Some useful alias commands

Linux and MaxOSX's alias command usage skills

Because the gist is more powerful, it has to be put in the repo.

alias

Note: There can be no spaces on both sides of the equal sign;

can be placed ~/.bash_profilein the file;

# SYS ALIAS
# ll显示隐藏文件
alias ll='ls -lAF'

# docker 快捷命令
alias dc='docker-compose'

# 查看Linux端口监听
alias port='netstat -ntlp'

# 查看MAC端口号监听
alias port='sudo lsof -iTCP -sTCP:LISTEN -n -P'

# 统计git仓库的代码行数
alias lines='git ls-files | xargs wc -l | grep total'

# MAC清理DNS缓存
alias dns='sudo killall -HUP mDNSResponder'


# set history format
export HISTTIMEFORMAT='%F %T  '
export HISTSIZE=10000
export HISTIGNORE='pwd:ls:ll:history:exit'

Or put it ~/.bashrcin , such as suor sudo suor sudo sudo suIt will take effect when switching the root user.

For specific effective rules, please refer to: Bash startup environment

If you have a useful alias, welcome to add: pr, wiki, comment are all fine.

shell

One shell command per day:

# 每日一个shell命令
cncounter:CODE_ALL renfufei$ type ls
ls is hashed (/bin/ls)
cncounter:CODE_ALL renfufei$ type ll
ll is aliased to 'ls -lAF'
cncounter:CODE_ALL renfufei$ type echo
echo is a shell builtin
cncounter:CODE_ALL renfufei$ type java
java is /Users/renfufei/.jenv/shims/java
cncounter:CODE_ALL renfufei$ which java
/Users/renfufei/.jenv/shims/java
cncounter:CODE_ALL renfufei$ whereis java
/usr/bin/java

Shell shortcut key (note that the default is not the shortcut key of vi/Vim, but the shortcut key of emacs):


- 清理屏幕`clear`: 使用 `Ctrl` + `l`
- 光标退回行首`ahead`: 使用 `Ctrl` + `a`
- 光标退回行尾`end`: 使用 `Ctrl` + `e`


- 从历史记录查找`research?`: `Ctrl + r` 进入, 然后输入模糊搜索字符串, 可再次使用 `Ctrl + r` 往前查找;

Vim快捷键:

- 光标退回行首: 在命令模式下输入数字 `0`
- 光标退回行尾: 在命令模式下输入数字 `$`

sudo password-free

Modify /etc/sudoersthe file to add the corresponding username and NOPASSWD:flag.

% sudo cat /etc/sudoers
#
# Sample /etc/sudoers file.
#
# This file MUST be edited with the 'visudo' command as root.

##
# User specification
##

# root and users in group wheel can run anything on any machine as any user
#root		ALL = (ALL) ALL
#%admin		ALL = (ALL) ALL

# 免密SUDO, 改成类似这样的格式
root		ALL = (ALL) NOPASSWD:ALL
renfufei	ALL = (ALL) NOPASSWD:ALL
%admin		ALL = (ALL) NOPASSWD:ALL

After modification, use to :wq!save. Just re-enable the shell.

System tool installation

# 安装域名bind查询工具
yum -y install bind-utils

# 安装网络监控检测工具
yum -y install net-tools

# 安装系统状态监控工具
yum -y install sysstat

Set the interface color of the top tool

First execute the top command:

top

Enter the display interface of the top command.

Enter the color setting interface:

In the display interface of the top command, use the command Shift + z; to enter the color setting interface.

Modify color:

In the color setting interface, according to the prompt, the parts that can be set include:

1. Target, that is, which part of the color is set, we can switch between different setting targets by inputting uppercase Sand etc.T
1. Which color to use for the target, 0-7just enter it.
1. After setting a color, you can switch between different setting targets through the command in step 1.
1. End the setting; enter to Enterexit the setting interface.
1. This step also supports aor wto switch various colors, which is not very easy to use;

After this setting, return to the display interface of the top command. Note that there is no persistent save setting here

Persistence save settings:

In the display interface of the top command, use the command Shift + W; to persist the settings.

Set the color of the command prompt

Zsh settings under MAC:

cat ~/.zshrc

autoload -U colors && colors
PS1="%{
    
    $fg[green]%}%n%{
    
    $reset_color%}@%{
    
    $fg[green]%}%m %{
    
    $fg[yellow]%}%~ %{
    
    $reset_color%}%% "

Settings under Linux:

cat ~/.bashrc
# .bashrc

# set shell prompt
# https://wangdoc.com/bash/prompt.html
PS1="\[\e[31;1m\][\u@\h \W ]$ \[\e[0m\]"

.bashrcThe difference with .bash_profileis that the file suwill not be automatically executed when switching users .bash_profile;

Reference: https://stackoverflow.com/questions/689765/

dns


# CentOS查询哪个工具包支持nslookup
yum provides nslookup

# CentOS系统安装nslookup工具
yum -y install bind-utils

# 查看帮助
man nslookup


# DNS查询工具: nsloopup
$ nslookup www.cncounter.com
Server:		114.114.114.114
Address:	114.114.114.114#53

Non-authoritative answer:
Name:	www.cncounter.com
Address: 8.210.93.167

# DNS查询工具: host
$ host www.cncounter.com
www.cncounter.com has address 8.210.93.167

# DNS查询工具: dig
$ dig github.com

; <<>> DiG 9.10.6 <<>> github.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63069
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;github.com.			IN	A

;; ANSWER SECTION:
github.com.		47	IN	A	20.205.243.166

;; Query time: 81 msec
;; SERVER: 114.114.114.114#53(114.114.114.114)
;; WHEN: Fri Feb 25 10:48:10 CST 2022
;; MSG SIZE  rcvd: 55

MAC related

Unlock download software source restrictions:

sudo spctl --master-disable