Run commands after another
Ex.
mkdir temp & cd temp & ls
Run commands after another if the previous command SUCCEEDS
Ex.
mkdir temp && cd temp && ls
Run commands after another if the previous command FAILS
Ex.
mkdir temp || echo 'mkdir failed'
Category Archives: Linux - Page 2
Run multiple Linux commands, one after the other
Posted by Niklas
on October 19, 2020
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How to open multiple port forwards with one line using OpenSSH
Posted by Niklas
on July 3, 2019
No comments
The solution to this is so simple that I’m probably going to forget it in a couple of days 😉 Going to put it here for me to find next time I forget
Here it is:
ssh -N -L 12345:localhost:12345 -L 23456:localhost:23456 -L 34567:localhost:34567 user@server
This will setup 3 port forwards on localhost from server. Need more ports? just add another -L section and you are set
Tested on OpenSSH 7.8p1 and LibreSSL 2.6.2
My Play Framework Systemd script
Posted by Niklas
on December 27, 2018
No comments
Ubuntu deprecated Upstart so I had to turn to Systemd for my app controls in Ubuntu 18.04. In this script I set 2 environment variables (HOME and LANG), change directory to the app directory and starts the Play Framework application
# Myapp systemd script # # Location:/lib/systemd/system/myapp.service # # Useful commands: # # Start Myapp: systemctl start myapp.service # Stop Myapp: systemctl stop myapp.service # Restart Myapp: systemctl restart myapp.service # Show status: systemctl status myapp.service # Enable start on boot: systemctl enable myapp.service # Disable start on boot:systemctl disable myapp.service # # List all services running: systemctl # Check config: systemd-analyze verify myapp.service # #################################################################################### [Unit] Description=Job that runs my app daemon [Service] Type=forking Environment=HOME=/opt/myapp/app Environment=LANG=en_US.UTF-8 ExecStartPre=/bin/bash -c 'cd /opt/myapp/app' ExecStart=/bin/bash -c 'bin/myapp -J-Xms256M -J-Xmx768m -J-server -Dhttp.port=80 -Dconfig.file=conf/application.conf -Dlogger.file=conf/application-logger.xml' [Install] WantedBy=multi-user.target
The arguments for the Play service are what I normally use for AWS. You might need other settings
Tested on Ubuntu 18.04 and Play Framework 2.3
