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Check your internet connection by pinging Google
This is sample output - yours may be different.
0

ping -c 3 google.com

nicolasmccurdy · 2014-07-16 02:01:01 8
run logstash with docker

# Docker & logstash... and (free) multiple online services! Register on the following services & make a gist with your OWN settings, have fun to collect! OPTIONAL: -e LOGSTASH_CONFIG_URL=http://gist..... * [Papertrail](https://papertrailapp.com/?thank=7cfb38) * [Logentries](https://logentries.com/learnmore?code=c4TEpHn52LKeRN9Yb6Aku8XZQxfWUhws) * Make a log dir, like /log on your MAIN host like: `mkdir /log && ln -f /var/log/syslog /log/syslog` * Lets write som logs! * Write directly over tcp: `echo das | nc -v YOURHOST 555` * Lets scrap logs with logstash:`ln -f /var/log.... /log/syslog` * Write debug stuff: `echo blablalba > /log/das` ......
This is sample output - yours may be different.
0

docker run --name=logstash \ -p 9200:9200 -p 554:514/udp -p 555:514 \ -v /log:/log pblittle/docker-logstash

dbiesecke · 2014-11-06 23:58:24 8
Remove exited Docker containers
This is sample output - yours may be different.
0

docker rm $(docker ps -aqf status=exited)

nfvs · 2015-02-27 09:19:39 8
Make Ubuntu Phone root image read/write until reboot

Warning this will allow you to write to the system image on the phone, not recommended. But sometimes useful.
This is sample output - yours may be different.
0

sudo mount -o remount,rw /

bugmenot · 2016-02-07 17:57:19 13
sed 's:.*/::'

FQPN - Path = Filename
This is sample output - yours may be different.
0

Print everything after last slash

qdrizh · 2016-08-17 07:10:33 44
get video info, e.g. number of frames
This is sample output - yours may be different.
0

ffprobe -select_streams v -show_streams my-demo-video_cropped.mp4

ceddi · 2016-10-17 19:19:42 15

Simply clean playlist

Remove all line from a playlist m3u that not finish with MP3 or mp3 or wma or flac creating a new clean plalist m3u Show Sample Output

sed -e '/MP3$\|mp3$\|wma$\|flac$/!d' <filename_source> > <filename_destination>

vinabb · 2017-03-21 22:14:08 17

Parallel Apache Benchmark

(echo "https://example.com/"; echo "https://example.com/"; echo "https://example.com/"; echo "https://example.com/") | parallel -k 'ab -n 10000 -c 15 {}'
This is sample output - yours may be different.
0

cat url_list.txt | parallel -k 'ab -n 10000 -c 15 {}'

emphazer · 2018-05-17 11:23:28 207
Convert ip address in hexadecimal

Show Sample Output
This is sample output - yours may be different.
```
#  gethostip 208.69.34.230 -x
D04522E6
```
0

gethostip 208.69.34.230 -x

servermanaged · 2009-04-29 11:46:30 3

Simple read and write test with Iozone

Iozone with a file of 2GB, 64KB record size, write/rewrite and read/re-read test, using just one thread. Show Sample Output

iozone -s 2g -r 64 -i 0 -i 1 -t 1

w00binda · 2009-11-19 10:43:54 3

Find and replace recursivly a ignoring .svn
This is sample output - yours may be different.
0

find . -type f -not -regex ".*\/.svn\/.*" -exec sed -i 's/oldstring/newstring/g' {} +

binarysys · 2010-05-15 14:16:25 3
finding cr-lf files aka dos files with ^M characters

Where ^M is entered by ctrl-v-m (v then m). Especially useful on cygwin when checking into a version control system. If you're not using all cygwin tools (e.g. strawberry perl instead of cygwin perl) you'll find yourself dealing with this constantly. -U tells grep to process the file as binary; it needs this to work -I ignores binary files so you won't get false positives -l only prints the filename instead of the offending lines -r recursive
This is sample output - yours may be different.
0

grep -UIlr "^M" *

randy909 · 2010-08-20 21:16:34 3
Count files and folder
This is sample output - yours may be different.
0

ls /var/log/ |wc -l

schmiddim · 2010-11-25 20:02:04 22
Pass the proxy server address as a prefix to wget

On a machine behind a firewall, it's possible to pass the proxy server address in as a prefix to wget to avoid having to set it as an environment variable first.
This is sample output - yours may be different.
0

http_proxy=<proxy.server:port> wget <url>

rdc · 2011-03-30 13:06:19 3
Decode \x{ABCD}-style Unicode escape sequences

This is especially useful to get crazy stuff like space characters copied to your pasteboard correctly. Source: https://github.com/mathiasbynens/dotfiles/blob/master/.functions Show Sample Output
This is sample output - yours may be different.
```
$ unidecode "\x{1D306}"
&#119558;
$ unidecode "\x{00A9}\x{2122}\x{00AE}"
???
```
0

perl -e "binmode(STDOUT, ':utf8'); print \"$@\""; echo # newline

mathias · 2012-01-02 10:34:51 6
echo text in fancy manner

change the time that you would like to have as print interval and just use it to say whatever you want to Show Sample Output
This is sample output - yours may be different.
```
sayspeed "Who are you?"

Who are you?

----

sayspeed "Loading..."

Loading...
```
0

sayspeed() { for i in $(seq 1 `echo "$1"|wc -c`); do echo -n "`echo $1 |cut -c ${i}`"; sleep 0.1s; done; echo "";}

kundan · 2012-02-11 05:51:42 3
pdfappend: append multiple pdf files
This is sample output - yours may be different.
0

pdftk 1.pdf 2.pdf cat output 12.pdf

bossNova · 2012-03-28 15:38:34 3
restoring a directory from history

Revision: HEAD
This is sample output - yours may be different.
0

git checkout HEAD~2 -- /path/to/dir

evandrix · 2012-09-12 03:22:13 4
Take and post a screenshot in 3 seconds to imgur using scrot

