来源——tr帮助说明 TR() User Commands TR() NAME tr - translate or delete characters SYNOPSIS tr [OPTION]... SET1 [SET2] DESCRIPTION Translate, squeeze, and/or delete characters from standard input, writing to standard output. 翻译 n. 性格,品质:特性:角色:[计] 字符 vt. 印,刻…
escapes 来源 [root@centos7 ~]# help echo echo: echo [-neE] [arg ...] Write arguments to the standard output. Display the ARGs on the standard output followed by a newline. Options: -n do not append a newline -e enable interpretation of the following ba…