Master Linux Symbolic Links: Types, Creation, Deletion, and a Bash Script to List Targets

What is a Symbolic Link?

A symbolic (soft) link is a special file that points to another file or directory anywhere in the filesystem, acting as a shortcut.

Types of Links

Hard link : Direct pointer to a file's inode; can only be created within the same filesystem.

Soft link (symbolic link): An indirect reference that can reside on any filesystem and can point to files on different filesystems.

Creating Symbolic Links

The ln command creates links. Without options it creates a hard link; to create a soft link, add the -s flag.

ln [OPTIONS]

ln -s [OPTION]

Example – create a soft link to a file:

[root@localhost ~]# ln -s /var/log/audit/audit.log ~/audit.log

Example – create a soft link to a directory:

[root@localhost ~]# ln -s /var/log ~/log

Removing Symbolic Links

Use the unlink command followed by the link path.

[root@localhost ~]# unlink ~/log

Getting the Target of a Symbolic Link

The readlink command prints the path that a symbolic link points to.

[root@localhost ~]# readlink ~/audit.log
/var/log/audit/audit.log

Bash Script to List All Symbolic Links and Their Targets

The script prompts for a directory, scans it for symlinks, and displays each link with its resolved target.

#!/bin/bash
read -p "Provide the directory to evaluate: " target_dir
cd $target_dir
links=$(find . -maxdepth 1 -type l -ls | awk '{print $11}')
for link in $links
do
    echo "$link -> $(readlink $link)"
done

Sample output when evaluating /etc:

[root@localhost ~]# ./symlink.sh
Provide the directory to evaluate: /etc
./rc.local -> rc.d/rc.local
./redhat-release -> centos-release
./system-release -> centos-release
./init.d -> rc.d/init.d
./rc0.d -> rc.d/rc0.d
... (additional entries) ...

Conclusion

The article covered the basics of Linux symbolic links, demonstrated how to create and delete them, showed how to retrieve their targets, and provided a reusable Bash script for enumerating all symlinks in a given directory.