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为什么 Linux 叫 /etc、/usr、grep?那些命令名称背后的真实历史

  • 2026-02-28 01:11:50
为什么 Linux 叫 /etc、/usr、grep?那些命令名称背后的真实历史

前两篇 Linux 文章发出后，我原本以为大家会继续问“命令怎么用”。但没想到，出现了一个很有意思的问题：为什么 Linux 里全是这种奇怪的名字？ll 为什么等于 ls -l？grep 这个词到底怎么来的？能不能介绍一下这些名字的由来？今天这篇文章，我不讲怎么用。讲——这些名字...

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  1. CONNECT:[ UseTime:0.000621s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000862s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000356s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000308s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000532s ]
  6. SELECT * FROM `set` [ RunTime:0.000206s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000536s ]
  8. SELECT * FROM `article` WHERE `id` = 477510 LIMIT 1 [ RunTime:0.000379s ]
  9. UPDATE `article` SET `lasttime` = 1772233994 WHERE `id` = 477510 [ RunTime:0.011290s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.008492s ]
  11. SELECT * FROM `article` WHERE `id` < 477510 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.011233s ]
  12. SELECT * FROM `article` WHERE `id` > 477510 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004627s ]
  13. SELECT * FROM `article` WHERE `id` < 477510 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.022796s ]
  14. SELECT * FROM `article` WHERE `id` < 477510 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004242s ]
  15. SELECT * FROM `article` WHERE `id` < 477510 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001691s ]
0.135769s