Linux scripts for system administration

Some scripts for Linux system administration tasks

This repository contains a number of scripts used on Ubuntu to easy some system administrations tasks. Most scripts are for the bash shell. Please feel to use the scripts, use them as an example or copy the tricks you need from them. All scripts contain in-code explanation and comments (some more than others).

Repository structure

This repository is organised in the following three directories:

• home/ contains bash login scripts found in a user's home directory
• motd/ contains message-of-the-day scripts, usually found in /etc/update-motd.d
• scripts/ contains shell scripts

Shell script

Overview of shell scripts in scripts/:

Script	Description
slapt.sh	Check and update software packages
slbackup.sh	Backup files and encrypt to an external device
slblockip.sh	Add or remove ip-ranges to block by ufw
slcert.sh	Create a new signed certificate using OpenSSL
slcheck.sh	Perform various system checks
slcreatevm.sh	Create a kernel-based Virtual Machine
slhab.sh	OpenHAB CLI script using the openHAB rest interface
slimgc.sh	Image conversion script to create svg-logos from png-images using Imagick and Potrace
slpem.sh	Quick 'n dirty script to create a pound pem-file
slrplog.sh	Filter unknown ip addresses from reverse proxy log