topic Re: need help with scripting in Operating System - HP-UX

need help with scripting

hpuxhelp — Tue, 07 Oct 2003 14:37:08 GMT

I need to remove 200 filesystems and each of these filesystems or some belongs to a different volume group...how would I do use awk to have it print out for me just 1 particulatr vg like vghello and everythings belong to that vg

Re: need help with scripting

Leif Halvarsson_2 — Tue, 07 Oct 2003 14:50:42 GMT

Hi,
I am not exact sure what you want do do, to list all logical volumes belonging to one group, try:

ls /dev/vg00/lvol*

Re: need help with scripting

Steven E. Protter — Tue, 07 Oct 2003 14:54:21 GMT

I would not use awk.

I would make a text file list of the following information:

/dev/vg00/lvname1
/dev/vg09/lvname2

call it input_file

while read -r xx
do
lvremove -f $xx
done < input_file

This script assumes the filesystem is already unmounted. If not, ask add second field space delimited. The second field will be the filesystem name.

Data is:
/dev/vg01/lvname1 /filesystemname

Script is:

while read -r xx yy
do
umount $yy
lvremove -f $xx
done < input_file

SEP

Re: need help with scripting

John Poff — Tue, 07 Oct 2003 15:03:58 GMT

Hi,

If you just want to see all the filesystems that are belong to a single volume group, and if you are mounting them in /etc/fstab, you could just use 'grep' to see all those entries for a particular volume group.

Something like this might work:

grep vghello /etc/fstab

Of course, if you have vghello and vghello1 and vghello2, you might find all of them. But it is a start.

As Leif has mentioned, you can use the entries for the logical volumes in the volume group device directory to provide a list of logical volumes. You could feed that to another command like 'bdf' and grab the output.

I'm just curious, but why do you have to remove 200 filesystems?

JP

Re: need help with scripting

hpuxhelp — Tue, 07 Oct 2003 15:34:30 GMT

ok, i was able to extract all the elmenents out such mnt point , and have it as text,
how do I use that text file to umount all fileystems that i have in tthat text file..

bc we no longer needs these

Re: need help with scripting

Michael Steele_2 — Tue, 07 Oct 2003 16:02:23 GMT

cat /dir/file | while read a b c d e f g h (* whatever, to end of line # of fields *)
do
fuser -ku $MOUNT_PT_VAR (*
umount $MOUNT_PT_VAR
lvremove $LOG_VOL_VAR
done

Re: need help with scripting

hpuxhelp — Tue, 07 Oct 2003 16:20:58 GMT

ok...it is not working... hm..
i had a file name test
cat test
/hello
/hi
/work
/etc....

now, i want to umount all of these mnt point that currently in test..
how can i do that?

Re: need help with scripting

Michael Steele_2 — Tue, 07 Oct 2003 16:25:38 GMT

cat test | while read a
do
fuser -ku $a
umount $a
done

Re: need help with scripting

hpuxhelp — Tue, 07 Oct 2003 16:33:36 GMT

thank you mike...it works now...

Re: need help with scripting

hpuxhelp — Tue, 07 Oct 2003 17:29:23 GMT

one more question
if I hve something like this
hello#bye
and I want to remove # sign and add a space in between hello and bye ...

I tried the cut command but it is not working/

Re: need help with scripting

Tom Ward_1 — Tue, 07 Oct 2003 20:14:13 GMT

couple of things

echo "hello#there" | sed 's/#/ /g'
gives "hello there"

and so does
echo "hello#there" | tr '#' ' '