HowTo: Unpack .tgz File On a Linux

I am a new Linux user. I am having problem with the Terminal. How do I unpack .tgz (tar.gz) file on a Linux using command line option?   Most Linux and open source software files…

OpenBSD: Reload / Restart / Stop dhcpd Server Command

I manage MS-Windows server and recently started to play with OpenBSD server. How do I reload or restart the dhcpd server on OpenBSD using shell command line option?   If you made changes to the…

HowTo: Upgrade CentOS Linux 6.4/6.3/6.2/6.1/6.0 to v6.5

C entOS Linux v6.5 has been released and available via repos for immediate update. The new version includes several hundred bug fixes for, and enhancements to the Linux kernel. How do I upgrade from CentOS…

Mac OS X: Install Go Programming Language

H ow do I install Go language on Apple Mac OS X? How to setup GO lanuage on Mac OS X? How do I install Go language version 1.2+ on OS X?   Go or…

What Does –– (double dash) Mean In SSH Shell Command?

I see lots of seasoned admins and cloud provider wrapper scripts use ssh client command as follows in shell: ssh nixcraft@server1.cyberciti.biz — What the double — (dash) does here? Why it is used in this…

Mac OS X Sierra Install wget Network Downloader Utility

I recently learned that “wget” can continue getting a partially-downloaded (resume download) file. I am unable to find wget command on Mac OS X. How do I install install wget on Mac OS X (Mountain…

CentOS / RHEL: See Detailed History Of yum Commands

I would like to see detailed information on the history of yum transactions such as updates, deleted packages, and other information. How do I see history of yum commands on CentOS / RHEL 6.x based…

Linux / Unix: whereis Command Examples

I am a new Linux and Unix-like system command line user. How do I find and locate the binary, source, and manual page files for a given command?   You need to use the whereiscommand…

Linux / Unix: Check Last Time User Logged In On The System

I am a new Unix system admin. How do I find ouw who has recently use the Linux or Unix-like server? Which terminals they used, and when they logged in and out of the my…

Ubuntu Copy File Command

I ‘m a new Ubuntu Linux user. This seems like a newbie question, but I can not seem to find examples to copy files on Ubuntu. How do I copy file to another directory on…