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I know that when creating symbolic links the paths must be absolute, or relative to the destination location

If I'm making a link in /usr/local/bin that points to a file in the current directory, is there an easier way - something, for example, that works with tab-completion in bash - than to do ...

ln -s $(pwd)/target_file /usr/local/bin/

...?
(Where $(_something_) evaluates the _something_ and substitutes it into the shell command.)

  • ln -s $PWD/<tab> works for me. – muru Nov 5 '18 at 21:51
  • Well, I guess using the shell variable is better than using substitution. Thanks for the info. (Why not make it an answer?) – user3.1415927 Nov 5 '18 at 22:05
  • Wasn't sure if it worked for you. – muru Nov 5 '18 at 22:10
  • Indeed it does. – user3.1415927 Nov 5 '18 at 22:10
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Tab-completion for files works with the $PWD variable for me:

bash-4.4$ touch bar baz
bash-4.4$ ln -s $PWD/ba<tab>
bar  baz
2

For completion, some alternatives in zsh:

  • ~0 (or ~+0) is a slightly shorter alternative for $PWD (and filename completion works just as well after $PWD/fi<Tab> than after ~0/fi<Tab>, or $(pwd)fi<Tab>); ~1, ~2... are the previous directories you've been in, the completion system can also be configured to show you which they were and be expanded (upon ~+<Tab>).
  • One can use ln -s file(:A) /usr/local/bin, where (:A) causes file to be expanded to its absolute path (beware that it resolves symlinks to their targets though).

Also note the -r/--relative option of GNU ln:

ln -rs file /usr/local/bin/

Would make a /usr/local/bin/file symlink that points (as a relative path, so maybe something like ../../../home/you/file) to the file in the current directory, similar to:

ln -s "$(realpath -s --relative-to=/usr/local/bin file)" /usr/local/bin

(with GNU realpath).

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