Linux Link Commands
Creating links is a kind of shortcut to access a file. Links allow more than one file name to refer to the same file.
There are two types of links :
- Hard Link
- Soft Link or Symbolic links
Hard Link
A hard link is one most power full links in the Linux system when we create a hard link to the file and then delete the file, we can still access the file using the hard link.
syntax : ln file_name link_name
Eg: ln ramkumar.txt ram
[oracle@oracletest scripts]$ ls -l total 24 -rwxrwxrwx. 1 oracle oracle 42 Oct 21 01:49 ramkumar.txt -rwxrwxr-x. 1 oracle oracle 1291 Oct 20 23:47 rman_bkp.sh -rw-rw-r--. 1 oracle oracle 6979 Oct 20 23:48 rman.log -rwxr--r--. 1 oracle oinstall 515 Sep 9 14:45 setEnv.sh -rwxr--r--. 1 oracle oinstall 134 Sep 7 10:54 stop_all.sh [oracle@oracletest scripts]$ ln ramkumar.txt ram [oracle@oracletest scripts]$ ls -l total 28 -rwxrwxrwx. 2 oracle oracle 42 Oct 21 01:49 ram -rwxrwxrwx. 2 oracle oracle 42 Oct 21 01:49 ramkumar.txt -rwxrwxr-x. 1 oracle oracle 1291 Oct 20 23:47 rman_bkp.sh -rw-rw-r--. 1 oracle oracle 6979 Oct 20 23:48 rman.log -rwxr--r--. 1 oracle oinstall 515 Sep 9 14:45 setEnv.sh -rwxr--r--. 1 oracle oinstall 134 Sep 7 10:54 stop_all.sh [oracle@oracletest scripts]$ cat ram HI Hello welcome to linux basic commands [oracle@oracletest scripts]$ rm -rf ramkumar.txt [oracle@oracletest scripts]$ ls -l total 24 -rwxrwxrwx. 1 oracle oracle 42 Oct 21 01:49 ram -rwxrwxr-x. 1 oracle oracle 1291 Oct 20 23:47 rman_bkp.sh -rw-rw-r--. 1 oracle oracle 6979 Oct 20 23:48 rman.log -rwxr--r--. 1 oracle oinstall 515 Sep 9 14:45 setEnv.sh -rwxr--r--. 1 oracle oinstall 134 Sep 7 10:54 stop_all.sh [oracle@oracletest scripts]$ cat ram HI Hello welcome to linux basic commands
Soft Link or Symbolic links
Soft link is another variety type of Linux link, But if we create a soft link of the file and then delete the file, we can’t access the file through the soft link, and the soft link becomes dangling
Syntax: ln -s file_name link_name
Eg: ln -s ramkumar.txt ram
Eg: ls -s sample.txt kar [oracle@oracletest scripts]$ ln -s sample.txt kar [oracle@oracletest scripts]$ ls -l total 28 lrwxrwxrwx. 1 oracle oracle 9 Oct 21 23:12 ram -> sample.txt -rw-rw-r--. 1 oracle oracle 49 Oct 21 23:12 ramkumar.txt -rwxrwxrwx. 1 oracle oracle 42 Oct 21 01:49 ram -rwxrwxr-x. 1 oracle oracle 1291 Oct 20 23:47 rman_bkp.sh -rw-rw-r--. 1 oracle oracle 6979 Oct 20 23:48 rman.log -rwxr--r--. 1 oracle oinstall 515 Sep 9 14:45 setEnv.sh -rwxr--r--. 1 oracle oinstall 134 Sep 7 10:54 stop_all.sh [oracle@oracletest scripts]$ cat ram Good morning How are you all Take care Bye Bye ! [oracle@oracletest scripts]$ rm -rf sample.txt [oracle@oracletest scripts]$ ls -l total 24 lrwxrwxrwx. 1 oracle oracle 9 Oct 21 23:12 ram -> sample.txt -rwxrwxrwx. 1 oracle oracle 42 Oct 21 01:49 ram -rwxrwxr-x. 1 oracle oracle 1291 Oct 20 23:47 rman_bkp.sh -rw-rw-r--. 1 oracle oracle 6979 Oct 20 23:48 rman.log -rwxr--r--. 1 oracle oinstall 515 Sep 9 14:45 setEnv.sh -rwxr--r--. 1 oracle oinstall 134 Sep 7 10:54 stop_all.sh [oracle@oracletest scripts]$ cat ram cat: ram: No such file or directory
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