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Validating a file with checksum

add an mp3 audio track to a video

Recursive replace of directory and file names in the current directory.
This should work anywhere perl and grep is available. :P

Find all the links to a file
This command finds and prints all the symbolic and hard links to a file. Note that the file argument itself be a link and it will find the original file as well. You can also do this with the inode number for a file or directory by first using stat or ls or some other tool to get the number like so: $ stat -Lc %i file or $ ls -Hid file And then using: $ find -L / -inum INODE_NUMBER -exec ls -ld {} +

List upgrade-able packages on Ubuntu
Taken from apticron and modified.

Get the list of root nameservers for a given TLD

Rips CDs (Playstation, etc.) and names the files the same as the volume name

ROT13 using the tr command

Rsync between two servers
copying files from one server to another using rysnc. Root access need to be allowed on the destination.

convert unixtime to human-readable with awk
- convert unixtime to human-readable with awk - useful to read logfiles with unix-timestamps, f.e. squid-log: sudo tail -f /var/log/squid3/access.log | awk '{ print strftime("%c ", $1) $0; }


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