[SOLVED] UUID save as a variable

[jmncee]

I am new to linux scripting, but I have programming experience.

I need to save the UUID for /dev/sda1 as a variable, lets call it id

I am sure there is a way to do this with the awk and blkid commands, but I do not know any of this well enough yet to figure it out and after a couple of hours of reading I am still lost as to exactly how I would put this together

I need to save the uuid as a variable so that I can run an if statement with it

if [ -f /media/$id/file ]
then
echo "copy successful"
else
echo "oh crap!"

honestly all I need the uuid for but I cant check this by doing the same if with /dev/sda1/file so I need to be able to save the uuid into a variable

thanks

[tpl]

welcome to the forum

something like this might work--

id=`vol_id /dev/sda1 | grep ID_FS_UUID | head -n -1 | cut -b 12-`

[jmncee]

welcome to the forum

something like this might work--

id=`vol_id /dev/sda1 | grep ID_FS_UUID | head -n -1 | cut -b 12-`

I tried the above exactly as typed, when I echo $id I get the entire thing as one long char string, the commands inside of that ' ' are completely ignored and considered just text.

I took out the ' ' as well as adding the file path in front of vol_id so the compiler knows where to find it, but even with a sudo before id=........ When I echo the variable nothing happens

[HROAdmin26]

Google: bash scripting

Backticks

id=`vol_id -u /dev/sda1`

[jmncee]

I always get a command not found on vol_id I dont think the live linux disc I am using has that command on it.

if I use blkid /dev/sda1 -s UUID

I get almost what I need
/dev/sda1: UUID="C888848E88847D26"

anyone able to show me how to use awk or grep to just get what is in the quotes?

I am willing to learn but the articles I find on how to use the commands dont show how to use them in the way I need to, and I don't have the time here at work to dig through 100 google search results to find the information I need.

[HROAdmin26]

man cut

blkid /dev/sda1 -s UUID | cut -d \" -f 2

[jmncee]

man cut

blkid /dev/sda1 -s UUID | cut -d \" -f 2

THANK YOU

This gets me exactly the 1 piece of information I need.
The only issue I have left is that for whatever reason it is not saving it into the variable (code I am using below)

uid= sudo blkid /dev/sda1 -s UUID |cut -d\" -f 2

the line seems to ignore the uid= command and just displays the information, so when I try to echo the variable it is empty. If anyone has an idea let me know. otherwise I am 99% there and can probably figure it out on my own with a little tweaking

[jmncee]

THANK YOU

This gets me exactly the 1 piece of information I need.
The only issue I have left is that for whatever reason it is not saving it into the variable (code I am using below)

uid= sudo blkid /dev/sda1 -s UUID |cut -d\" -f 2

the line seems to ignore the uid= command and just displays the information, so when I try to echo the variable it is empty. If anyone has an idea let me know. otherwise I am 99% there and can probably figure it out on my own with a little tweaking

Nevermind, one of my co workers pointed out that I was missing ` ` around the blkid command

Thank you for all of your effort everyone