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Troubleshooting

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 16.04 LTS server?
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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?
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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?
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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?
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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 server? How to check if crond server is enabled and/or is running properly on Ubuntu Linux server?
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How to check boot path (partition) in Linux

How do I identify the boot device or boot path in Linux operating system?
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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 Mac OS X version from Terminal app bash shell?
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How to summarize detailed system resource usage for given command on a Linux or Unix

How 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?
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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 space. How to remove unused old kernel images on Ubuntu Linux safely?
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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 do I make sure my sata hard disk is working at 6Gbps speed and how do I verify this on a FreeBSD server hardware?
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