Linux shell command base64 All In One
email address encryption / 邮箱地址加密
应用场景
防止爬虫爬取邮箱地址发送垃圾邮件
base64 encode & decode
$ base64 --version
base64 (GNU coreutils) 8.32
Copyright (C) 2020 Free Software Foundation, Inc.
许可证 GPLv3+：GNU 通用公共许可证第 3 版或更新版本<https://gnu.org/licenses/gpl.html>。
本软件是自由软件：您可以自由修改和重新发布它。
在法律范围内没有其他保证。
由Simon Josefsson 编写。
$ base64 --help
用法：base64 [选项]... [文件]
使用 Base64 编码/解码文件或标准输入输出。
如果没有指定文件，或者文件为"-"，则从标准输入读取。
必选参数对长短选项同时适用。
-d, --decode 解码数据
-i, --ignore-garbag 解码时忽略非字母字符
-w, --wrap=字符数 在指定的字符数后自动换行(默认为76)，0 为禁用自动换行
--help 显示此帮助信息并退出
--version 显示版本信息并退出
数据以 RFC 4648 规定的 base64 字母格式进行编码。
解码时，输入数据（编码流）可能包含一些非有效 base64 字符以及换行符。
可以尝试用 --ignore-garbage 选项来绕过编码流中的无效字符。
GNU coreutils 在线帮助：<https://www.gnu.org/software/coreutils/>
请向 <http://translationproject.org/team/zh_CN.html> 报告任何翻译错误
完整文档 <https://www.gnu.org/software/coreutils/base64>
或者在本地使用：info '(coreutils) base64 invocation'
https://www.gnu.org/software/coreutils/base64
https://www.gnu.org/software/coreutils/
http://translationproject.org/team/zh_CN.html
$ man base64
BASE64(1) User Commands BASE64(1)
NAME
base64 - base64 encode/decode data and print to standard output
SYNOPSIS
base64 [OPTION]... [FILE]
DESCRIPTION
Base64 encode or decode FILE, or standard input, to standard output.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
-d, --decode
decode data
-i, --ignore-garbage
when decoding, ignore non-alphabet characters
-w, --wrap=COLS
wrap encoded lines after COLS character (default 76). Use 0 to disable line wrapping
--help display this help and exit
--version
output version information and exit
The data are encoded as described for the base64 alphabet in RFC 4648. When decoding, the input may contain
newlines in addition to the bytes of the formal base64 alphabet. Use --ignore-garbage to attempt to recover
from any other non-alphabet bytes in the encoded stream.
AUTHOR
Written by Simon Josefsson.
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
COPYRIGHT
Copyright © 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later
<https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent per‐
mitted by law.
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/base64>
or available locally via: info '(coreutils) base64 invocation'
GNU coreutils 8.32 September 2020 BASE64(1)
Manual page base64(1) line 1/51 (END) (press h for help or q to quit)
demos
# encode / 加密
$ echo "[email protected]" | base64
eGdxZnJtc0B4Z3Fmcm1zLnh5ego=
# decode / 解密
$ echo "eGdxZnJtc0B4Z3Fmcm1zLnh5ego=" | base64 --decode
# alias
$ echo "eGdxZnJtc0B4Z3Fmcm1zLnh5ego=" | base64 -d
