Linux bash sed command All In One

Linux bash sed command All In One

sed

sed, a stream editor

sed，流编辑器

awk, Perl, gawk

https://www.gnu.org/software/sed/manual/sed.html

# sed SCRIPT INPUTFILE...

# to replace all occurrences of ‘hello’ to ‘world’ in the file input.txt:

$ sed 's/hello/world/' input.txt > output.txt

# The following commands are equivalent:

$ sed 's/hello/world/' input.txt > output.txt

$ sed 's/hello/world/' < input.txt > output.txt

$ cat input.txt | sed 's/hello/world/' - > output.txt

Linux 命令行编辑器

sed & gawk

???

vi
vim
nano

emacs

https://www.gnu.org/software/emacs/

http://www.hypexr.org/bash_tutorial.php#emacs

Linux sed 命令

Linux sed 命令是利用脚本来处理文本文件。

sed 可依照脚本的指令来处理、编辑文本文件。

Sed 主要用来自动编辑一个或多个文件、简化对文件的反复操作、编写转换程序等。

# 语法
$ sed [-hnV][-e<script>][-f<script文件>][文本文件]

https://www.runoob.com/linux/linux-comm-sed.html

https://www.computerhope.com/unix/used.htm

macOS bug

$ man sed

$ sed --help
sed: illegal option -- -
usage: sed script [-Ealnru] [-i extension] [file ...]
        sed [-Ealnu] [-i extension] [-e script] ... [-f script_file] ... [file ...]

$ sed --version
sed: illegal option -- -
usage: sed script [-Ealnru] [-i extension] [file ...]
        sed [-Ealnu] [-i extension] [-e script] ... [-f script_file] ... [file ...]

sed API

参数名称	参数描述
-e	指定 sed 脚本命令, 多个 sed 命令使用 ; 分隔
-f	指定 sed 脚本文件 .sed 扩展名
-n	sed 禁用 STDOUT 输出

# 接受 `STDIN` 作为输入
$ echo "this is abc" | sed -e 's/abc/xyz/'

$ echo "this is abc" | sed -e 's/abc/xyz/' -n

# 读取文件，返回 `STDOUT` 作为输出
$ sed -e 's/abc/xyz/' ./test.txt

# ✅ -n filename
$ sed -e 's/abc/xyz/' -n ./test.txt 

# ❌ filename -n 
$ sed -e 's/abc/xyz/' ./test.txt -n 

# 多个 sed 命令使用 `;` 分隔, 分号与前面的斜线之间不能有空格 ❓
$ echo "this is CBA and China" | sed -e 's/CBA/NBA/; s/China/USA/'

# 分号与前面的斜线之间有空格 ✅
$ echo "this is CBA and China" | sed -e 's/CBA/NBA/ ; s/China/USA/'

# 执行 sed 脚本，sed 后面指定文件名写在命令行里
$ sed -f test.sed ./test.txt

$ sed -f test.sed ./test.txt >> ./test.out.md

# ✅ -n 
$ sed -f test.sed  -n ./test.txt
# ❌ -n
$ sed -f -n test.sed ./test.txt

# 注释: `.sed`扩展名的文件，是 sed 命令集合专用的，本质上还是一种 shell scirpt
# 无需写 sed 和 文件名了，因为`.sed`扩展名的文件中是纯 sed 命令
s/abc//
s/xyz//
s/ufo//


# 执行 sed 脚本，sed 后面指定文件名写在命令行里
# $ sed -f test.sed ./test.txt
# $ sed -f test.sed -n ./test.txt
# $ sed -f test.sed ./test.txt >> ./test.out.md

# sed: 12: test.sed: invalid command code <
# <<EOF

# s/abc/xyz/ test.txt
# sed: 4: test.sed: bad flag in substitute command: 't'

# s/abc/xyz/ ./test.txt
# sed: 4: test.sed: bad flag in substitute command: '.'

# 's/abc/xyz/' ./test.txt
# sed: 4: test.sed: invalid command code ' ❌

# sed -e 's/abc/xyz/' ./test.txt
# sed: 2: test.sed: bad flag in substitute command: 's' ❌

# sed -e 's/abc/xyz/' -n ./test.txt

# EOF

1. 替换 s

substitute

2. 插入i 和追加 a

insert / append

3. 删除 d

delete

4. 读取 r

read

5. 写入 w

write

6. 打印 p

print

正则表达式

demos

git hooks

commit-msg

#!/bin/sh
#
# An example hook script to check the commit log message.
# Called by "git commit" with one argument, the name of the file
# that has the commit message.  The hook should exit with non-zero
# status after issuing an appropriate message if it wants to stop the
# commit.  The hook is allowed to edit the commit message file.
#
# To enable this hook, rename this file to "commit-msg".

# Uncomment the below to add a Signed-off-by line to the message.
# Doing this in a hook is a bad idea in general, but the prepare-commit-msg
# hook is more suited to it.
#
# SOB=$(git var GIT_AUTHOR_IDENT | sed -n 's/^\(.*>\).*$/Signed-off-by: \1/p')
# grep -qs "^$SOB" "$1" || echo "$SOB" >> "$1"

# This example catches duplicate Signed-off-by lines.

test "" = "$(grep '^Signed-off-by: ' "$1" |
	 sort | uniq -c | sed -e '/^[ 	]*1[ 	]/d')" || {
	echo >&2 Duplicate Signed-off-by lines.
	exit 1
}

XSS

#!/bin/bash

sed -i "s/xssor.io/$1/g" xssor/payload/probe.js

python3 manage.py runserver 0.0.0.0:8000

https://github.com/evilcos/xssor2/blob/master/run.sh

refs

https://www.cnblogs.com/xgqfrms/tag/sed

https://www.cnblogs.com/xgqfrms/p/16243419.html

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