Monitoring servers are very important for every server administrator. There are a lot of command line tools are available to monitor server resource usages. The Sar or Sysstat is one of the great command-line tool to monitor the server resource…
commands
How to rename an already existing screen session?
We already discussed different topics on “screen” command in our previous discussions. You can refer to our previous topics for more details on that. 1) Screen command usage 2) How to access attached screen after connection dropped? The screen command…
Sar command usage with examples in Linux
Sar is one of the smart command line utility in Linux. Also, System Activity Reporter (SAR) is one of the important tool to monitor Linux servers.This command will helps system administrators to check the server resources status at different time…
15+ Commonly using OpenVZ commands and its usages
OpenVZ is a container based, OS level virtualization technique for Linux. OpenVZ creates multiple secure, isolated Linux containers (otherwise known as VEs or VPSs) on a single physical server. Each container performs and executes exactly like a stand-alone server. These…
How to sort and count emails in mail queue with mail senders’ name – Exim command
We already discussed the same on one topic to find-out the spamming on cPanel server with Exim. Here I am discussing some quick ways to list spam emails count with corresponding email senders’ name. It’s very useful in some situations…
Disable SSH root login – Linux
How to disable SSH login as root user – PermitRootLogin? PermitRootLogin – is an important directive in SSH configuration file to control the ssh login as root user. You can enable / disable root login access using this directive in…
Head command switches with example in Unix/Linux
7 plus head command switches with example in Unix/Linux The head command By default, the head command prints the first 10 lines from the file which is given followed by the head command. In the case of more than one…