bash技巧收集
**替换**
```
^^
# gerp root /etc/passwd
bash: gerp: 未找到命令...
相似命令是： 'grep'
# ^er^re
grep root /etc/passwd
root:x:0:0:root:/root:/bin/bash
operator:x:11:0:operator:/root:/sbin/nologin
# grep baash /etc/passwd
# ^a
grep bash /etc/passwd
root:x:0:0:root:/root:/bin/bash
ccic:x:1001:1001:CCIC:/home/ccic:/bin/bash
mysql:x:2010:2010::/home/mysql:/bin/bash
```
**引用文件名**
```
$ mv books.pdf Chapter-18-!#:1
mv books.pdf Chapter-18-books.pdf
$ cp books.pdf{,.bak}
$ mv test{.bak,.sh}
```
**命令行创建并编辑文件**
```
cat >test
111
222
333
```
**显示文本块**
```
# dmidecode | awk /Processor/,/Manuf/
Processor Information
Socket Designation: CPU 0
Type: Central Processor
Family: Other
Manufacturer: Bochs
Processor Information
Socket Designation: CPU 1
Type: Central Processor
Family: Other
Manufacturer: Bochs
```
**web服务器**
```
$ python -m SimpleHTTPServer
$ python3 -m http.server
```
**显示网络连接**
```
lsof -Pni
```
**比较本地与远程文件差异**
```
ssh linuxsvr cat /etc/passwd | diff /etc/passwd -
```
**生成N位随机密码**
```
openssl rand -base64 48 | cut -c1-N
gpw ()
{
openssl rand -base64 48 | cut -c1-${1};
}
gpw 10
```
**改密码**
```
echo "root:9rDsXRplZw" | sudo chpasswd
```