- bash
 - ls >archivo
 - ls existo noexisto 2>&1 >sal | cat
 - expansions
  - {}
 - history
  - ^mkdir^cd^
	- HISTTIMEFORMAT="%F %T " history
 - completion
 - for i in *.txt ; do echo next? $i ; read && vim $i ; done
 - while sleep 1; do clear ; who ; done
 - PROMPT_COMMAND='[ $? -eq 1 ] && echo -e -n "\e[0;39m" || echo -e -n "\e[1;31m"'
 - readline
- watch
 - watch -n 1 who
 - -d
- find
 - -exec
 - -print0
- xargs
 - -0
  - find . -name '*.old' -print0 |xargs -0 rm
  - dpkg -L xbase-clients |grep bin | xargs -n1 basename |xargs apropos|grep led
- cat
 - header - footer 
 - -n
- sort
 - -u
 - -n
 - -z
- uniq
- grep
 - -o
 - -v
 - -lZ
- cut
 - -d
- head
- tail
- sed
 - -n
- awk
- nc
- ssh
- xclip
 - alias xi="xclip -i"
 - alias xo="xclip -o"


- Ejemplos
 - history | cat -n |grep '.\{60,\}'
 - ls | cat -n | head -20 | tail -3 (18, 19, 20)
 - for i in *.mp3; do echo $i | mv "$i" "`sed -e 's/\(..\)\./\1 - /'`" ; done
 - find . -name '*.JPG' | while read i; do mv "$i" "`echo $i | sed -e 's/\.JPG$/\.jpg/'`"; done
 - COLUMNS=200 dpkg -l |awk '{print $2 " " $3}'| while read paq ver ; do if ! (apt-cache madison $paq |grep -q '$ver.*sid') ; then echo "$paq - $ver"; fi ; done
 - find -mtime (argh, se reinicio mi compu y perdi el 'state')
 - chmod -R o+rw ; find . -type d -print0| xargs -0 chmod o+x