ago

Feb 17, 2018 · Closed 7 years ago. I have a bash script that calls various commands and prints some output (both from the called commands themselves, such as git pull, and informative …

For reading the script and executing it, I know what it does, but not what -lt and -gt are for. Can somebody tell me what is the name of that kind of 'tool' and what they (-lt and -gt) do?

$ ./my_script -p '/some/path' -a5 Argument p_out is /some/path Argument arg_1 is 5 There is a helpful Small getopts tutorial or you can type help getopts at the shell prompt. Edit: The …

Here is some handy information from the ABSG: "Redirection simply means capturing output from a file, command, program, or script and sending it as input to another file, command, program, …

See What is the difference between > and >> (especially as it relates to use with the cat program)?, What does “3>&1 1>&2 2>&3” do in a script? and of course, your shell's manual. …