Commands by buergi (0)

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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" }

aplay some whitenoise
Plays whitenoise from /dev/urandom.

ASCII webcam live stream video using mplayer
Mplayer starts a webcam capture using ASCII art. Only mplayer required

Number of CPU's in a system
/proc/cpuinfo contains information about the CPU. Search for "processor" in the /proc/cpuinfo file wc -l, counts the number of lines.

journalctl -f
a tail -f variant of systemd journal. Follow the most recent updates or if events are appended to the journal

Get full directory path of a script regardless of where it is run from
Also resolves symlinks, showing the full path of the link target

List bash functions defined in .bash_profile or .bashrc

small CPU benchmark with PI, bc and time.
$ # 4 cores with 2500 pi digits $ CPUBENCH 4 2500 $. $ every core will use 100% cpu and you can see how fast they calculate it. $ if you do 50000 digitits and more it can take hours or days

get a rough estimate about how much disk space is used by all the currently installed debian packages
The vaule is expressed in megabytes

list offsets from HEAD with git log.


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