Useful UNIX Commands

1). To find the top 10 larger files in the Directory,
$ls -lrt | awk '{print $5,$9}' | sort -nr head | xargs ls -lrt

2) To find the access and Modification details of a file
$istat
*This command is available for AIX only

3).To remove file which are older then say 7 days
$find . -mtime +7 -exec rm {} \;

4). Locate Files that Contain Certain Strings

$ find . -print | xargs grep -i v\$dba_objects

5) To Delete top 10 huge files in directory,

Use,

$du -sk | sort -nr | head | awk '{print $2}' | xargs rm -r