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Linux命令6

  • 2026-07-02 08:49:40
Linux命令6
1、生成指定日期的txt文件
touch 202601260101000 test.txt
2、生成指定日期的目录
mkdir 20260126
touch -t 202601260101000 20250126
3、把多个txt文件合并成1个大文件
cat file1.txt file2.txt file3.txt>merged.txt
4、把txt文件大小变成0
truncate -s 0 filename.txt
5、查询文件中有多少条数据
wc -l filename
6、查看目录下按日期排序的所有文件
ls -lrt
7、删除files目录下的所有文件，不删除目录
rm -r /home/files/*
8、关键字搜索
cat filename.txt | grep test
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  1. 请求信息 : 2026-07-02 23:27:47 HTTP/2.0 GET : https://f.mffb.com.cn/a/497150.html
  2. 运行时间 : 0.306391s [ 吞吐率：3.26req/s ] 内存消耗：4,505.55kb 文件加载：140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=624b5b39035375ed2d73c51ebbb6c51b
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  1. CONNECT:[ UseTime:0.000866s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001463s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.006106s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000621s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001387s ]
  6. SELECT * FROM `set` [ RunTime:0.000475s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001383s ]
  8. SELECT * FROM `article` WHERE `id` = 497150 LIMIT 1 [ RunTime:0.000895s ]
  9. UPDATE `article` SET `lasttime` = 1783006067 WHERE `id` = 497150 [ RunTime:0.040884s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.003373s ]
  11. SELECT * FROM `article` WHERE `id` < 497150 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001432s ]
  12. SELECT * FROM `article` WHERE `id` > 497150 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006776s ]
  13. SELECT * FROM `article` WHERE `id` < 497150 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.017911s ]
  14. SELECT * FROM `article` WHERE `id` < 497150 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009248s ]
  15. SELECT * FROM `article` WHERE `id` < 497150 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.075262s ]
0.313385s