There are many instances in life of sysadmin when his system starts throwing filesystem full events and its headache to search culprit. Here we are going to see command to search and display files with high utilization in a mount point. This is very useful to dig down and target exact huge/big files rather than wasting time in trimming/deleting small files.
For example if you are facing /tmp being full. Below is command to search for large files in given mount point. Here we are using du i.e. disk usage command then sorting the output list in reverse order so that highest size files comes to top. Then getting top 10 to display in result.
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# du -a /tmp | sort -nr | head -n 10
3396448 /tmp
1801984 /tmp/Acasrro411704
994848 /tmp/software.depot
81088 /tmp/PACPTHP_00001.depot
77088 /tmp/OraInstall2008-03-19_09-39-20AM
76912 /tmp/OraInstall2008-03-19_10-15-28AM
76848 /tmp/OraInstall2008-03-19_09-39-20AM/jre/1.4.2
76848 /tmp/OraInstall2008-03-19_09-39-20AM/jre
76656 /tmp/OraInstall2008-03-19_10-15-28AM/jre/1.4.2
76656 /tmp/OraInstall2008-03-19_10-15-28AM/jre
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Replace /tmp with mount point of your choice while running it in your system.
There are also different ways you can trace highest size hogger on mount point. Below are few
To find large file of size above 5000
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# find /var -xdev -size +5000
/var/opt/perf/datafiles/logglob
/var/opt/perf/datafiles/logproc
/var/opt/perf/datafiles/logdev
/var/opt/perf/datafiles/logtran
/var/opt/OV/log/SPISvcDisc/DBSPI_ORACLE_UNIX_discovery.trc
/var/opt/OV/log/osspi/osspi.log
----- output truncated -----
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Top 10 large directories in mount point
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# du -kx /var | sort -rn -k1 | head -n 10
6726048 /var
3962830 /var/opt
3471340 /var/opt/OV
2494362 /var/adm
2465390 /var/opt/OV/tmp
1512210 /var/opt/OV/tmp/OpC
1438642 /var/adm/openv/logs
1438642 /var/adm/openv
921030 /var/adm/sa
822672 /var/adm/openv/logs/bpdbm
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Top 10 large files in mount point
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# find /var -type f -xdev -print | xargs -e ll | sort -rn -k5 | head -n 10
-rw-rw---- 1 root bin 1463238440 Nov 1 14:45 /var/opt/OV/tmp/OpC/msgagtdf
-rw-rw-r-- 1 root bin 944541567 Nov 1 14:52 /var/opt/OV/tmp/sqlnet.log
-rw-rw-rw- 1 oracle92 dba 307369984 Mar 5 2014 /var/opt/omni/tmp/rcvcat21945.exp
-rw------- 1 root mail 187848937 Nov 1 14:01 /var/tmp/dead.letter
-rw-rw---- 1 root bin 84680704 Feb 16 2013 /var/opt/OV/tmp/OpC/msgagtdf-11975.gc
-rw-r--r-- 1 root bin 80937879 Nov 1 14:54 /var/opt/OV/log/osspi/osspi.log
-rwxrwxrwx 1 root users 58566204 Nov 1 14:55 /var/adm/rrdtool/apcrss32.rrd
-rw-rw-r-- 1 root bin 55159884 May 25 2009 /var/opt/OV/installation/temp/bbc/fx/upload/DeplM22799
-rw-rw-r-- 1 root bin 55159884 May 18 2009 /var/opt/OV/installation/temp/bbc/fx/upload/DeplM22011
-rw-rw-r-- 1 root bin 55159884 Jun 30 2010 /var/opt/OV/installation/temp/bbc/fx/upload/DeplM10143
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