How to Allow/Deny Access for AD Users/Groups using Realmd on CentOS 8

Once the Linux machine joined with any Active Directory Domain, all the AD users can get SSH login on the machine with regular user privileges to avoid this access can manage using realm command.

How to Resolve Slow SSH Login Before Getting Password Prompt on CentOS 8

Sometime SSH login failures encountered with gssapi-with-mic authentication method and hence takes time to get password prompt.

How to Allow SUDO Access to a Domain User/Group on CentOS 8

By default, Domain users doesn’t have any type of sudo privilege and even can’t switch as root user. On CentOS 8 sudo access can be granted access based on usernames or groups and same can be done for one/many commands.

How to Extend Logical Volume on CentOS 8

Sometime encountered with no space left on file system error and demand opened to increase file system space. It would be easy if file system is created under LVM.

How to Install tcpdump and use of tcpdump command on CentOS 8

Tcpdump is a command line utility which is widely used to capture packet sniffer or filter TCP/IP packets that received or transferred over the network. it is allowing to analyse headers of TCP/IP which helps in network troubleshooting.

How to Configure Local Synced YUM repository on CentOS 7 using HTTP

YUM (YellowDog Updater Modified) is a package management tool for RPM based Linux system that helps to install, uninstall, and update packages. Local yum repository is used to save bandwidth, fasten package installations, network installations and systems updates for n numbers of systems in a local area network.

How to Resolve showmount fails with error “clnt_create: RPC: Program not registered “on CentOS 7

NFS share is a network file sharing protocol. It is used to provide shared access to files and folders across Linux machines over the network. This error comes when sometime the NFS service is stopped on the NFS server and will gives the below error while running showmount –e <NFS Server IP>.

How to Resolve kernel panic at boot with error initrd image file not found on CentOS 7

Sometime after yum update transaction break or kernel update or fresh install, the system fails to find initrd (initial ram disk) and also due to that unable to mount the root file system and also fail to boot the system with below message on CentOS 7 systems: