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I want from the output below grab all the volume names that have a capacity over 85%. I know that there isn't one in ths example but lets pretend there is. :)

Filesystem               total       used      avail capacity  Mounted on
/vol/mc3240a/            190GB       18GB      171GB      10%  /vol/mc3240a/
/vol/mc3240a/.snapshot       10GB      355MB     9884MB       3%  /vol/mc3240a/.snapshot
/vol/mc3240b_root_backup/      210GB     9019MB      201GB       4%  /vol/mc3240b_root_backup/
/vol/mc3240b_root_backup/.snapshot        0MB     1691MB        0MB     ---%  /vol/mc3240b_root_backup/.snapshot
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What have you tried? –  Wilf Feb 18 at 12:46
To clarify, I want to grab the name, mc3240a, not the entire row –  Jocke Feb 18 at 12:51
errr... I would use df -hx tmpfs -x devtmpfs or something as the input... –  Wilf Feb 18 at 12:58

4 Answers 4

up vote 2 down vote accepted
df -h | egrep "(8[5-9]|9[0-9]|100)%" | cut -f 1 -d " "
  • This will catch 85% up to 100% (the 0, does the {1}00%)
  • The cut will show the 1st column (anything after the 1st space in the output is deleted; a device can not have a space)


Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             139G  132G  218M 100% /
varrun                2.0G  368K  2.0G   1% /var/run
varlock               2.0G     0  2.0G   0% /var/lock
udev                  2.0G   48K  2.0G   1% /dev
devshm                2.0G     0  2.0G   0% /dev/shm

$ df -h | egrep "(8[5-9]|9[0-9]|100)%" | cut -f 1 -d " "

Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             144G  130G  7.5G  95% /
varrun                506M  148K  506M   1% /var/run
varlock               506M  4.0K  506M   1% /var/lock
udev                  506M   72K  506M   1% /dev
devshm                506M     0  506M   0% /dev/shm
$ df -h | egrep "(8[5-9]|9[0-9]|100)%" | cut -f 1 -d " "
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but it does not catch 90...?! –  Wolfgang Vogl Feb 18 at 13:05
but it catchs 81%, too –  Wolfgang Vogl Feb 18 at 13:13
now, after editing this will do the job :D –  Wolfgang Vogl Feb 18 at 13:32
@WolfgangVogl we almost got 3x the same answer now :D funny –  Rinzwind Feb 18 at 13:34
Thx, this helped alot @Rinzwind . made a little modification ssh root@hostname 'df -h' | egrep "(8[5-9]|9[0-9]|100)%" | cut -f 3 -d "/" –  Jocke Feb 18 at 13:51

Try this (put it into a script, make it executable):




tring='first line
second line
third line'

oldIFS="$IFS"   # store old IFS value
IFS=${IFS:0:1} # tab formatting
lines=( $DF_OUT )

IFS=', '

for line in "${lines[@]}"
        if [  $COUNTER -gt 0 ]; then    # strip first line
            fields=( $line )
            if [[ ${fields[4]} =~ (8[5-9]|[9][0-9]|100)%$ ]]; then
                echo "==> $line"
        let COUNTER=COUNTER+1 


exit 0

Not as short as the answers above but it catches 85% to 100% in the right row...

or: SHORT one-line:

df -hx tmpfs -x devtmpfs | egrep '(8[5-9]|9[0-9]|100)%'

(edited Wilfs version) just like the other's solution but using egrep with alternatives)

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Damn - I thought I could of done it as one-liner... Brilliant +1. –  Wilf Feb 18 at 13:12
I like the one liner but I expect you need to cut the output to only show the device ;) –  Rinzwind Feb 18 at 13:16
What about df -hx tmpfs -x devtmpfs | egrep '(8[5-9]|9[0-9]|100)%' | cut -f 1 -d " " | sed -e 's/\/vol\///g'? –  Wilf Feb 18 at 13:26

Like the other ones, but in a script to make sure it is all grabbed:

#For 85% to 89%, and 95& to 99%
df -hx tmpfs -x devtmpfs | egrep '[8-9][5-9]%'
#To find if anything is 90%-94%
df -hx tmpfs -x devtmpfs | egrep '9[0-4]%'
#To find if anything is 100%
df -hx tmpfs -x devtmpfs | egrep '100%'

Sample input (tmpfs etc filtered out):

wilf@comp:~$ df -hx tmpfs -x devtmpfs
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda2        96G   21G   71G  23% /
/dev/sda3        58G   43G   12G  79% /home
/dev/sda5       357G  335G  4.2G  99% /run/media/wilf/Storage
/dev/sda6        27G   19G  6.8G  74% /run/media/wilf/433b971a

Sample output - with drive name with other stuff as I have not filtered that out:

wilf@comp:~$ ./testScript
/dev/sda5       357G  335G  4.2G  99% /run/media/wilf/Storage

Based @wolfgang 's , this should should print out just the drive name without the /vol:

df -hx tmpfs -x devtmpfs | egrep '(8[5-9]|9[0-9]|100)%' | cut -f 1 -d " " | sed -e 's/\/vol\///g'
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yep, simplest (and i think best) is yours @Wilf - just use the alternative selection and all's done! –  Wolfgang Vogl Feb 18 at 13:15
@WolfgangVogl - Your one-liner is better :D –  Wilf Feb 18 at 13:15
@wilf in the end we all end up with the same line. Now what :D :D –  Rinzwind Feb 18 at 13:19
@Rinzwind - Dunno :) –  Wilf Feb 18 at 13:20
@wilf you are forgetting to cut the result.OP wants device only ;) –  Rinzwind Feb 18 at 13:20

Suppose you are using commnad say xyz to get this output then

xyz | grep "[8-9][5-9]%"

should give you proper output

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To clarify, I want to grab the name, mc3240a, not the entire row –  Jocke Feb 18 at 12:51
That will be little tricky, I think... –  Null pointer Feb 18 at 12:54
I may be wrong, but wouldn't those not list numbers like 92%, as the second number is below 5? Same for @Rinzwind –  Wilf Feb 18 at 12:59
think we got enough correct answers - but this one gives not 90 to 94 and 100 as you already told Wilf... –  Wolfgang Vogl Feb 18 at 13:29

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