That its my personal key that i dont use, if you want yours, go to imgur and get it, or use that one Show Sample Output
This is sample output - yours may be different.
```
scrot -d 3 '/tmp/%Y-%m-%d_$wx$h.png' -e 'cat $f'|curl -F "image=@-" -F "key=1913b4ac473c692372d108209958fd15" http://api.imgur.com/2/upload.xml|grep -Eo "<original>(.)*</original>" | grep -Eo "http://i.imgur.com/[^<]*"
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  138k    0   640  100  137k     72  16080  0:00:08  0:00:08 --:--:-- 17506
http://i.imgur.com/YBzHR.pn
```
0

scrot -d 3 '/tmp/%Y-%m-%d_$wx$h.png' -e 'cat $f'|curl -F "image=@-" -F "key=1913b4ac473c692372d108209958fd15" http://api.imgur.com/2/upload.xml|grep -Eo "<original>(.)*</original>" | grep -Eo "http://i.imgur.com/[^<]*"

dzup · 2012-11-13 21:16:09 7
Recursively search your directory tree files for a string
This is sample output - yours may be different.
0

alias gfind='find . -print0 | xargs -0 egrep -I '

pdunham · 2013-03-16 03:20:49 4
Install Ruby dependencies from a Gemfile without Bundler
This is sample output - yours may be different.
0

gem install -g

nicolasmccurdy · 2014-07-16 02:02:24 7
Find and delete all archives like file.ext.nco only if file.ext exists

Single file archives nested in subdirectories. After extracting them, you'll have the file (e.g. file.ext) and the archive (e.g. file.ext.nco) side by side. Sometimes you'll only have the archive (if you didn't extract them, or if there was an error during extraction). Only delete the archive if the single file is present in the same directory. Show Sample Output
This is sample output - yours may be different.
```
removed './abc.JPG.nco'
removed './file.ext.nco'
```
0

find . -type f ! -iname "*.nco" -execdir bash -c ' if [ -f "{}.nco" ]; then rm -v "{}.nco"; fi' \;

tralston · 2015-06-28 20:38:08 11
Force laptop "idle" mode action when laptop lid is closed

Force computer "idle" state when lid is closed, regardless of inhibitors (power manager) in place, and runs logind preset action (sleep, suspend...). See http://www.freedesktop.org/software/systemd/man/logind.conf.html
This is sample output - yours may be different.
0

echo 'LidSwitchIgnoreInhibited=no' > /etc/systemd/logind.conf.d/respect-inhibit-lid.conf

lolssl · 2015-10-01 17:20:26 12
Switch to rc-proposed channel on Ubuntu Phone - Nexus 4

Get the latest and hopefully greatest to test out on the Ubuntu Phone - sometimes broken but always interesting. https://developer.ubuntu.com/en/start/ubuntu-for-devices/image-channels/
This is sample output - yours may be different.
0

sudo system-image-cli --switch ubuntu-touch/rc-proposed/ubuntu --build 0

bugmenot · 2016-02-07 18:24:28 9
extract images from video with framerate r
This is sample output - yours may be different.
0

ffmpeg -i my-demo-video_cropped.mp4 -r 15/1 pic%03d.png

ceddi · 2016-10-17 19:25:55 17
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Extract audio from Mythtv recording to Rockbox iPod using ffmpeg

There are some pretty good live performances on late night TV. With Mythtv I record David Letterman, Jimmy Fallon, and Conan nightly all in HD from over the air broadcasts. If I find a live performance I like I copy it to my Rockboxed iPod using this command. The Rockbox firmware knows how to downmix 5.1 audio. The command above extracts the audio from the video starting at 58 minutes and 15 seconds. It ends at the end of the file since this was the last performance of the recording. The command creates an ac3 file. I copy the ac3 file to my Rockbox iPod and rock on.

Matrix Style

mean color of an image

You can get the mean value for the colours in an image. Then you can determine, in general, how dark or bright is the image and run some other actions based on that. I'll recommend to readjust the brightness of the images using +sigmoidal-contrast option of imagemagick convert command.

Convert one file from ISO-8859-1 to UTF-8.

Nothing fancy it just converts one file from one character encoding into another one.

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

exec chmod to subfiles

Using `-exec cmd {} +` causes find to build the command using all matching filenames before execution, rather than once per file.

Do some learning...

no loop, only one call of grep, scrollable ("less is more", more or less...)

Start dd and show progress every X seconds

Adjust "sleep X" to your needs. *NOTE: First sleep is required because bash doesn't have a "post-test" syntax (do XXX while).

Reload all sysctl variables without reboot

Use `sysctl -p` without argument will only load /etc/sysctl.conf, but user configs always put in /etc/sysctl.d/*.conf, `sysctl --system` will load all the config files

random xkcd comic as xml

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