Archive for Linux

Security to Ssh service

Change SSH listening port SSH listens for connections on port 22. Attackers use port scanner software to see whether hosts are running an SSH service. It’s wise to change the SSH port to a number higher than 1024 because most port scanners (including nmap) by default don’t scan high ports.

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Superblock: How to recover damaged

If a filesystem check fails and returns the error message “Damaged Superblock” Solution: There are backups of the superblock located on several positions and we can restore them with a simple command. Backup locations are: 8193, 32768, 98304, 163840, 229376 and 294912. ( 8193 in many cases only on older systems, 32768 is the most […]

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The email tell to change from the folders with Procmail and Spamassassin

It’s a help from Procmail You can filter your mail so, that spam you don’t even get, when you check your mail.

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