Linux 技巧

For RedHat Enterprise Linux

系统

Locale

# show system locale
locale

# show system support locale
locale -a

# using utf-8 as system locale
export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8

# support Asia fonts
sudo yum groupinstall Fonts

Network

# check the listening ports and applications on Linux
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo nmap -sTU -O IP-address-Here

工具

Docker

# restart docker services
sudo systemctl stop docker
sudo systemctl daemon-reload
sudo systemctl start docker

# start docker, need to wait few minutes
sudo systemctl restart docker
docker-compose start

# stop docker
docker-compose stop

# stop and clear changes
docker-compose down
docker system prune -f

# start with images
docker-compose up -d

# Re-Install
## cd <compose configure path>
docker-compose down
docker system prune -f
# docker rm -fv $(docker ps -qa)
docker rmi $(docker images -q)
docker-compose pull
docker-compose up -d

# Login docker with root
docker exec -u 0 -it <container id> bash

# Enable docker ssh
docker exec <container id> /usr/sbin/sshd

tmux

有用的链接

什么是tmux

tmux 是一个多通道终端。最大的好处是：

可以避免终端中断带来的session中断

当运行tmux时，实际上会运行一个tmux service，保持session的运行。

tmux的提出的概念是 tmux / sessions * / windows + / panes + tmux可以管理多个sessions。一个session有多个windows。一个windows有多个panes。每个pane是一个终端。

安装

yum -y install tmux

tmux prefix

prefix 是一个重要的概念。它是一个tmux的快捷键，默认是[ctrl + b]。比如，退出tmux的命令是

tmux -detach

等价于 [ctrl + b, d]

配置文件

~/.tmux.conf

tmux 命令

Help

# list command
tmux list-command

# list shortcut keys
tmux list-keys

Sessions

command	shortcut key	meaning
tmux new-session -s [session name]		create an session
tmux attach-session -t [session name]		attach to an (or the only) session
tmux detach-session	prefix + d	detach with the current session
tmux list-sessions		list all sessions
tmux kill-session -t [session name]		kill a session

Windows

command	shortcut key	meaning
tmux list-windows		list all windows
tmux kill-window -t [window name]	prefix + &	kill a window

Panes

command	shortcut key	meaning
tmux split-window	prefix + %	new a horizontal pane
tmux split-window -v	prefix + "	new a vertical pane
tmux rotate-window	prefix + C-o	rotate panes
tmux select-pane -U	prefix + Up	select the up pane
tmux select-pane -D	prefix + Down	select the down pane
tmux select-pane -L	prefix + Left	select the left pane
tmux select-pane -R	prefix + Right	select the right pane
tmux resize-pane -U	prefix + C-Up	resize the up side
tmux resize-pane -D	prefix + C-Down	resize the down side
tmux resize-pane -L	prefix + C-Left	resize the left side
tmux resize-pane -R	prefix + C-Right	resize the right side
tmux list-panes		list all panes
tmux kill-pane -t [pane name]	prefix + x	kill a pane

Save sessions Installation with Tmux Plugin Manager (recommended) Add plugin to the list of TPM plugins in ~/.tmux.conf:

set -g @plugin 'tmux-plugins/tmux-resurrect'

Hit prefix + I to fetch the plugin and source it. You should now be able to use the plugin.

Key bindings prefix + Ctrl-s - save prefix + Ctrl-r - restore