[SOLVED] Script to watch disk space

slayer_1994 · 09-26-2017, 08:17 AM

Hi

I want to create a script looking at the % used for the disk space for 3 specific filesystems

I know the command df -h gives me the fileystems list etc but stuck on how I grep for the 3 filesystems

Code:

Filesystem                    Size  Used Avail Use% Mounted on
devtmpfs                      6.8G     0  6.8G   0% /dev
tmpfs                         6.8G     0  6.8G   0% /dev/shm
tmpfs                         6.8G  681M  6.1G  10% /run
tmpfs                         6.8G     0  6.8G   0% /sys/fs/cgroup
/dev/mapper/rootvg-rootlv      40G  3.8G   37G  10% /
/dev/sda1                     950M  307M  643M  33% /boot
/dev/mapper/rootvg-homelv     1.9G  195M  1.7G  11% /home
/dev/mapper/rootvg-tmplv      3.8G   33M  3.7G   1% /tmp
/dev/mapper/rootvg-itmlv      5.0G  508M  4.5G  10% /opt/IBM/ITM
/dev/mapper/vg101-lvol1        50G   22G   29G  44% /u101
/dev/mapper/vg01-lvol1        100G   23G   78G  23% /u01
/dev/mapper/rootvg-varlv      4.7G  1.4G  3.3G  31% /var
/dev/mapper/rootvg-calv        21G  531M   20G   3% /opt/ca
ccbtestnfs1:/CCBTEST_ARCHIVE   20G   32M   20G   1% /u50/CCBTEST_ARCHIVE
ccbtestnfs1:/CCBTEST          600G  295G  306G  50% /u50/CCBTEST
tmpfs                         1.4G     0  1.4G   0% /run/user/0
esdamlinux:/LINUX             331G  298G   19G  95% /LINUX
tmpfs                         1.4G     0  1.4G   0% /run/user/54348
tmpfs                         1.4G     0  1.4G   0% /run/user/120
tmpfs                         1.4G     0  1.4G   0% /run/user/74006
tmpfs                         1.4G     0  1.4G   0% /run/user/1905570915

I want to grep for the 3 following:

1. /opt/ca
2. u50
3. u01

Quote:

/dev/mapper/rootvg-calv 21G 531M 20G 3% /opt/ca
ccbtestnfs1:/CCBTEST_ARCHIVE 20G 32M 20G 1% /u50/CCBTEST_ARCHIVE
ccbtestnfs1:/CCBTEST 600G 295G 306G 50% /u50/CCBTEST
/dev/mapper/vg01-lvol1 100G 23G 78G 23% /u01

Thanks in advance

rtmistler · 09-26-2017, 08:59 AM

Hi,

So you have the commands and the additional qualifications for them (to pipe to grep)

I repeat something I've always said about bash scripts, which is

Quote:

Anything you can type into a command line, you can write into a bash script

Therefore, have you started a script? Do you know how to write a rudimentary bash script?

Please understand that LQ members are volunteers and we are happy to help you solve and/or refine a solution to your problem. But you need to execute that solution yourself, by writing a script and then asking members to help you if there are problems or to improve it somehow.

Please consider writing a script to do the command and then determine what additional things you want it to do. Note also that a single command is not necessarily helpful, and in fact you can more easily create an alias as opposed to writing a script. For a script, you likely would want to do other things. A script will work, but if your intent is to just make a shortcut for a command, then an alias may be better. Perhaps there are other things you intend to do or perhaps you intend to monitor this data regularly versus manually call it. Please update the forum with some additional information about this.

Best Regards.

TenTenths · 09-26-2017, 08:59 AM

So what have you done so far?

TB0ne · 09-26-2017, 08:59 AM

Quote:

Originally Posted by slayer_1994

Hi
I want to create a script looking at the % used for the disk space for 3 specific filesystems I know the command df -h gives me the fileystems list etc but stuck on how I grep for the 3 filesystems

Code:

Filesystem                    Size  Used Avail Use% Mounted on
devtmpfs                      6.8G     0  6.8G   0% /dev
tmpfs                         6.8G     0  6.8G   0% /dev/shm
tmpfs                         6.8G  681M  6.1G  10% /run
tmpfs                         6.8G     0  6.8G   0% /sys/fs/cgroup
/dev/mapper/rootvg-rootlv      40G  3.8G   37G  10% /
/dev/sda1                     950M  307M  643M  33% /boot
/dev/mapper/rootvg-homelv     1.9G  195M  1.7G  11% /home
/dev/mapper/rootvg-tmplv      3.8G   33M  3.7G   1% /tmp
/dev/mapper/rootvg-itmlv      5.0G  508M  4.5G  10% /opt/IBM/ITM
/dev/mapper/vg101-lvol1        50G   22G   29G  44% /u101
/dev/mapper/vg01-lvol1        100G   23G   78G  23% /u01
/dev/mapper/rootvg-varlv      4.7G  1.4G  3.3G  31% /var
/dev/mapper/rootvg-calv        21G  531M   20G   3% /opt/ca
ccbtestnfs1:/CCBTEST_ARCHIVE   20G   32M   20G   1% /u50/CCBTEST_ARCHIVE
ccbtestnfs1:/CCBTEST          600G  295G  306G  50% /u50/CCBTEST
tmpfs                         1.4G     0  1.4G   0% /run/user/0
esdamlinux:/LINUX             331G  298G   19G  95% /LINUX
tmpfs                         1.4G     0  1.4G   0% /run/user/54348
tmpfs                         1.4G     0  1.4G   0% /run/user/120
tmpfs                         1.4G     0  1.4G   0% /run/user/74006
tmpfs                         1.4G     0  1.4G   0% /run/user/1905570915

I want to grep for the 3 following:
1. /opt/ca
2. u50
3. u01

Glad to help; so what have you done/tried so far? Can you post your script and tell us where you're stuck? Read the "Question Guidelines" link in my posting signature.

I'd suggest storing whatever you want to look for in an array, and loop through the input to match those strings.

slayer_1994 · 09-26-2017, 09:37 AM

Hi guys

I have created a script as shoown below:

Code:

df -H | grep -vE '^Filesystem|devtmpfs|tmpfs|esdamlinux|ccbtestnfs1' | awk '{ print $5 " " $1 }'

I know that what I have done above is filtering out the ones that I don't want but obviously this is quite a long winded approach, is there a quicker way?

Cheers

TenTenths · 09-26-2017, 10:12 AM

1. u50 is technically two file systems
2. Failing to see why you're not just listing the points you're interested in:

Code:

df -h /opt/ca /u01 /u50/CCBTEST_ARCHIVE /u50/CCBTEST | awk {'print $5" "$1'}

MadeInGermany · 09-26-2017, 11:52 AM

Or grep for /dev/ at the beginning

Code:

df -kP | grep '^/dev/'

The df -kP output is better for post processing.

slayer_1994 · 09-28-2017, 03:09 AM

Hi TenTenths

Great that is what I need. Thank you

Code:

[apm@ccbapprts1 ~]$ df -h /opt/ca | awk {'print $5" "$1'}
Use% Filesystem
3% /dev/mapper/rootvg-calv

Is there away to get rid of the output bringing the text Use% Filesystem

Cheers

TenTenths · 09-28-2017, 03:24 AM

Code:

| grep -v Filesystem

slayer_1994 · 09-28-2017, 03:33 AM

Great stuff!

Thank you so much