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

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

quicky : create / extend a fs on a redhat 5 with lvm

list volume groups :
#vgs
or
#vgdisplay

create a lv :
#lvcreate -L 10G -n lvname vgname

format the lv to ext3:
#mkfs.ext3 /dev/vgname/lvname

to create the fs, need to add the correct entry in /etc/fstab

list the lvm /fs :

#lvdisplay

extend lv :
#lvextend -L +54 /dev/vg01/lvol10 /dev/sdk3

extend fs :
#resize2fs /dev/vg01/lvol10