github上传方法
git add .
git commit -m “notes”
git push -u origin master
github拉取远程仓库方法
git pull origin master
将远程指定分支拉取到本地当前分支
git pull origin :
ssh and scp
use ssh to connect to server
$ ssh <usr_name>@<ip_addr>
use scp to send file to server, open terminal in local machine
$ scp <local_file_addr> <usr_name>@
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