Install and maintain Cygwin without Windows admin rights

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These are the steps I used:
  1. Download setup-x86.exe (32bit) or setup-x86_64.exe (64bit).
  2. Run it with the “--no-admin” option
  3. During installation select the “wget” package
  4. Create /usr/local/bin/cygwin-setup.sh (for 32bit omit the “_64”):
    #! /bin/sh
rm setup-x86_64.exe
wget http://cygwin.com/setup-x86_64.exe
chmod u+x setup-x86_64.exe
run ./setup-x86_64.exe --no-admin
  5. Make the script executable:
    chmod ugo+x /usr/local/bin/cygwin-setup.sh
  6. Create a copy of the Cygwin terminal shortcut, rename it “Cygwin setup”
  7. Edit the shortcut target, replace
    mintty.exe -i /Cygwin-Terminal.ico -
    with
    mintty.exe -i /Cygwin-Terminal.ico /bin/bash -l -c 'cygwin-setup.sh'
Whenever you want to run the Cygwin installer to install or remove packages, you can just execute the shortcut or run cygwin-setup.sh from the Cygwin command prompt.
Alternatively, you could also use the pure command-line tool apt-cyg.

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