Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium


permission problems

Posted on 2005-03-29
Medium Priority
Last Modified: 2013-12-16
All of a sudden we are having a permission problem on our Red Hat 7.2 server . When you log in through SSH you get the following message:

bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied

and some other programs seem to be affected as well. Any idea what could have caused this and where to start looking?


Question by:timothyking
LVL 17

Accepted Solution

owensleftfoot earned 200 total points
ID: 13657436
Somehow the permissions of /dev/null have been changed. "chmod 666 /dev/null" as root (without the qoutes) should fix it.
LVL 22

Expert Comment

ID: 13674989
the above information should correct the error reports.....but you need to check what commands are causing this, and why they have started occurring! Someone else could have been messing?

Files you initially need to look at are those that are run when you log in. These are normally:


Also, if this started out of the blue, consider whether your system may have been compromised in some way.


Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Using 'screen' for session sharing, The Simple Edition Step 1: user starts session with command: screen Step 2: other user (logged in with same user account) connects with command: screen -x Done. Both users are connected to the same CLI sessio…
It’s 2016. Password authentication should be dead — or at least close to dying. But, unfortunately, it has not traversed Quagga stage yet. Using password authentication is like laundering hotel guest linens with a washboard — it’s Passé.
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
Suggested Courses
Course of the Month11 days, 23 hours left to enroll

564 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question