One my user leaves the office and I’d like to disable her access to our UNIX / Linux system. How do I delete ssh key from the UNIX systems so that user can not log in?
Q. Is There a UNIX / Linux unerase or undelete command? How do I undelete files under a UNIX / Linux system?
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Q. I’m getting following error on my Debian Linux system:
mv cannot move /etc/resolv.conf.dhclient-new to /etc/resolv.conf: Operation not permitted
How do I replace a string with another string in all files? For example, ~/foo directory has 100s of text file and I’d like to find out xyz string and replace with abc. I’d like to use sed or any other tool to replace all occurrence of the word.