69. Common Linux Shell functions, tail

1. Tail-output the last part of Files

Tail [Option] [+/-num]... [file]...

2. Option

①-F,: Output appended data as the file grows;

②-S,: With-F, sleep for S seconds (default 1.0) between iterations.

③-N,: output the last n lines, instead of the last 10

④-C: output the last n Bytes

The second is commonly used for tracking logs to display new log information.

Note:

①+ Num is displayed after row num.

②-Num is displayed starting from the num row at the end of the file.

3. Example

Tail-N 3 File // equivalent to tail-3 File

Tail-N + 3 File // displayed after line 1, tail + 3 File

Tail-F File

Tail-F-S 2 File

Reference

[1]Http://linux.die.net/man/1/tail

[2]Https://wangyan.org/blog/linux-head-tail.html

[3]Http://blog.csdn.net/carzyer/article/details/4759593