Here is a handy and useful Linux and Unix shell script that reduce PDF file size using Ghostscript. No need to upload your PDF file to the shady third-party website. Just do it from the terminal. I tested it with both CentOS and Ubuntu/Debian Linux.
A sample shell script to build an LXD (Linux Containers) VM lab on Ubuntu Linux 16.04 or 18.04 LTS server.
A sample shell script to mirror remote server directory in pull mode for offsite backups using rsync command on Linux/Unix-like system.
Here is a simple and easy to use bash shell script to purge/delete Cloudflare url/images cache from the command line without using web interface.
Cloudflare is a CDN, DNS, WAF, DDoS protection, and reverse proxy service. You need to use the ngx_http_realip_module module to change the client address sent in the specified header field such as CF-Connecting-IP or X-Forwarded-For. This shell script downloads a list of IPv4 and IPv6 address from Cloudflare and generates an updated /etc/nginx/cloudflare.real.ip.conf file:
Ebtables is an application program used to set up and maintain the tables of rules (inside the Linux kernel) that inspect Ethernet frames. It is analogous to the iptables application, but less complicated, due to the fact that the Ethernet protocol is much simpler than the IP protocol. ebtables used with bridges on Linux. The following script will stop and clean all ebtables rules:
A simple shell script wrapper to update all lxd container hypervisor images eitehr running Debian or Ubuntu Linux.
A simple shell script wrapper to disable or enable PHP 5 upload support in an Apache or Nginx or Lighttpd web server. The script look for file_uploads directive in php.ini file and change its state from ON to OFF or vice-versa.
A simple shell script wrapper to start / stop / restart NFSv4 service on CentOS / RHEL v.6.x server in a particular order. This script also demonstrates how to use the ln command to create soft links to the same script and take a different action as per $0.