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  1. What is the meaning of $? in a shell script? - Unix & Linux Stack …

    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 encourages the …

  2. Difference between ${} and $() in a shell script - Super User

    Difference between $ {} and $ () in a shell script Ask Question Asked 10 years, 5 months ago Modified 10 months ago

  3. Shell scripting: -z and -n options with if - Unix & Linux Stack Exchange

    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 using a …

  4. What is $* and $# in Linux? - Super User

    What do the following environment variables in Linux mean? What is $* (dollar sign followed by an asterisk)? What is $# (dollar sign next to a hash mark/number sign/octothorpe/pound sign)?

  5. Precedence of the shell logical operators - Unix & Linux Stack Exchange

    This has confused me a lot in trying to write shell script pipelines with different logic based on some test (e.g. exiting if a file doesn't exist vs continuing the pipeline).

  6. Shell script echo new line to file - Super User

    Shell script echo new line to file Ask Question Asked 14 years, 5 months ago Modified 12 years, 5 months ago

  7. shell script - How to execute .sh files on Windows? - Super User

    0 To run the shell script from the windows. First use the command : dos2unix then you can use your normal command : sh runide.sh This will work out.

  8. shell script - How to iterate a CSV file in bash? - Unix & Linux Stack ...

    Nov 28, 2019 · First of all, avoid doing text-parsing with shell loops. It is hard to do, easy to get wrong and very hard to read. And slow. Very, very, slow. Instead, use something like awk which is …

  9. How to activate python virtualenv through shell script?

    Apr 30, 2020 · The same thing I am trying to achieve I have to run this command source .venv/bin/activate through a bash script which is not running, as I need the env should get activated …

  10. looping through `ls` results in bash shell script - Super User

    Sep 6, 2017 · 169 Does any one have a template shell script for doing something with ls for a list of directory names and looping through each one and doing something? I'm planning to do ls -1d */ to …