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info@wlstack.com (WLSTACK) — Mon, 03 Apr 2023 00:00:00 +0000

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Linux Commands

info@wlstack.com (WLSTACK) — Wed, 14 Dec 2022 00:00:00 +0000

File

View File Content

head

Display the beginning of a file, default first 10 lines.

# Display first 10 lines
$ head README.md

# Or display multiple files
$ head README.md package.json

# -n specify number of lines to display
$ head -n 100 README.md

# File

## View File Content

## head

Display the beginning of a file, default first 10 lines.

```bash
# Display first 10 lines
$ head README.md

# Or display multiple files
$ head README.md package.json

# -n specify number of lines to display
$ head -n 100 README.md

## tail

显示文件的末尾部分，默认后 10 行

| 参数 | 描述 |
| ---- | ------------------------------------------ |
| -n | 指定显示末尾行数 |
| -f | 实时监听并打印文件变化, 文件删除后不在监听 |
| -F | 实时监听并打印文件变化, 文件删除后继续监听 |
| -c | 指定显示文件最后 N 个字符 |

```bash
# 默认显示末尾10行
$ tail README.md

# -n 指定显示末尾20行
$ tail -n 20 README.md

# 实时监听README.md文件变化
$ tail -f README.md

# 根据文件名进行追踪, 如果删除后创建相同的文件名会继续追踪
$ tail -F README.md

# 显示文件的最后10个字符
$ tail -c 10 README.md

cat

display file content。

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