General, not macOS-specific or
Linux-specific,
and see also shell
to yak-shave your way into whole other shell paradigms.
See, more specifically, ’fish](fish.html) and [bash`.
I suppose if I were a good person I’d submit the following
to tldr or bro pages
or version my .cheats folder in my
dotfile repo,
but I’m now exhausted and just want to go home.
File system tricks
Watch That Filesystem, by
Al Williams, discusses how to trigger things based on filesystem events via
inotifywait and incron.
Which process is bound to $PORT?
lsof -nP -i4TCP:$PORT | grep LISTEN # macOS High Sierra or later
lsof -nP -iTCP:$PORT | grep LISTEN # everyoneWhich file is crashing/hanging $PID?
lsof -r -p $PID | grep /path/to/fileVars, expansions, file names, white space hell
See bash or ’fish` depending on your choice of shell.
Or avoid both by using some other utility.
rename is a script
that makes renaming work how you imagine it should,
avoiding the mysterious punctuation stew at least somewhat.
rename -s html txt *.htmlNB depending on your distro you may get some other systutil rename which is much less powerful than the one I linked to, albeit still often powerful enough.
Text processing
Trailing whitespace
A shell script to remove trailing whitespace from a file -
put this in trimspace.sh:
#!/bin/bash
# macOS version
sed -i '' -e’s/[[:space:]]*$//' "$1"#!/bin/bash
# GNU version
sed -i -e’s/[ \t]*$//' "$1"Then you can trim trailing whitespace from your… whatever… by putting this line in there:
find . -type f -print0 | xargs -0 -I {} trimspace.sh \{\}Data wrangling
See text data processing.
Misc
Download from command line without getting owned
curl --tlsv1.2 --proto =https --location --remote-name-all --remote-header-namefind common diacritics in filenames because of some kind of unicode strife
find . -iname "*[üñàáèéöäçã]*"Which process is bound to $PORT?
lsof -nP -i4TCP:$PORT | grep LISTENSync only if drive present
test -d /Volumes/syncdrive/ && rsync --delete -avz \
192.168.0.1:/path/to/stuff/ /Volumes/syncdrive/Set operations
comm.
Meta-command-lines
Command lines to command your command lines.
tldr
tldr:
New to the command-line world? Or just a little rusty? Or perhaps you can’t always remember the arguments to
lsof, ortar?
…And the manual is utterly incomprehensible, so remembering is obviously preferable to trying to decipher it.
First
npm install -g tldror
brew install tldrthen
tldr tarcheat
…allows you to create and view interactive cheatsheets on the command-line. It was designed to help remind *nix system administrators of options for commands that they use frequently, but not frequently enough to remember.
pip install cheat
cheat tarbro pages
…are a highly readable supplement to man pages. Bro pages show concise, common-case examples for Unix commands. The examples are submitted by the user base, and can be voted up or down; the best entries are what people see first when they look up a command.
bropages is conspicuously silent on why they chose “bro”, although they do have perhaps the nicest social editing workflow to compensate for the unfortunate choice.
gem install bropages
bro tarhow do i
Are you a hack programmer? Do you find yourself constantly Googling for how to do basic programing tasks?
Suppose you want to know how to format a date in bash. Why open your browser and read through blogs (risking major distraction) when you can simply stay in the console and ask
howdoi
$ pip install howdoi
$ howdoi tarSeems to search the internet for you, and not be command-line specific, which is broader in scope than some of the other entrants here, but also noisier.
commandlinefu
is basically bro pages bit with a more esoteric API for querying and no integration of the social features.
$ curl https://www.commandlinefu.com/commands/matching/tar/dGFy/sort-by-votes/plaintextThe dGFy bit is a base64 encoding of tar for some godawful reason.
bash hackers wiki
bash hackers wiki: avoid its the paradigmatically awful bash manual