How To Find Hard Disk SATA Link Speed On FreeBSD

I know how to find out my SATA link speed such as 3.0 or 6.0 Gbps on Linux operating system. How do I find out my SATA link speed on FreeBSD Unix operating system? How…

Debian / Ubuntu Linux Delete Old Kernel Images Command

I ‘m a new Ubuntu Linux user and noticed that old kernel still exists in my system. Why doesn’t Ubuntu remove old kernels automatically? How do I delete old unused kernel images to free disk…

How to summarize detailed system resource usage for given command on a Linux or Unix

H ow do I determine the system resource usage during of execution of a particular command on a Linux, OS X Unix, BSD and Unix-like operating system?   You need to use /usr/bin/time (hereinafter referred…

How to find out Mac OS X operating system version information from Terminal command prompt

I use ssh client to login into my Mac Min server without GUI. How can I tell what version of Mac OS X operating system am I using command prompt? How do I find out…

How to check boot path (partition) in Linux

H ow do I identify the boot device or boot path in Linux operating system?   You can find the boot device or boot path in Linux using any one of the following command: fdisk…

Ubuntu Linux check cron log file error or messages in /var/log/cron.log file

I am trying to find errors or message for my cron job on Ubuntu Linux server. Where is the cron log in Ubuntu Linux 12.04/14.04 LTS server? How do I check cron logs in Ubuntu…

Ubuntu sudo: add-apt-repository: command not found error and solution

I ‘m trying to run a command ‘sudo add-apt-repository ppa:foo/bar‘ but getting the following error: sudo: add-apt-repository: command not found How do I fix this problem on Ubuntu Linux 14.04 LTS server?   To manage…

How to reload sysctl.conf variables on Linux

I am new Linux system user. How do I reload all sysctl variables without rebooting my server?   The sysctl command is used to modify Linux kernel variables at runtime. The variables are read and…

How to install htop on pfSense firewall

I am using pfSense version 2.3.2-RELEASE (FreeBSD 10.3-RELEASE-p5). How do I install htop version 2.x on a pfSense firewall?   htop is an awesome and interactive system-monitor process-viewer. It acts as an alternative to the…

Ubuntu 16.04 Create a cron.log File To Log crontab Logs

I am a new Ubuntu Linux 16.04 user. How do I verify that my cron job is executing? I am unable to find /var/log/cron.log file. Where is the cron log file on Ubuntu Linux 16.04…