linux Archives ⋆ one27.cf

2021/07/25 by xpk

In EL7, we can use yum-cron to automatically install updates. On EL8, the equivalent tool is dnf-automatic. Here is how to set it up.

linuxEL8 linux

2021/07/25 by xpk

Load Averages on Linux/UNIX systems

techlinux

2019/05/15 by xpk

Run RHEL8 on docker with Red Hat UBI image

Red Hat is offering a few official docker images for RHEL8. One can now use or build images based on the latest operating system from Red Hat. Here is how to do it in 3 simple steps

techdocker linux rhel8

2021/07/24 by xpk

RHEL8 and Ansible

Red Hat EL8 is available now since May 7th. It’s not particularly exciting IMO. Many “new” features have been available on other distros quite a while ago. Here, I want to evaluate how easy it is to adopt my existing ansible playbooks on this new version of Red Hat.

techansible EL8 linux Redhat

2019/05/15 by xpk

UID > INT_MAX

From thehackernews, it was said when the UID is larger than INT_MAX, which is 2147483647, privilege validation is improperly handled and that gives the user right to run systemctl commands as if he/she is a privileged user. What is my INT_MAX? Though it’s hard to imagine who would use such an UID when they usually starts…

techlinux

2018/11/01 by xpk

Cool feature on Azure – Run Command Script

I don’t think I’ve ever said anything good about Azure, but I’ve finally ran into one today. Someone screwed up sshd_config and the service would not start anymore. With the run script tool, I was able to revert the config to the original version and restart the service. Fortunately, the changes were checked into RCS,…

techazure linux ssh

2018/07/27 by xpk

Building my first Linux package

Let’s take a look at how to build a really simple Linux package. The most common package formats are definitely .deb and .rpm. One will find them on Debian-variants and Redhat-variants respectively. In the following examples, a package will be created and it will contain 1 script.The script depends on Python so I want the…

techdeb linux package rpm

2017/04/15 by xpk

Redshift for Linux desktop

Ever since Mac deploys the night shift feature, I could not stop using it. For someone who needs to look at monitors for long hours, I absolutely love it. I can also do it with Linux.

otherscolor temp linux redshift ubuntu

2016/10/05 by xpk

GNU moreutils

Moreutils comes with additional Unix utilities. Sysadmin loves tools. Let’s see what tools are available.

otherslinux moreutils

2016/08/24 by xpk

Divide and conquer

There are times when I need to analyse Apache’s logs. Some of them can be quite large. Here, I’ll compare several methods and see if there is a faster way of doing so.

othersapache logs bash linux parallel