Category Archives: UNIX

tmux

本篇是筆記文, 記一下 tmux 的特別用法

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ARM64 Linux Performance Tuning

This is personal notebook for ARM64 performance tuning.

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Intel Coffee Lake Ubuntu Linux 速度太慢

這個也是怪自己,最近因為 Windows VM 不知道為什麼速度變很慢,所以改用 Linux 跑 VM ,雖然 Linux 下 VM 速度比 Windows 快,但是整體的感覺還是慢.本來以為是我的 i5-9600k VM 表現不好,但是看著 CPU utilization 感覺還是怪

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Windows 10 存取 Ubuntu Samba 問題

不知道是不是公司控管電腦的問題,我公司的電腦一直沒辦法存取 Samba 的目錄

今天終於下定決定找一找可能是什麼問題

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[Gentoo][ARM64] Compile qtwebengine fail

If CPU number is too much, compile qtwebengine will fail, seems ninja compile issues.

it better to reduce CPU number under 8, batter number is 4 or 6.

just put MAKEOPTS=”-j 4″ on your /etc/portage/make.conf

It can be roll back after compile qtwebengine.

modify package.env can support special MAKEOPTS command on some packages.
ex:

echo "dev-qt/qtwebengine lowcpu.conf" | sudo tee -a /etc/portage/package.env
mkdir -p /etc/portage/env
echo "MAKEOPTS=\"-j4\"" | sudo tee /etc/portage/env/lowcpu.conf

ref.
[SOLVED] emerging qtwebengine-5.7.1
Memory problems on QtWebEngine build

htop more column for mass CPUs

htop can support multiple columns in one screen, just press F2 enter setup mode, and change left column and right column to CPUs (1-4/8) [Bar] and CPUs (5-8/8) [Bar]

htoprc , put it on /etc/htoprc or ~/.config/htop/htoprc

# Beware! This file is rewritten by htop when settings are changed in the interface.
# The parser is also very primitive, and not human-friendly.
fields=0 48 17 18 38 39 40 2 46 47 49 1
sort_key=1
sort_direction=1
hide_threads=0
hide_kernel_threads=1
hide_userland_threads=0
shadow_other_users=0
show_thread_names=0
show_program_path=1
highlight_base_name=0
highlight_megabytes=1
highlight_threads=1
tree_view=0
header_margin=1
detailed_cpu_time=0
cpu_count_from_zero=0
show_cpu_usage=1
show_cpu_frequency=0
update_process_names=0
account_guest_in_cpu_meter=0
color_scheme=0
enable_mouse=1
delay=15
left_meters=LeftCPUs4 Memory Swap
left_meter_modes=1 1 1
right_meters=RightCPUs4 Tasks LoadAverage Uptime
right_meter_modes=1 2 2 2

KDE Plasma CPU High Usage After Install Nvidia Driver

My notebook with RTX3060 has this issue after do something I don’t know. OS is Ubuntu 18.04

Everything is ok after first time install RTX3060, there is no high cpu issue, but after install IME(gcin), nomachine and anydesk and do something I don’t remember, plasma high cpu usage issue happened.

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The NVM Checksum Is Not Valid

這個是我 Intel i350-T4 最近出現的錯誤訊息,是最近 Power 壞掉之後才發生的,錯誤訊息如下

[ 775.510780] igb: Intel(R) Gigabit Ethernet Network Driver – version 5.4.0-k
[ 775.510782] igb: Copyright (c) 2007-2014 Intel Corporation.
[ 775.526676] igb 0000:01:00.0: The NVM Checksum Is Not Valid
[ 775.602407] igb: probe of 0000:01:00.0 failed with error -5
[ 775.617632] igb 0000:01:00.1: The NVM Checksum Is Not Valid
[ 775.693405] igb: probe of 0000:01:00.1 failed with error -5
[ 775.708632] igb 0000:01:00.2: The NVM Checksum Is Not Valid
[ 775.784404] igb: probe of 0000:01:00.2 failed with error -5
[ 775.799632] igb 0000:01:00.3: The NVM Checksum Is Not Valid
[ 775.875410] igb: probe of 0000:01:00.3 failed with error -5
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Gentoo ARM64 UEFI Install Guide

This is not a detail guide to describe how to full install system, just figure out some important point. Even not for Gentoo newbie.

Most important handbook is Gentoo AMD64 installation guide.
There is some different between ARM64 and AMD64

2021/08/31 Updated : No more need Ubuntu ISO image, ARM64 EFI minimal ISO can be download from official website: https://www.gentoo.org/downloads/

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自架 DNS 防成人內容

果然還是到了這一天,雖然總是有一天他們會看到,但是多多少少還是要設一道簡單的關卡
最簡單的是在路由器上設定 DNS ,畢竟誰都不喜歡在自己的手機電腦裝軟體吧

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