til

bash / zsh

loop

> for i in $(find . -type f); do grep <searchterm> $i -H; done;

or a little more whitespace robust

> find . -type f| while read f; do echo $f; done

i.e. do a git pull in the subdiretories of the current folder

> find . -type d -depth 1 | while read d; do git -C $d pull; done

recursive grep

> grep -r "commons-lang" .

line endings

> dos2unix.exe -i /foo/bar/some.properties
dos2unix: /foo/bar/some.properties MODE 0100644  (regular file)
   0     193       0  no_bom    text    /foo/bar/some.properties

This option prints number of line breaks (DOS Unix Mac), the byte order mark, and if the file is text or binary.

brace expansion

> echo a{p,c,d,b}e

is expanded to:

ape ace ade abe

In itself kinda useless, but think about:

> echo foo/bar/more/less/{first.foo,second.foo}
foo/bar/more/less/first.foo foo/bar/more/less/second.foo

Exchange the echo with a mv and it executes a move of a file in a distant directory without explicitly writing out the full path.

> mv foo/bar/more/less/{first.foo,second.foo}

piping

into vim

>  ls -la | vim -

git

squashing commits

Squash the last two commits:

> git rebase -i HEAD~2

vi / vim

execute shell commands

show diff to last save

> :w !diff % -

curl

Stuff to be found without a full featured browser

> curl ipinfo.io/8.8.8.8