/dev/null: Permission Denied

bash: /dev/null: Permission Denied

Issue:
*****

When a new user account is created, you may find that on login you receive the
following error:

~~~~~~~~~
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
~~~~~~~~~

Solution:
*********

/dev/null or the null device is a special file that discards all data written to it (but reports that the write operation succeeded) and provides no data to any process that reads from it. This is a character special device which should have read+write permissions for everybody.

Following command checks the current permission for /dev/null.

=====
ls -l /dev/null
=====

Permission for “/dev/null” file:

===========
crw-rw-rw- 1 root root 1, 3 Aug 11 00:45 /dev/null
===========

If the output doesn’t show the permissions crw-rw-rw- then change them accordingly using the commands given below.

=======
chmod 666 /dev/null
mknod /dev/null c 1 3
=======

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