need help with scripting

[hpuxhelp]

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

[Leif Halvarsson_2]

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*

[Steven E. Protter]

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

[John Poff]

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

[hpuxhelp]

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

[Michael Steele_2]

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

[hpuxhelp]

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?

[Michael Steele_2 · Accepted solution]

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

[hpuxhelp]

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

[hpuxhelp]

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/

[Tom Ward_1]

couple of things

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

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