Common.md

Linux common note

High cpu usage

Sometimes can not find high CPU usage by htop.

Try ps -eo pcpu,pid,user,args | tail -n +2 | sort -k1 -r -n | head -10

Turn off laptop monitor when openSSH

On some laptops, closing the monitor may cause the server to shut down, even though you don’t need the monitor when running a Linux server on the laptop.

Solution

  • sudo vim /etc/systemd/logind.conf
  • Add line
    • HandleLidSwitch=ignore
  • Run sudo systemctl restart systemd-logind

Expect command

Used for script command.

Example script after ssh login

expect -c '
spawn sudo su - root
expect "*"
send "password\n"
interact

Linux 常用記事 (Translated by chatGPT)

CPU 負載過高

有時候 htop 無法找出 CPU 負載過高的問題。

嘗試使用以下指令：ps -eo pcpu,pid,user,args | tail -n +2 | sort -k1 -r -n | head -10

開啟 SSH 時關閉筆電螢幕

在某些筆電上，關閉筆電螢幕可能會導致伺服器關閉，但實際上在運行 Linux 伺服器時不需要螢幕。

解決辦法

  • sudo vim /etc/systemd/logind.conf
  • 新增以下內容：HandleLidSwitch=ignore
  • 執行 sudo systemctl restart systemd-logind

Expect 指令

用於腳本命令。

以下是一個 SSH 登入後的範例腳本：

expect -c '
spawn sudo su - root
expect "*"
send "password\n"
interact


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linux