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电脑卡成PPT却不知道谁在捣乱?5条命令让你一眼看穿

  • 2026-07-26 06:15:20
电脑卡成PPT却不知道谁在捣乱?5条命令让你一眼看穿

上一篇文章讲了怎么用命令管理文件。这一篇换话题——电脑突然变慢,鼠标转圈、WPS 卡住,你想看看怎么回事,却发现麒麟系统好像没有"任务管理器"?

其实有。只是不在桌面右键,在终端里。


一、top —— 谁在"偷吃"我的 CPU?

top

Linux 的"任务管理器"。执行后实时显示所有运行中的程序,以及每个程序吃了多少 CPU 和内存:

PID   USER   CPU%   MEM%   COMMAND1234  张三    45.2   12.3   firefox5678  李四    28.1    5.7   wps

CPU% 谁数字最大谁在吃处理器,MEM% 谁大谁在占内存。如果 Firefox 占了 90% CPU,关几个标签页就好。

按 q 退出。

如果装了 htopsudo apt install htop),界面更漂亮——有颜色进度条。


二、df —— 硬盘还剩多少空间?

df -h

相当于 Windows 里"我的电脑"看 C 盘还剩多少。-h 意思是"人类可读"——按 GB/MB 显示而不是字节。

文件系统        大小  已用  可用  使用%  挂载点/dev/sda1       98G   45G   48G    49%   //dev/sda3      200G  176G   24G    88%   /home

挂载点是 / 的是系统盘,使用%接近 100% 很危险。/home 是你的个人数据盘。

想知道哪个文件夹最占空间:

du -sh *

列出当前目录下每个子文件夹的"体积"。如果 ~/.cache 占了几 GB,清理一下。


三、free —— 内存够用吗?

free -h
             total   used   free   available内存:        7.6G   4.2G   1.1G       2.8G交换:        2.0G   0.8G   1.2G

最重要的数是 available——"还可以给新程序用的内存"。小于 500MB 说明电脑随时会卡,先关掉不用的程序。

Swap 是"虚拟内存"——真内存不够了在硬盘上借一块地。速度慢但比直接崩溃好。


四、ip —— 我 IP 是多少?

ip a
2: enp3s0: <UP>    inet 192.168.1.105/24

inet 后面就是你的内网 IP。同事想访问你的共享文件问IP时,敲这个就看到了。

ip a | grep "inet "

只显示 IP 行,更清晰。


五、ps + kill —— 谁在偷偷跑?卡死了怎么关?

ps aux | head -20

拍一张"系统快照",列出当前所有运行中的程序。| head -20 限制只显示前 20 行。

ps aux | grep wps

从所有程序里只找出包含"wps"的。WPS 是不是卡在后台了?这条命令能看。

如果确实卡死了,记下它的 PID 号码,强制结束:

kill -9 1234

-9 意思是"别废话,马上关"。


一张图总结


常用组合拳

电脑突然巨慢:

top && free -h && df -h

三连击定位原因。

WPS 卡死关不掉:

ps aux | grep wpskill -9 那个PID数字

同事问你要 IP:

ip a | grep "inet "

两篇文章——《文件管理 7 命令》和《系统状态 5 命令》——加起来就是麒麟系统日常最常用的命令集。开始可能需要对着文章敲,三天后手指自己就记住了。

本文适合麒麟桌面操作系统 V10 / 统信 UOS V20 用户。

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  1. CONNECT:[ UseTime:0.000597s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000745s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001217s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.003208s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000623s ]
  6. SELECT * FROM `set` [ RunTime:0.000222s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000563s ]
  8. SELECT * FROM `article` WHERE `id` = 536151 LIMIT 1 [ RunTime:0.001391s ]
  9. UPDATE `article` SET `lasttime` = 1785051343 WHERE `id` = 536151 [ RunTime:0.009981s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000271s ]
  11. SELECT * FROM `article` WHERE `id` < 536151 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000479s ]
  12. SELECT * FROM `article` WHERE `id` > 536151 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000551s ]
  13. SELECT * FROM `article` WHERE `id` < 536151 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000609s ]
  14. SELECT * FROM `article` WHERE `id` < 536151 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000632s ]
  15. SELECT * FROM `article` WHERE `id` < 536151 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001249s ]
0.091031s