Symbolic linked files are commonly used in Linux system. For example some service inital scripts are stored in /etc/init.d and linked to /etc/rc0.d, /etc/rc1.d, /etc/rc2.d, /etc/rc3.d, /etc/rc4.d, /etc/rc5.d and /etc/rc6.d, so that the system is able to control related services in different runlevel.
But sometimes if the symlink files got broken, how can we find the dead ones out?
Here’s a simple script does the work well:
[planet@admon ~]$ cat check-dead-softlink.sh
[planet@admon ~]$ cat check-dead-softlink.sh
#!/bin/bash
#
# joseph from http://planet.admon.org
# This script is intended to find broken symlinks for
# a list of specified directories.
[ $# -eq 0 ] && directorys=`pwd` || directorys=$@
linkchk()
{
for file in $1/*
do
[ -L "$file" -a ! -e "$file" ] && echo "$file"
[ -d "$file" ]&&linkchk $file
done
}
for directory in $directorys
do
[ -d $directory ] && linkchk $directory
else
echo "$directory is not a directory, request ignored!"
echo "Usage: $0 dir1 dir2 dir3 ..."
fi
done
exit 0
The output from an examining case:
[planet@admon ~]$ cd shell/ [planet@admon shell]$ ls -l symbol lrwxrwxrwx 1 root root 28 Oct 10 15:19 symbol -> /home/oracle/hldataadmin.dmp [planet@admon shell]$ cat symbol cat: symbol: No such file or directory [planet@admon shell]$ cd .. [planet@admon ~]$ ./check-dead-softlink.sh shell "shell/symbol"
If you face any issues on this script, please dont hesitate to create a post here at Linux Scripting at Forum.Admon.org
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