Useful SysAdmin Scripts

A list of scripts I've created to simplify life as a sysadmin in a small- to medium enterprise environment.

Getting Started

Run the command on the operating system in question to execute the ocmmand.

CentOS7

Scripts for CentOS 7. These may work on other RHEL distros, but have not been tested.

Setup Menu

This script functions as a menu an a quick way to navigate between the other scripts with only a single command.

bash -c "$(curl -s https://raw.githubusercontent.com/kmoberg/UsefulSysadminScripts/master/Scripts/CentOS7/setup-menu.sh)"; 

First Setup

The first very basic setup of CentOS7, this script sets a new hostname, installs some useful tools: wget, vim, nano and cockpit among others, enables cockpit and creates a firewall exception, then adds yum update to crontab to run once a week. Additionally, the script adds some useful information to the /etc/issue file - the logon screen for users who login to the console. This is only shown on the console, and not via SSH or any remote-access. For sensitive information or some production environments this should be removed for security reasons.

bash -c "$(curl -s https://raw.githubusercontent.com/kmoberg/UsefulSysadminScripts/master/Scripts/CentOS7/first-configuration.sh)"; 

Joining CentOS to Active Directory

This script will install the prerequisites for CentOS to join a Windows Active Directory Domain. The script will first install the prerequisits for LDAP and Active Directory, then prompt for domain-admin credentials and the domain name. Once joined, the script modifies the sssd.conf and sshd_config files to accept traffic from only domain users in the "linux-user" or "linux admin" AD groups over SSH and finally adds the "linux admin" group to sudoers.

bash -c "$(curl -s https://raw.githubusercontent.com/kmoberg/UsefulSysadminScripts/master/Scripts/CentOS7/centos-activedirectory-integration.sh)";