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day36:linux基础命令学习(二)

  • 2026-06-22 19:39:28
day36:linux基础命令学习(二)

1.cd:切换目录 

 cd . .  返回上一级,

 cd ~  回到主目录 ,比如 root 用户回到 /root,普通用户回到 /home/用户名

2.cp 复制

cp -r 递归复制,即复制整个目录

3.cat 显示文件内容

4.ps 显示当前进程

ps -ef 显示所有进程

5.kill 进程号  杀死进程

kill -9 进程号  强制杀死进程

6.df 显示磁盘空间(一般在根目录下用)

df -h 人性化显示磁盘空间(xxM)

7.date 显示当前日期和时间

8.uptime  -s 显示本次系统开机的绝对时间点,

常用来排查车机有无重启。

9.ping 测试网络连通性和网络时延

ping 网址/IP

10.grep 搜索匹配的内容/在...中过滤

常搭配 “|”使用:

ps -ef|grep 包名   过滤指定进程

top |grep 包名   查看指定包名的top信息

备注:

管道符 | 的作用是:将前一个命令的输出,直接作为后一个命令的输入,实现命令之间的数据“接力”。

没有管道时,命令输出通常打印到屏幕;有了管道,你可以把这些输出交给另一个命令继续处理

11.find 在指定目录中查找文件或目录

find /data/ -name "*.log"

(find 目录 -name "要查找的内容")

备注:

find:查找命令

· /data/:查找的起始目录(会递归进入所有子目录)

· -name "*.log":按文件名匹配,* 是通配符,代表任意字符。所以 *.log 匹配所有后缀为 .log 的文件

· 双引号(英文)用来防止 shell 提前解释 *,确保通配符传给 find 命令自己处理

day12:linux文件管理-基础Linux命令(一)

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  140. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000573s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000809s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000324s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000328s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000493s ]
  6. SELECT * FROM `set` [ RunTime:0.000207s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000606s ]
  8. SELECT * FROM `article` WHERE `id` = 493775 LIMIT 1 [ RunTime:0.000415s ]
  9. UPDATE `article` SET `lasttime` = 1783053199 WHERE `id` = 493775 [ RunTime:0.011529s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000286s ]
  11. SELECT * FROM `article` WHERE `id` < 493775 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.006316s ]
  12. SELECT * FROM `article` WHERE `id` > 493775 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000457s ]
  13. SELECT * FROM `article` WHERE `id` < 493775 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002602s ]
  14. SELECT * FROM `article` WHERE `id` < 493775 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.012546s ]
  15. SELECT * FROM `article` WHERE `id` < 493775 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001129s ]
0.130893s