How to Download a Full macOS High Sierra Installer App

Many Mac users who are attempting to download macOS High Sierra from the Mac App Store will find that a small 19 MB version of “Install macOS High Sierra.app” downloads to the /Applications folder of the target Mac, rather than the complete 5.2 GB Installer application for macOS High Sierra. This is annoying because it […]

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Linux: 20 Iptables Examples For New SysAdmins

According to the official project site: netfilter is a set of hooks inside the Linux kernel that allows kernel modules to register callback functions with the network stack. A registered callback function is then called back for every packet that traverses the respective hook within the network stack. This Linux based firewall is controlled by […]

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30 Handy Bash Shell Aliases For Linux / Unix / Mac OS X

An alias is nothing but the shortcut to commands. The alias command allows the user to launch any command or group of commands (including options and filenames) by entering a single word. Use alias command to display a list of all defined aliases. You can add user-defined aliases to ~/.bashrcfile. You can cut down typing time […]

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How to get domain name from URL in bash shell script

How can I extract or fetch a domain name from a URL string (e.g. https://www.cyberciti.biz/index.php) using bash shell scripting under Linux or Unix-like operating system? You can use standard Unix commands such as sed, awk, grep, Perl, Python and more to get domain name from URL. No need to write regex. It is pretty simple. […]

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