apply command (in AIX only?)

Here is a fast way to do function loop : 

apply "ssh server%1_pers date" 2 3 5 6  7 8

Replaces %1 with following parameters 

same as : 

for i in 2 3 5 6 7 8 
do
     ssh server${i}_pers date
done

Exclude files or directories from commands

An easy way to remove elements from command line : 

root:/# rm !(*.c|*.h)  => remove every files except *.c or *.h) 

another syntax : 

root:/# rm !(*.@(c|h))  => same thing ...

Can be used with grep, for directories exlusion. :

root:/#  grep P770_P7_1_A30 !(www|logs)/* => grep P770_P7_1_A30 from every underlying directories, except www and logs

Formatter la sortie en ksh

Pour avoir des chiffres sur 3 digits en shell, il suffit de formatter la variable via un typeset : 

let a=1

typeset -RZ3 variable

echo "a=$a"

a=001

sed -i doesn't work on AIX

To change a file on only one command  :

perl -p -i -e "s/iiii/uuu/" titi

tips vi

passer des commandes shells directement dans le vi :

:1,$!awk '{ print $1 }

ou prendre en input chaque ligne et l’intégrer dans une commande :

:%!awk '{ system("host "$1)}'

removing end of a variable

export TOTO=fssam0sv
echo ${TOTO%%sv}

ca retire le sv de la fin de la variable

ksh tip

simple way to get input caracter in the output text :

cat $i | bla bla | awk '{ var " " bla bla bla $1" "$2 bla bla }' var=$i >> out

nice awk tip !

- ex : to delete disks not belonging to rootvg :

lspv | grep -v rootvg|awk '{ print "rmdev -dl "$1 }'| ksh

Very useful to treat multiple lines commands in one line .... instead of the usual for i in ....