Sometimes zip files are rude and don't have a top directory. Here's a one-liner to unzip a bunch of archives into directories named after each file:

```
for f in *.zip; do unzip -d ${f/.zip/} $f; done
```

#bashTricks #shTricks #shellTricks

cut(1) and paste(1) were designed to work together.

```
paste <(cut -f1 file1) <(cut -f3 file2)
```

#bashTricks

TIL: while working remotely e.g. over SSH, to overcome accidentially pressing ctrl+d one time too often and leave the current shell, we can

export IGNOREEOF=3

and now we have to press ctrl+d 3 times to actually leave the shell/session and/or close the terminal window.

#bashtricks

Bash has a way to specify strings with escaped characters like so: $'\r\n' which gives a string containing carriage return and newline characters.

The `read` built-in can take a delimiter with the -d flag. Combining these lets you use a null character: read -d $'\0'

Useful in some of the same places you might use xargs(1).

find . -name ... -print0 | while read -d $'\0'; do ./foo "$REPLY"; done

#bashTricks #xargs #bash #shellTricks

A common parsing task is finding lines that match a pattern but only if another pattern is seen first.

The MacOS utility otool(1) prints the load commands in a Mach-O binary with a header line followed by the info about that load command on several subsequent lines.

This one liner will show just the path for every imported dylib:

otool -l foo
| awk '/LC_LOAD_DYLIB/{ in_dylib_lc=1 }; in_dylib_lc == 1 && /name/ { in_dylib_lc = 0; print }'

#bashTricks #awk #shellTricks

#bashTricks glob expansion has a character set match syntax syntax, kinda similar to regular expressions: square brackets `[]` will match any of the characters inside. E.g. `[a-d]*` matches all files that start with a, b, c, or d.

You can also negate the list by starting it with a carat, e.g. `.[^.]*` would match hidden files that don't start with 2 dots. I use this with `alias l.=ls -d .[^.]*`

Still my favorite lesser known Bash feature is glob expansion during editing. Type

And then press Ctrl-X followed by star, expression will be expanded and then you can remove items you'd like to exclude (either inside bash or press Ctrl-X followed by Ctrl-E to launch $EDITOR) #bashTricks