− | The format of tty id is <code>tty[''rdev'':''dev'']</code>. Why can we not use a pair of <code>mnt_id</code> and <code>inode</code> here? | + | The format of tty id is <code>tty[''rdev'':''dev'']</code>. Note that a pair of <code>''mnt_id'':''inode''</code> is not used here, as there can be two device files with the same <code>''rdev''</code> but different inode numbers. |