How to stop Jenkins CI build by extract a value from a JSON endpoint in bash using Curl

Curl the URL to get the JSON response and pipe it to the python tool. The python code will extract the value mapped to the given key (number in this case).

machine='dbelab04'
machineport=8080
jobname='mkat_fpga_tests_4k'
buildnumber=$(curl --silent -X POST http://$machine:$machineport/job/$jobname/lastBuild/api/json?tree=number | python -c 'import json,sys;obj=json.load(sys.stdin);print obj["'number'"]';)
curl -X POST http://$machine:$machineport/job/$jobname/$number/stop

Note: the above command actually works

System V init script(start-stop-daemon)

I’ve been looking for efficient ways to start at boot my NodeJS dependent applications, with inspiration from https://gist.github.com/alobato/1968852, I modified it to my own needs.

Link might interest you as well:
http://big-elephants.com/2013-01/writing-your-own-init-scripts/
https://www.cyberciti.biz/tips/linux-write-sys-v-init-script-to-start-stop-service.html

Copy template to /etc/init.d and rename it to something meaningful. Then edit the script and enter that name after Provides:(between ### BEGIN INIT INFO and ### END INIT INFO).

#!/bin/bash
# Inspired by https://gist.github.com/alobato/1968852
# Needs Provides, Descriptions

### BEGIN INIT INFO
# Provides:
# Required-Start: $all
# Required-Stop: $all
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description:
# Description:
### END INIT INFO

set -e
NAME=""
PIDFILE="/run/$NAME/$NAME.pid"
# Application one wants to upstart
DAEMON=""
DAEMON_OPTS=""
# Run as user
RUN_USER=""
RUN_GROUP=""
function daemon_run {
	mkdir -p /run/$NAME
	chown $RUN_USER:$RUN_GROUP /run/$NAME
	start-stop-daemon --start --background --quiet --chuid $RUN_USER:$RUN_GROUP --chdir /run/$NAME --pidfile $PIDFILE --make-pidfile --exec $DAEMON $DAEMON_OPTS
}
exec > /var/log/$NAME.log 2>&1

case "$1" in
start)
	echo -n "Starting $NAME ... "
	daemon_run
	echo "done."
;;

silent)
	echo -n "Starting $NAME in silent mode ... "
	daemon_run
	echo "done."
;;

stop)
	echo -n "Stopping $NAME ... "
	start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE --remove-pidfile
	echo "done."
;;
restart|force-reload)
	echo -n "Restarting $NAME ... "
	start-stop-daemon --stop --quiet --oknodo --retry 30 --pidfile $PIDFILE --remove-pidfile
	alexa_run
	echo "done."
;;
*)
	echo "Usage: $0 {start|stop|restart}"
exit 1
esac
exit 0

When done,

sudo systemctl enable 'name_of_filename'
reboot

Mpho

Move files by date into different directory using CLI

A while back I was unfortunate in such a way that my HDD that I primarily use as photo archive started having mechanical issues, and before It died on my arms I had the opportunity to backup most of my pictures, however most of them were truncated and had to be discarded and the ones I could recover their filenames where overwritten with random filenames and ascii codes.

For over a while I have neglected my pictures and they just piled up in a single and nameless directory, until I took it against myself to clean them up.

And one of the benefits of using Linux OS is the scripting features.

for i in *; 
do d=$(exiftool $i | grep 'Date/Time Original' | cut -f 17 -d ' '); 
newd=`echo ${d//:/-}`; 
echo $i ${newd} ;
mkdir -p ${newd}; 
mv -- ${i} ${newd}; 
done
  1. write this script to a file named mvByDate.sh in your old directory.
  2. replace the /your/new/directory with your new directory’s path
  3. make this file executable with chmod +x mvByDate.sh
  4. then execute this file by ./mvByDate.sh
  5. voila