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Concatenate (join) video files
Use mencoder to concatenate (join) multiple video files together.

attach to bash shell in the last container you started

Transfer Entire recursive from one host to another. Only copies files that are newer or do not exist
From opposite host To copy remote to local rsync -aE -e "ssh -pPortnumber" user@hostA:directory target_dir

print offsets of file disk for losetup/loop-mount
If you want to mount partitions of an disk image, you need the offsets and sizes of the partitions. This command prints them in the format that losetup understands.

Detect encoding of a text file
This command gives you the charset of a text file, which would be handy if you have no idea of the encoding.

uniq without pre-sorting
Reads stdin, and outputs each line only once - without sorting ahead of time. This does use more memory than your system's sort utility.

Simple addicting bash game.
hold period (or whatever character) and hit enter after a second. You need to make the next line of periods the same length as the previous line... score starts at 0 and increase each time length of line is same.

Check if the Debian package was used since its installation/upgrade.
This script compares the modification date of /var/lib/dpkg/info/${package}.list and all the files mentioned there. It could be wrong on noatime partitions. Here is non-oneliner: #!/bin/sh package=$1; list=/var/lib/dpkg/info/${package}.list; inst=$(stat "$list" -c %X); cat $list | ( while read file; do if [ -f "$file" ]; then acc=$(stat "$file" -c %X); if [ $inst -lt $acc ]; then echo used $file exit 0 fi; fi; done exit 1 )

Send a local file via email
Send it the easy way, with MIME and everything handled for you by an app that knows best.

Show line numbers in a text file


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