Some useful “YUM” and “RPM” Commands
some useful “yum” and “rpm” commands: # rpm –checksig <.rpm> (Need to check signature of an rpm) # rpm -ivh <rpm-package> (Installing an rpm package) # rpm -qpR <rpm-package> (Checking dependencies of rpm package before installing it) # rpm -ivh –nodeps <rpm-package> (Installing a rpm without dependencies) # rpm -qa <rpm> (Checking installed rpm) # […]
Sudo in Linux
Sudoers file is a file which plays a very important role in managing user and group access which can be performed on system. You can assign privileges to users and groups as per requirement. Root is super user and have all access. You can also provide root level access to normal user. Root user has […]
User and Group Management
Any User can be assigned to any physical user or accounts that exists for specific application to use. Each user is assigned with a unique numerical identification number called UID. User ID (UID) 0-999 reserved for system purpose and we can create other user with 1000+.Groups are logical expression of organization where multiple users can […]
A brief knowledge of Network Management in RHEL8
In RHEL8, Network is managed by NetworkManager daemon. We can use it to configure and manage networks in system.NetworkManager package is preinstalled in RHEL8.nmcli tool can be used to configure networks using command line. nmtui is text-based user interface for NetworkManager.You can still use ifcfg files to configure network configurations. Service “NetworkManager” is used for starting/stopping […]
Subscription Management for RHEL OS
To register your system to RedHat Customer Portal Subscription management. Use below commands and use your RedHat login credential: # subscription-manager register #it will ask Username/Password. To get List of available subscriptions: # subscription-manager list –available –all To active a subscription, you need to subscribe it through Pool ID (which can be get from above […]
System Services and Runlevels
System ServicesSystemd is a system and service manager for Linux Operating System.Systemd is designed to work with SysV init scripts, and have some features like start up of services on boot, on demand etc.You can easily stop, start and check any service status of Linux Operating System.Systemd has replaced init from Redhat 7. The SysV […]
Installation of Linux Operating System (Red Hat 8) in VMWare Workstation
You can follow below steps and can install Linux Operating System in VMWare Workstation. We are installing Red Hat 8.Step1: Go to your desktop icon of VMware Workstation and open it. It will prompt you with below screen for Create, Open and Connect to Virtual Machine. We will go ahead and create a new virtual […]
Sample Kickstart file for CentOS7
Below is sample Kickstart file for CentOS7 installation via network: #CentOS install via network # System language lang en_US # Keyboard layouts keyboard us # System timezone timezone Asia/Kolkata –isUtc # Root password rootpw –iscrypted encrypted-password #platform x86_64 reboot url –url=http://repos.example.com/repos/centos78/ bootloader –append=”rhgb quiet crashkernel=auto” zerombr # Partition clearing information clearpart –all –initlabel #autopart # […]
Pulp Commands – Open Source Repository
Pulp is basically a open source repository management from where you can create a repository for your environment. You can copy a remote repository or can hosts your rpms.There are lot of commands which can help you managing your pulp repository. Start, Stop and Restart pulp services: # systemctl start pulp_celerybeat # systemctl start pulp_resource_manager […]
Linux Directory Structure
/bin : All the executable binary programs (file) required during booting, repairing, files required to run into single-user-mode, and other important, basic commands viz. , cat, du, df, tar, rpm, wc, history, etc. /boot : Holds important files during boot-up process, including Linux Kernel . /dev : Contains device files for all the hardware devices […]
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