Check disk space

I am trying a script which will alert if disk space crosses some threshold, i googled it and got some scripts already, but they are not working with my server.

The problem is, my filesystem names are big, so the sizes are moving to the second line. just like below

any ideas? thanks in advance

user@host:/ta/folder/folder/tmp> df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/folder/folder/folder
                       18G  3.1G   14G  19% /
devtmpfs               32G  136K   32G   1% /dev
tmpfs                  32G     0   32G   0% /dev/shm
/dev/folder/folder      99M   50M   45M  53% /boot
/dev/folder/folder
                      4.0G  2.1G  1.7G  56% /tk

Searching these forums would have allowed you to at least find a starting point. However, try

$ awk 'NF<6 {getline y; $0=$0 FS y} {print $5}' file
Use%
19%
1%
0%
53%
56%

thanks for the help,
this i accomplished, but when the script triggers a mail, i want to include which is the filesystem crossed this space???

any ideas??

thanks in advance

Print 5th & 6th column

$ awk 'NF<6 {getline y; $0=$0 FS y} {print $5,$6}' file

# df -h | awk 'NF<6 {getline y; $0=$0 FS y} {print $5,$6}'
Use% Mounted
31% /usr/bin
31% /usr/lib
31% /
98% /cygdrive/a
98% /cygdrive/b
31% /cygdrive/c
98% /cygdrive/d
98% /cygdrive/n

My proposal was meant to be a starting point for you to help yourself, not a final solution to a problem that was only rudimentarily specified.

I just wrote something working... give comments to improve myself!!!

#!/usr/bin/bash

df -k | grep -v -i "use" > /tmp/disk_space$$
awk '{
        if (NF < 2)
        {
                print $0
        }
        }' /tmp/disk_space$$ >> /tmp/file_info01$$

awk '{
        if (NF==5)
        {
                used_size=substr($4,0,length($4)-1);
                print used_size;
        }
     }' /tmp/disk_space$$ >> /tmp/file_info02$$

paste /tmp/file_info01$$ /tmp/file_info02$$ > /tmp/file_info11$$

awk '{
        if (NF==6)
        {
                used_size=substr($5,0,length($5)-1);
                print $1,used_size
        }
     }' /tmp/disk_space$$ >> /tmp/file_info12$$

cat /tmp/file_info11$$ /tmp/file_info12$$ > /tmp/file_info$$

awk '{
        if ($2>50)
        {
                print "Disk running out of space ------> ",$1,"------> "$2,"%"
        }
    }' /tmp/file_info$$

rm /tmp/file_info11$$
rm /tmp/file_info12$$
rm /tmp/file_info$$
rm /tmp/disk_space$$

I'm not sure what you want to achieve with that many awk calls. Try to minimize those, and the costly fiddling with tmp files, almost everything can be done in one statement:

df -h|
awk  'NF<6 {getline y; $0=$0 FS y}
      NR>1 && $5+0>50 {print "disk running out of space:", $5, ": ", $6}
     '

could you please explain the above statement?

df -h|                                   # report file system disk space usage in human readable form
awk  'NF<6 {getline y; $0=$0 FS y}       # repair wrapped lines 
      NR>1 && $5+0>50                    # start with line 2: if field 5 (converted to number by +0) is greater than 50 (%) then...
      {print "di ... ce:", $5, ": ", $6} 
     '