basic-commands.md

use netcat to check if connection established

nc is the command which runs netcat, a simple Unix utility that reads and writes data across network connections, using the TCP or UDP protocol. It is a feature-rich network debugging and exploration tool

nc -l localhost:8080 

fix brew install not writable problem

sudo chown -R `whoami`:admin /usr/local/bin

copy file to remote host

scp ./config.yml streaming-util-2001.node.ad2.r1:<your path>

Sublime Text 3 configuration

• How to change default code snippets in Sublime Text 3

generate PEM key

## create private key
openssl genrsa -out ~/.ssh/zhenlu_key.pem 2048

## change the privilage
chmod go-rwx ~/.ssh/zhenlu_key.pem

##
openssl rsa -pubout -in ~/.ssh/zhenlu_key.pem -out ~/.ssh/zhenlu_key_public.pem

ssh key

• generate ssh key

ssh-keygen -t rsa -b 4096

• Ensure ssh-agent is enabled

eval "$(ssh-agent -s)"

• load the private key

ssh-add ~/.ssh/id_rsa

• copy to clipboard

pbcopy < ~/.ssh/id_rsa.pub

Mac OS terminal

configuration

Add the following lines to ~/.bash_profile

# bash color
export CLICOLOR=1
export LSCOLORS=gxBxhxDxfxhxhxhxhxcxcx
# export PS1='\[\e[0;33m\]\h:\[\e[0;32m\]\W \[\e[0;33m\]\u\$\[\e[0m\] '
export PS1="\[\e[0;33m\]\h:\[\e[0;32m\]\W\$(parse_git_branch) \[\e[0;33m\]\u\$\[\e[0m\] "

# git branch info
parse_git_branch() {

git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'

}

display running process

ps -e will list all the running process. or, use top -o cpu will lively display the process info order by cpu usage.

Open iBook folder

open ~/Library/Mobile\ Documents/iCloud\~com\~apple\~iBooks/Documents

Intellij 注册码

支持正版