Linux POSIX character set
[:alnum:] 字母与数字
[:alpha:] 字母
[:blank:] 空格与制表符
[:cntrl:] 控制字符
[:digit:] 数字
[:graph:] 可打印的与可见的（不包括空格）字符
[:lower:] 小写字符
[:print:] 可打印的字符（包括空白）
[:punct:] 标点
[:space:] 空白
[:upper:] 大写字符
[:xdigit:] 十六进制字符
Disclaimer
- License under
CC BY-NC 4.0 - Copyright issue feedback
me#imzye.me, replace # with @ - Not all the commands and scripts are tested in production environment, use at your own risk
- No privacy information is collected here