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…
Problem Description Mrs. Deli is running the delicatessen store "Deli Deli". Last year Mrs. Deli has decided to expand her business and build up an online store. She has hired a programmer who has implemented the online store. Recently some of h…
composing 来源——书籍Python.Crash.Course.2015.11 Using Individual Values from a List You can use individual values from a list just as you would any other vari-able. For example, you can use concatenation to create a message based ona value from a list. L…
profile 来源——linux系统文件名 [root@centos71 ~]# cat /etc/profile # /etc/profile # System wide environment and startup programs, for login setup # Functions and aliases go in /etc/bashrc # It's NOT a good idea to change this file unless you know what you #…
