Category Archives: Linux

How to plot sysstat (SAR) into a beautiful graph?

In the past, I had been using kSar to quickly plot graphs from sar files that I had collected from the systems, but I would really prefer a system that it can consolidate all the sar reports from various systems … Continue reading

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Oh yes! Got the internal workstations to work with internal RH Satellite

After a few weeks of testing and experimenting, finally found out the issue of the setup:some repos were not enable by default Now, I had figure the issue and put the changes into cfengine (yes I know is old school) … Continue reading

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Installing CentOS7/RHEL7 from YUMI

It seem like CentOS7/RHEL7 is slightly different from CentOS6/RHEL6, when trying to install from USB with multiple boot images (eg YUMI). CentOS7/RHEL7 require “inst.stage2″^^1 to be specific, and the default from the ISO file is “inst.stage2=hd:LABEL=CentOS\x207\x20x86_64” or “inst.stage2=hd:LABEL=RHEL-7.3\x20x86_64”. This will … Continue reading

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Extra kernel option for booting NVMe in Dell Precision T3420

I just got a new Dell Precision T3420 for testing RHEL6 installation on it.I had struggle for a few days as the nvme driver (0.10) that’s in kernel-2.6.32 is unable to handle the Interrupt remapping done by the BIOS, and … Continue reading

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SSH tricks and tips

What is the most common tools you will be using when administrating Linux? I would say “ssh”, is the most common tools for any Linux administrator. If you are going to admin Linux from Windows (yes, you can), then you … Continue reading

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Wait … which Linux Distro to use?

I had been saying that as Linux SysAdmin, you should get yourselves familiar with a few tools: git scripting¬†– BASH/Python But which Linux Distro should you be using? ¬†This really depends on you, and what you will be administrating and … Continue reading

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Second thing to learn as Linux Sysadmin

As Linux sysadmin, you will require to do a lot of repetitive and soon to be boring things like: 1. create/delete user, and reset password 2. change configuration files 3. update systems 4. etc Most of this tasks you can … Continue reading

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