Objective: Prep dev httpd.conf for production Tasks: Remove jenkins virtual host entry (which starts with a comment line “#Start Jenkins”) Replace .dev with nothing (ex: www.dev.example.com becomes www.example.com) Replace debug with error (ex: Loglevel debug becomes Loglevel error) Sed to…
To rollback httpd.conf changes on error use this script: #!/bin/bash #File: deploy_new_httpd_conf.sh #Define this PATH_TO_NEW_HTTPD_CONF=”~” #Backup old httpd.conf file /bin/cp -f #Copy new httpd.conf over the existing one /bin/cp -f ${PATH_TO_NEW_HTTPD_CONF} #Test the Syntax /usr/sbin/apachectl -t if…
How to create a self-signed SSL certificate on CentOS/Redhat yum -y -q install mod_ssl openssl cd /etc/pki/tls/certs openssl req -new -newkey rsa:2048 -days 1460 -nodes -x509 -keyout server.key -out server.crt
To install Ruby and Chef on centos follow these steps: cd && wget “” yum install ruby ruby-devel yum install rubygems gem install chef
useradd script to add multiple users to a system and force them to change their password upon login try the following script: Redhat # for name in someuser anotheruser yetanotheruser; do useradd $name; echo ‘password’ | passwd –stdin $name; chage…
To remove blank lines from a file on a unix or linux computer try this: # grep -v “^$” filename > newfilename
I spent forever trying to figure out how to unwrap an apache access_log that was splitting requests between two lines. I finally found the answer! Create a perl script called unwrap.pl and run the script like this: # perl unwrap.pl…
On Linux disable SSH timeouts You’ll need to edit /etc/ssh/sshd_config and set these directives: TCPKeepAlive yes ClientAliveInterval 30 ClientAliveCountMax 99999 To set SSH to disconnect if the user does not input anything for then hours: TCPKeepAlive yes ClientAliveInterval 60 ClientAliveCountMax…
Configure client to use ntp-server 192.168.0.4 # nano -w Add line: server 192.168.0.4 iburst Remove lines: server 0 …. server 1 …. server 2 …. # service ntpd restart # chkconfig ntpd on Resize logical volume (lv) mounted at…
These are some labs I have crafted to prep for the RHCSA exam. Hopefully you will find this useful! Brakertech’s RHCSA Training Labs Objective: Configure NTP Client to sync against a custom NTP server Configure Local NTP Server The first…
