Root CA and Wildcard Certificate Generation in CentOS/RHEL 6&7
Hi folks ! this is one of the best method to create your own RootCA server and generating self-signed wildcard certificates.…
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List of virtual adapters your Virtual Linux can access
Hello , Its me again Raja and this time I came up with one more new post. I have been through interesting problem. As many of you…
Linux : full path of a file
Hello , Sometimes we need to have full or absolute path of file. And most of the times we used to pwd + filename manually. But wi…
Suspended Jobs vs Running jobs in Linux
Background Job : A job which is running background in the same shell. You can use bg command to see any background jobs. Foregrou…
Deny SSH access to particular users
We all know SSH is very famous and the best service for remote access. Today I am going to tell you how to block or allow only pa…
How to see IOWAIT in Linux
Hello , You can use sar command. in Ubuntu you can install it with sudo apt-get install systat and enable data collecting sed -i …
grep: unknown device method
Today while using grep command via rundeck I was through grep: unknown device method error. And the reason is due to I am having…
Uploading files to FTP/SFTP using CURL
Hello, Today I am writing below article which can help you to upload files to SFTP/FTP by using CURL. Ok why we need that ? Let m…
List the installed RPMs by date of installation in CentOS/RHEL 6.x
How to list the installed packages on date wise Command is : # rpm -qa --qf '%{INSTALLTIME} (%{INSTALLTIME:date}): %{NAME}-…
Vsftpd Response :550 Permission denied.
Hello, After installing vsftpd you may receive error as Response:550 Permission denied. Thats because you havent enabled write p…
Installing Chef server in your CentOS 6.7 easily.
I have tried to install chef in my CentOS 6.7 but it was like complicated thing till today. So many problems I have faced and I a…
Extract log efficiently by using sed
Modification of Log pulling command by using sed Old command That I use to do log extraction sed -nre '/12:23:12/,/12:24:12/ …
Reset Gnome 2 panel to default applets
If you ever accidentally remove your Gnome Panel in any Gnome 2.X default DE Linux then, you can reset it to default with mv ~/.…
Changing hostname in CentOS ,Redhat Linux OS
Hello , Today lets see an article about changing hostname in CentOS and Redhat. We have to change hostname in 3 locations to appl…
How to find outgoing IP in Linux ?
Here is a small snippet to find outgoing IP of your Linux box. 1. To find the outgoing internal IP only # ip route get 8.…
Getting load information via SSH
I have tried so many ways but finally happy with this #!/bin/bash for i in localhost 127.0.01 do ssh raja@$i 'uptime | grep -…
How to extract system load through SSH
Hi , with some research I have written these simple scripts which can extract only load average part from uptime command. these s…
See Open Ports in a Linux PC ( Localhost/Remote Machine)
I am writing a small post that will help you just to see what ports are open in a particular remote/local machine. we are going …
Tutorial on .htpasswd and .htaccess with apache(httpd) in Linux
If there is a situation that have to dealt with like a public website but with some secret information. How can we protect the in…
Make the system Time Zone persistent across REBOOT in Linux
Hi Guys! Are tou tired of fixing the Time Zone across reboot in your Linux box..? Here are three simple steps for you to fix the…