Commands by mrttlemonde

Commands by mrttlemonde (10)

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Simple calculus

Exit with empty line
This is sample output - yours may be different.
-7

read c; while [ -n "$c" ]; do clear; echo -e "$c = "$(echo "$c" |bc -l)"\n"; read c; done

mrttlemonde · 2011-11-13 10:28:40 10
Execute external code

Useful command to avoid unreadble script in a single file...
This is sample output - yours may be different.
-4

source filename_script.sh

mrttlemonde · 2010-05-14 15:14:25 10
killall -r ".*my-process.*"
This is sample output - yours may be different.
4

Kill all process using regular expression (-r option)

mrttlemonde · 2010-05-14 15:07:12 4
Audible warning when a downloading is finished

This command can be set as an alias in ~/.bashrc For example (in my case) I have : alias watchDl='while [ "$(ls $filePart)" != "" ]; do sleep 5; done; mpg123 /home/.../warning.mp3" ' Then I just need to - initialize filePart (e.g. filePart="*bigFile*rar.part") - launch watchDl
This is sample output - yours may be different.
1

while [ "$(ls $filePart)" != "" ]; do sleep 5; done; mpg123 /home/.../warning.mp3

mrttlemonde · 2009-12-06 10:55:09 10
Extract neatly a rar compressed file

It's also possible to delay the extraction (echo "unrar e ... fi" |at now+20 minutes) wich is really convenient!
This is sample output - yours may be different.
4

unrar e file.part1.rar; if [ $? -eq 0 ]; then rm file.part*.rar; fi

mrttlemonde · 2009-06-13 11:11:43 7
A very simple and useful stopwatch

time read -sn1 (s:silent, n:number of characters. Press any character to stop)
This is sample output - yours may be different.
168

time read (ctrl-d to stop)

mrttlemonde · 2009-03-20 22:50:06 55
Clear the terminal screen
This is sample output - yours may be different.
192

ctrl-l

mrttlemonde · 2009-03-18 17:38:49 737
Decreasing the cdrom device speed

Decreasing the cdrom device speed may be more comfortable to watch films (for example)
This is sample output - yours may be different.
8

eject -x 4

mrttlemonde · 2009-03-18 16:25:11 6
Doing some floating point calculations with rounding (e.g. at the 3rd decimal)
This is sample output - yours may be different.
1

echo '123/7' |bc -l |xargs printf "%.3f\n"

mrttlemonde · 2009-03-18 14:20:32 5
Copy the text from the 3rd line to the 9th line into a new file with VI
This is sample output - yours may be different.
2

:3,9w new_file

mrttlemonde · 2009-03-08 09:26:17 11

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Get absolut path to your bash-script

Another way of doing it that's a bit clearer. I'm a fan of readable code.

backup and remove files with access time older than 5 days.

create an archive of files with access time older than 5 days, and remove original files.

Touch a file using a timestamp embedded in the file name.

tstouch takes two arguments: a filename containing a timestamp, and an extended regular expression with the parenthesized section matching a timestamp of the form YYYYMMDDhhmm or YYYYMMDDhhmm.ss. It then touches the file with that timestamp.

show installed but unused linux headers, image, or modules

will show: installed linux headers, image, or modules: /^ii/!d avoiding current kernel: /'"$(uname -r | sed "s/$.*$-$[^0-9]\+$/\1/")"'/d only application names: s/^[^ ]* [^ ]* $[^ ]*$.*/\1/ avoiding stuff without a version number: /[0-9]/!d

Get OSX Battery percentage

adjusting the field "f1" will give you additional information such as f1 = 98% f2 = discharging f3 = 2:02 remaining

uniq for unsorted data

Multi-segment file downloading with lftp

This is for files only, for directories 'mirror' has to be used.

analyze traffic remotely over ssh w/ wireshark

When using tcpdump, specify -U option to prevent buffering.

List just the executable files (or directories) in current directory

A bit shorter ;)

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" }

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