The goal of the post is to achieve moving the home directory into a newly added disk that has a dedicated Partition. 1. Add the new disk and create the necessary partition(for example sdb1). 2. Move the home folder into one of the partitions. To use a filesystem, it has to be mounted to the […]
CentOS/RHEL
“BAD PASSWD : is too simple” – error during password change in CentOS/RHEL 7 and 8
Question: How too avoid the warning “BAD PASSWD : is too simple” when changing password in Linux? 1. Modify the configuration file /etc/pam.d/password-auth and /etc/pam.d/system-auth to set the password complexity. # vi /etc/pam.d/password-auth The following information are displayed. auth required pam_env.so auth sufficient pam_unix.so try_first_pass nullok auth required pam_deny.so account required pam_unix.so #password requisite pam_cracklib.so […]
How to allow all traffic from a server using firewalld in CentOS/RHEL
This post outlines steps to add a host or network range to a trusted zone, in firewalld, to allow all traffic regardless of the destination port. To create a rule to allow all traffic from a node or network range, it should use the trusted network zone in firewalld. 1. To add an host to […]
How to Configure firewalld Logging in CentOS/RHEL 8
Question: How to enable logging in firewalld for CentOS/RHEL 8? 1. Edit the /etc/firewalld/firewalld.conf and change the “LogDenied” line to the following: # vi /etc/firewalld/firewalld.conf LogDenied=all 2. Edit the /etc/sysconfig/firewalld and add or change the “FIREWALLD_ARGS” line to the following: # vi /etc/sysconfig/firewalld FIREWALLD_ARGS=–debug=10 3. Restart the firewalld service: # systemctl restart firewalld.service 4. Check […]
“Failed to Synchronize Cache For Repo ‘repo_name’, Ignoring This Repo” – CentOS/RHEL 8 error
The Problem While installing package or listing using dnf or yum commands getting below errors: # dnf repolist .. Failed to synchronize cache for repo ‘xxx’, ignoring this repo. Failed to synchronize cache for repo ‘yyy’, ignoring this repo. While checking the dnf logs: # tail -f /var/log/dnf.log 2019-08-12T10:58:13Z INFO — logging initialized — 2019-08-12T10:58:13Z […]
How to delete unused kernels and keep only the running kernel in CentOS/RHEL
Question: How to keep only running kernel in a CentOS/RHEL Linux system? Keeping less than 2 kernels in a Linux system is strongly not recommended. There are several reasons for this recommendation: If an installation of a new kernel is interrupted or aborted in any before it completes successfully, rebooting the system with that kernel […]
How to see what has changed in Kernel Versions (changelog) in CentOS/RHEL
Please check the following solution to see the changes, bug fixes and security improvements in kernel versions. Download the kernel version through ULN or yum.oracle.com and execute the “# rpm -qp –changelog [kernel rpm package]” command in order to see changes in the kernel versions. # rpm -qp –changelog [kernel rpm package] For example: # […]
User Account “systemd-bus-proxy”
This post provides information about the user account systemd-bus-proxy. The user account systemd-bus-proxy was used in the past by systemd-bus-proxyd service. systemd-bus-proxy:x:999:997:systemd Bus Proxy:/:/sbin/nologin Starting systemd-219-32, bus-proxyd was removed. Therefore, it is no longer in use in later systemd versions. * Mon Feb 20 2017 Lukas Nykryn – 219-32 … – remove bus-proxyd (#1317518) NOTE: […]
How to Manage Virtual Machines from the CentOS/RHEL 8 Web Console-Cockpit
The high-level steps are outlined below: Installing the Cockpit Virtual Machines Module Creating a Virtual Machine in Cockpit Starting the Installation Add other servers in Cockpit to montior The Web Console is installed by default on Oracle Linux 8 installations unless you do a minimal installation. The Web Console is not started by default, so […]
How to Install Cockpit’s Web Console in CentOS/RHEL 8
1. Install the cockpit package On CentOS/RHEL 8 8 systems with non-minimal installations, the cockpit package is included by default. Otherwise, it would need to manually install Cockpit. In either case, running the following command ensures that the package is installed and is up to date. # sudo dnf install cockpit 2. Enable and start […]