base64 [OPTION]... [FILE]...
!subtitle:功能
进行 BASE64 编码或解码。
!subtitle:类型
可执行文件（/usr/bin/base64），属于 coreutils。
!subtitle:参数
OPTION 选项：
-d, --decode - 解码；不带此选项则为编码
-i, --ignore-garbage - 解码时忽略无效字符
-w, --wrap=COLS - 编码输出时一行的字符数；默认为 76，设为 0 则不换行
--help - 显示帮助
--version - 显示版本
FILE - 文件列表
$ man base64 > 1.txt
$ cat 1.txt
BASE64(1) User Commands BASE64(1)
NAME
base64 - base64 encode/decode data and print to standard output
SYNOPSIS
base64 [OPTION]... [FILE]
...
$ base64 1.txt > 2.txt # 编码
$ cat 2.txt
QkFTRTY0KDEpICAgICAgICAgICAgICAgICAgICAgICAgVXNlciBDb21tYW5kcyAgICAgICAgICAg
ICAgICAgICAgICAgQkFTRTY0KDEpCgpOQU1FCiAgICAgICBiYXNlNjQgLSBiYXNlNjQgZW5jb2Rl
L2RlY29kZSBkYXRhIGFuZCBwcmludCB0byBzdGFuZGFyZCBvdXRwdXQKClNZTk9QU0lTCiAgICAg
ICBiYXNlNjQgW09QVElPTl0uLi4gW0ZJTEVdCgpERVNDUklQVElPTgogICAgICAgQmFzZTY0IGVu
...
$ base64 -d 2.txt # 解码
BASE64(1) User Commands BASE64(1)
NAME
base64 - base64 encode/decode data and print to standard output
SYNOPSIS
base64 [OPTION]... [FILE]
...
| 命令 | 说明 |
|---|---|
| base32 | 进行 BASE32 编码或解码 |
| basenc | 进行 BASE2 BASE16 BASE32 BASE64 编码或解码 |
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 re‐
cover 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 © 2023 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 permitted by law.
SEE ALSO
basenc(1)
Full documentation <https://www.gnu.org/software/coreutils/base64>
or available locally via: info '(coreutils) base64 invocation'
GNU coreutils 9.4 April 2024 BASE64(1)