Some times you need to disable sudo su – access on your environment so that the users will use sudo command always and they will not switch to any other users account unnecessarily Lets see how to do it Edit the /etc/suoders by running visudo visudo Add the below Command Alias Cmnd_Alias BLOCKSU = /bin/su ...
Today apache was stuck with the below error and it was not starting at all. Sep 15 06:18:24 server.example.com systemd[1]: Starting The Apache HTTP Server... Sep 15 06:18:24 server.example.com httpd[15037]: [Thu Sep 15 06:18:24.591424 2016] [so:warn] [pid 15037] AH01574: module ruid2_module is alread...skipping Sep 15 06:18:33 server.example.com systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE Sep 15 06:18:33 ...
There may be scenarios, when you need to use a custom DNS server for your Instances. So if you are deploying your application on an CentOS 7 on AWS, lets see how can set a custom DNS server such as 8.8.8.8 and 8.8.4.4 Edit the following file, vim /etc/sysconfig/network-scripts/ifcfg-eth0 change the line PEERDNS="yes" to PEERDNS="no" Now, Edit the ...
As a Linux System admin, we always love to work on CentOS and RHEL. In my case i had to launch a CentOS7 instance from the AWS Marketplace again. When we set the hostname with hostnamectl and reboot, yes the Instance comes with the default hostname again. So i have thought of documenting it here, so ...
Issue You are trying to install vmware-tools on RHEL / CentOS 7 You are stuck with the below error. The path "" is not a valid path to the 3.10.0-327.el7.x86_64 kernel headers. Solution You have to install the below two packages, kernel-headers and kernel-devel You can run the below command to install those via yum. ...
We often need to add or modify a disk to a running server. In this article, we will see how you can Add new LUN or Disk, or Resize the LUN or Disk on a Linux without a reboot Scenario 1 – Add a new Disk or LUN You have added a new disk / ...
