Try `wget --help' for more options.
root@vpn:~# https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocks
-bash: https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocks: No such file or directory
root@vpn:~# R.sh && chmod +x shadowsocksR.sh
-bash: R.sh: command not found
root@vpn:~# sudo -i
root@vpn:~# wget --no-check-certificate
wget: missing URL
Usage: wget [OPTION]... [URL]...
wget --no-check-certificate
https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocks
R.sh && chmod +x shadowsocksR.sh