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Converts to PDF all the OpenOffice.org files in the directory
Requieres unoconv (debian package)

Rot13 using the tr command
rot13 maps a..mn..z (A..MN..Z) to n..za..m (n..za..m) and so does this alias.

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

View a man page on a nice interface
A great way of viewing some man page while using gnome.

Scan all open ports without any required program

Hex math with bc
To do hex to binary: echo 'ibase=16; obase=2; 16*16' | bc # prints: 111100100 To do 16*16 from decimal to hex: echo 'ibase=10; obase=16; 16*16' | bc # prints: 100 You get the idea... Alternatively, run bc in interactive mode (see man page)

Print the IPv4 address of a given interface

output stats from a running dd command to see its progress
if you start a large dd and forgot about statistics, but you still wonder what the progress is this command in an OTHER terminal will show you the way. NOTE: the watch command by itself will not output anything NOTE: the kill command will not kill the process

Recursively remove .svn directories from a local repository

reverse order of file


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