/* Code Comments */

Unzipping A File From The Command Line

May 22, 2019

I should start with the observation that I hate using my mouse.

Yet, that was exactly what I was about to do today to unzip a file. The reason was simple, I didn’t (yet) know how to unzip files from the command line.

So, I learned - and it turns out it’s pretty simple.

Steps:

  1. Make sure you have an Unzip program installed
  2. Look at the documentation to see what you might need to do
  3. Run the program

Make sure you have an unzip program installed

MacOS comes with an unzip program pre-installed, but if you don’t have one, this would be the first step.

For example, with Homebrew, you could brew install unzip. This, it turns out, is how I found out MacOs came with its own.

Once, I installed unzip, I received this message in the logs:

unzip is keg-only, which means it was not symlinked into /usr/local,
because macOS already provides this software and installing another version in
parallel can cause all kinds of trouble.

If you need to have unzip first in your PATH run:
  echo 'export PATH="/usr/local/opt/unzip/bin:$PATH"' >> ~/.zshrc

Okay, fair enough. How do I use unzip though?

How to use unzip

Pulling up the manual page, I could see the different options and put together the case I needed.

The key part for me was that the .zip file was in my Downloads and I wanted to unzip directly to a specific directory.

For this, use the -d flag.

$ unzip --man
UnZip 6.00 of 20 April 2009, by Info-ZIP.  Maintained by C. Spieler.  Send
bug reports using http://www.info-zip.org/zip-bug.html; see README for details.

Usage: unzip [-Z] [-opts[modifiers]] file[.zip] [list] [-x xlist] [-d exdir]
  Default action is to extract files in list, except those in xlist, to exdir;
  file[.zip] may be a wildcard.  -Z => ZipInfo mode ("unzip -Z" for usage).

  -p  extract files to pipe, no messages     -l  list files (short format)
  -f  freshen existing files, create none    -t  test compressed archive data
  -u  update files, create if necessary      -z  display archive comment only
  -v  list verbosely/show version info       -T  timestamp archive to latest
  -x  exclude files that follow (in xlist)   -d  extract files into exdir
modifiers:
  -n  never overwrite existing files         -q  quiet mode (-qq => quieter)
  -o  overwrite files WITHOUT prompting      -a  auto-convert any text files
  -j  junk paths (do not make directories)   -aa treat ALL files as text
  -C  match filenames case-insensitively     -L  make (some) names lowercase
  -X  restore UID/GID info                   -V  retain VMS version numbers
  -K  keep setuid/setgid/tacky permissions   -M  pipe through "more" pager
See "unzip -hh" or unzip.txt for more help.  Examples:
  unzip data1 -x joe   => extract all files except joe from zipfile data1.zip
  unzip -p foo | more  => send contents of foo.zip via pipe into program more
  unzip -fo foo ReadMe => quietly replace existing ReadMe if archive file newer
  1. Example: Unzipping to a specific folder $ unzip file -d destination_dir

You should be greeted by a log of contents unzipping.

$ unzip ~/Downloads/js-recent-parts.zip -d .
Archive:  /Users/stephen/Downloads/js-recent-parts.zip
   creating: ./destructuring/
  inflating: ./destructuring/ex.fixed.js
  inflating: ./destructuring/ex.js
   creating: ./template-strings/
  inflating: ./template-strings/ex.fixed.js
  inflating: ./template-strings/ex.js
   creating: ./async-await/
  inflating: ./async-await/ex.fixed.js
  inflating: ./async-await/ex.js
   creating: ./regex/
  inflating: ./regex/ex.fixed.js
  inflating: ./regex/ex.js
   creating: ./__MACOSX/
   creating: ./__MACOSX/regex/
  inflating: ./__MACOSX/regex/._ex.js
   creating: ./iterators-generators/
  inflating: ./iterators-generators/ex.fixed.js
  inflating: ./iterators-generators/ex.js

You can then verify that all of the contents are where you expect, with ls:

$ ls -lah
total 0
drwxr-xr-x  8 stephen  staff   256B May 22 08:18 .
drwxr-xr-x  8 stephen  staff   256B May 22 08:12 ..
drwxrwxr-x@ 3 stephen  staff    96B Mar  9 14:20 __MACOSX
drwxr-xr-x@ 4 stephen  staff   128B Mar  9 06:53 async-await
drwxr-xr-x@ 4 stephen  staff   128B Mar  9 06:53 destructuring
drwxr-xr-x@ 4 stephen  staff   128B Mar  9 06:53 iterators-generators
drwxr-xr-x@ 4 stephen  staff   128B Mar  9 06:54 regex
drwxr-xr-x@ 4 stephen  staff   128B Mar  9 06:54 template-strings

Voila - that’s it! Now you can unzip files directly from the command line.


Stephen Weiss

Thanks for reading! My name's Stephen Weiss. I live in Chicago with my wife, Kate, and dog, Finn.
Click here to see the archives of my weeks in review and sign up yourself!