Example 1: Sum the file size.
Suppose there is a file named “dir_list” containing lines like :
-rwxr-xr-x 1 test deba 3139 Apr 29 2013 BINARY_LIST*
-rw-r--r-- 1 test deba 4078 Apr 29 2013 BINARY_CKSUM_002
-rw-r--r-- 1 test deba 5343 Apr 29 2013 CONFIG_CKSUM_002
-rw-r--r-- 1 test deba 4078 Apr 29 2013 BINARY_CKSUM_03
-rw-r--r-- 1 test deba 5288 Apr 29 2013 CONFIG_CKSUM_03
-rw-r--r-- 1 test deba 70 Apr 29 2013 BINARY_DIFF_002_03
-rw-r--r-- 1 test deba 439 Apr 29 2013 CONFIG_DIFF_002_03
-rwxr-xr-x 3 test deba 512 Oct 8 15:48 TOKENIZER/
-rwxr-xr-x 5 test deba 512 Nov 27 09:57 TEST/
-rw-r--r-- 1 test deba 0 Dec 3 19:44 dir_list
Suppose you want to sum the size of the files :
awk '{a+=$5} END{print "Total",a}' dir_list
o/p: Total 23459
"a" is a variable.
$5 is the 5th column
Example 2: Check directory usage and send email.
Suppose you want to write a small script to check the directory size of “var” and if it is more than 60% raise an alert -
Current State :
a) Check with df -k
Filesystem 1024-blocks Free %Used Iused %Iused Mounted on
/dev/hd4 65536 24052 64% 3116 10% /
/dev/hd2 3604480 574392 85% 65807 8% /usr
/dev/hd9var 1376256 552436 60% 19949 6% /var
/dev/hd3 983040 177612 82% 7661 4% /tmp
/dev/hd1 2031616 42080 98% 35577 8% /home
/dev/lv00 393216 298668 25% 43 1% /usr/sys/inst.images
/dev/lv01 851968 154724 82% 11666 6% /opt
/dev/igwlv 5111808 2025048 61% 30169 3% /igw
/dev/lv04 1048576 202256 81% 23799 10% /var_app_temp
/dev/lv02 2621440 396772 85% 4757 1% /opt/webMethods
/proc - - - - - /proc
/dev/lv06 8388608 7015624 17% 33083 2% /var/app
/dev/lv07 1048576 575392 46% 1535 1% /var/app/temp
/dev/lv05 2097152 452448 79% 170674 33% /work
/dev/lv08 393216 53312 87% 6476 7% /home_d01
/dev/syduigd03_lv 65536 47820 28% 1911 16% /syduigd03
/dev/sh_MQ 458752 243400 47% 1731 2% /MQHA
/dev/sh_app 8388608 1320016 85% 26777 2% /var_app2
/dev/sh_app_temp 1572864 615364 61% 22202 6% /var_app_temp2
b) Filter out the "var/" using grep.
df -k|grep "/var"
c) Remove the directory which you do not want :
df -k|grep "/var"|grep -v "_"|grep -v "app"
d) Take just the 4th column containing size :
df -k|grep "/var"|grep -v "_"|grep -v "app"|awk '{print $4}'
e) Remove the "%" sign
df -k|grep "/var"|grep -v "_"|grep -v "app"|awk '{print $4}'|tr -d %
f) Store it in a variable :
VAR_USAGE=`df -k|grep "/var"|grep -v "_"|grep -v "app"|awk '{print $4}'|tr -d %`
g)Check the size :
echo $VAR_USAGE
h) send an email :
if [ "$VAR_USAGE" -gt "85" ] ;
then
echo "USAGE HIGH" | mailx -s "VAR_USAGE in $SERVER_NAME is $VAR_USAGE%" \
<email id>
fi
