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On Passing the CKA Certification

TL;DR

Passed the CKA (k8s v1.20); don’t know the score. The learning journey matters more than the outcome ;-)

main()

The CKA is my 1st IT certification in 7 years, last obtained was the CCA for Xe
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IT牛人.117 2021-04-14 11:00 | 查看: 36

vmtouch The Virtual Memory Toucher

TL;DR

Everyone loves touch.

vmtouch is the virtual memory toucher, portable file system cache diagnostics and control.

main()

OS kernel takes care of filesystem cache, generated from read / write.
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IT牛人.117 2021-02-08 15:09 | 查看: 35

Time to Go All In for Podman

TL;DR

Docker Compose support lands in Podman 3.0.0 (dev as of 3rd Feb, GA soon). It can finally work seamlessly with Docker Compose as drop-in replacement to orchestrate containers.

NOTE: Initial su
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IT牛人.117 2021-02-03 15:23 | 查看: 31

The Fall of CentOS

TL;DR

Use Oracle Linux (run RHCK) as free RHEL alternative.

main()

Goodbye CentOS, well done IBM (Red Hat).

There will be NO CentOS 9.

No updates for CentOS 8 after 31 December 2021.

No upda
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IT牛人.117 2020-12-09 11:00 | 查看: 40

kitty tweaks for macOS

TL;DR

kitty has become my preferred secondary Terminal Emulator on macOS.

To make it as productive as it is under Linux, and in line with muscle memory tweaks are needed, add the following in ~/.con
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IT牛人.117 2020-07-23 14:00 | 查看: 37

iproute2 & systemd output in JSON format

TL;DR

Didn’t notice ip provided by iproute2 supports output in JSON format until I read about the motivation behind jc.

Example

ip -j a | jq
ip -j r | jq
ip -j -s link | jq

main()

Must have JSON
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IT牛人.117 2020-06-09 16:00 | 查看: 30

Make Windows Productive Again with WSL 2

TL;DR

Windows Terminal (Terminal Emulator) + Ubuntu (20.04 latest LTS) via WSL 2 + winget makes Windows 10 productive for Linux / macOS power users.

main()

I was given a Dell Latitude 5300 2-in-1 b
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IT牛人.117 2020-06-02 12:00 | 查看: 27

404 day, stay 200

TL;DR

It’s 404 Not Found day of the year 2020 (404 * 5), everyone stay 200 OK.

$ date -I
2020-04-04

main()

$ curl -LIs who.is/responsible/4/covid-19
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Server: Vanish
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HTTP/1.1 404 Not Found
.
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IT牛人.117 2020-04-04 12:43 | 查看: 33

sysctl drop_caches is write-only since Linux 5.5

TL;DR

terry@n54l:~$ cat /proc/sys/vm/drop_caches
cat: /proc/sys/vm/drop_caches: Permission denied

terry@n54l:~$ sudo -i
root@n54l:~# cat /proc/sys/vm/drop_caches
cat: /proc/sys/vm/drop_caches: Permi
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IT牛人.117 2020-04-03 12:52 | 查看: 31

systemctl isolate home.target && systemctl restart blog.service

TL;DR

I am resurrecting self-hosted personal blog, tweets are often instant spark of thoughts like spring, quick fun but hard to search and reference when needed. Contents and opinions of value shoul
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IT牛人.117 2020-04-02 17:49 | 查看: 32

My Nexus 5X bullhead is gone for good

TL;DR

The 13 months old Nexus 5X 32GB entered an infinite reboot loop, it has gone for good. LG != Life’s Good, it stands for Low (quality, standards) Goods really, avoid at any cost.

NOTE: My previ
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IT牛人.117 2017-04-25 18:30 | 查看: 4955

Why 370Z

TL;DR

I am going to buy a manual Nissan 370Z - the Fairlady.

Why 370Z?

Engine: VQ37VHR 3.7L V6 245kW/363Nm (redline @ 7500rpm). The best NA V6 engine, I lost count on how many times it has won Ward
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IT牛人.117 2017-03-14 18:30 | 查看: 78729

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