A Brief Background Container or OS-level virtualization implementations in Operating Systems have been around for a while [chroot in Version 7 UNIX (1979), FreeBSD jails (2000),……
After spending a few hours on developing some scripts, I hastily fat-fingered a command and removed my entire scripts directory on my RHEL 7 server.……
Although Ansible is typically used to execute tasks on multiple machines concurrently by generating Python scripts from YAML files and copying over those scripts to……
Here’s a no-frills rundown of the procedure that I followed to install the Graylog 2.5 Log management application on a RHEL 7.6 VM with outbound connectivity……
Traditionally, Linux OSes named network interfaces in the format ethN (e.g. eth0, eth1, etc.). This assignment did not establish any relationship between the interface name……
When executing a program (check_icmp) as part of the Check_MK software, the following error was displayed: check_icmp: Failed to obtain ICMP socket: Operation not permitted……
Problem: When trying to register a Linux client with an RHN Satellite server using the rhnreg_ks utility, the following error is displayed: Introspect error: The……
Problem: The sendmail service takes a while (more than a minute) to start and emails sent via sendmail take a couple of minutes to get……
Requirement: Wipe away /old and add the space recovered (5 GB) to /new for the following disk layout: Filesystem Size Used Avail Use% Mounted on……
Problem: On RHEL 6 (Santiago), a “yum update” fails with the following error: Error: failed to retrieve repodata/filelists.xml.gz from rhel-x86_64-server-6 error was [Errno -1]……
Under normal working conditions, when SNMP Managers query SNMP agents (snmpd) on RHEL 6, several lines of information similar to the following are logged into……
Problem: The logrotate process caused high CPU utilization, ran for about 5-6 hours and finally exited with a non-zero (failure) exit code. Background & Analysis:……
Problem: When trying to connect to a server via SSH, the authentication is slow (takes a few seconds), but the server seems normally responsive after……
In trying to make my team aware of what’s in our team’s wiki (based on Mediawiki), I wanted a simple notification to go out to……
Problem: On SLES 11 SP 1, while trying to add users with the useradd command, the following is displayed: useradd: Unknown group `video’. useradd: Unknown……