<code bash>
sort -t, -nk3 user.csv
</code>
donde:
  * //-t//, - define que el delimitador es la ,.
  * //-n// - brinda el ordenamiento numerico. 
  * //-k3// - define que columna usará para ordenamiento.


<code bash>
manuel@lapanda:~/tmp$ cat prueba2.txt
a,3,r,t
d,5,d,d
t,7,f,g
u,3,g,w
v,9,x,k
p,0,k,l
q,1,p,h
manuel@lapanda:~/tmp$ sort -t, -nk2 prueba2.txt | cut -d, -f1,2,4  | tr  , " "
p 0 l
q 1 h
a 3 t
u 3 w
d 5 d
t 7 g
v 9 k
manuel@lapanda:~/tmp$ sort -t, -nk2 prueba2.txt | cut -d, -f1,3,4  | tr  , " "
p k l
q p h
a r t
u g w
d d d
t f g
v x k
manuel@lapanda:~/tmp$ cat gtthan.txt 
12:sdaa:adasr:fdsfr
123:perpore:asdnassd:asdasd
34:74:okoasd:urur:rrp
128:popas:rera:fosa
45:bosla:miosna:xiooan
37:woajs:losala:huasmd
100:bfluasd:zoiorewr:ojuidf
manuel@lapanda:~/tmp$ cat gtthan.txt |sort -t: -k3| awk -F: '{print $0}'
12:sdaa:adasr:fdsfr
123:perpore:asdnassd:asdasd
37:woajs:losala:huasmd
45:bosla:miosna:xiooan
34:74:okoasd:urur:rrp
128:popas:rera:fosa
100:bfluasd:zoiorewr:ojuidf
manuel@lapanda:~/tmp$ cat gtthan.txt |sort -t: -k3| awk -F: '{if ($1 > 100) print $0}'
123:perpore:asdnassd:asdasd
128:popas:rera:fosa
manuel@lapanda:~/tmp$ cat gtthan.txt |sort -t: -k3| awk -F: '{if ($1 > 100) print $0}' >pp.txt
manuel@lapanda:~/tmp$ cat pp.txt 
123:perpore:asdnassd:asdasd
128:popas:rera:fosa

</code>

<code>
 % Cortar del final
 # cortar del inicio
</code>

<code>
#!/bin/bash
IMAGEN="$1"
EXTENSION="${IMAGEN##*.}"
</code>

<code>
images=pasdasd.jpg
echo ${images##*.}
echo ${images%.*}
echo $images |rev

I="cn=lisa,dc=example,dc=com"
echo ${I##*=}
echo ${I%%=*}

ACTUAL=$(xrandr | grep current | cut -d "," -f 2)
RenX=$(echo $ACTUAL | cut -d " " -f 2)
RenY=$(echo $ACTUAL | cut -d " " -f 4)
echo ${RenX}
echo ${RenY}


</code>
====== Referencias ======

  * https://www.linux.com/tutorials/all-about-curly-braces-bash/
  * https://devhints.io/bash
  * https://www.linuxjournal.com/content/bash-brace-expansion
  * https://www.lifewire.com/test-linux-command-unix-command-4097166
  * https://stackoverflow.com/questions/17048188/how-to-use-awk-sort-by-column-3
  * https://linuxhint.com/bash_tr_command/
  * https://stackoverflow.com/questions/13690461/using-cut-command-to-remove-multiple-columns
  * https://riptutorial.com/bash/example/31704/sort-by-keys