sudo opinions

sudo EDITOR=vim visudo

Then:

1. Delete any Defaults requiretty line to avoid “you must have a tty to run sudo” errors
2. Let “sudo” group members sudo without password:

   -%sudo ALL=(ALL:ALL) ALL
   +%sudo ALL=(ALL:ALL) NOPASSWD: ALL
   

3. (On distros with systemd:) Add Defaults env_keep += "SYSTEMD_PAGER" to /etc/sudoers
   • Accompanied by separate:

     echo 'export SYSTEMD_PAGER=' | sudo tee /etc/profile.d/systemd_pager.sh
     

Adding a new user on linux

On the remote machine:

• adduser is an interactive perl script that asks for each detail of information incrementally
• useradd is the basic linux system command (non-interactive)
  • -m creates a home directory in some default location (see /etc/default/useradd for those defaults)
  • -U create a group of the same name as the user
  • -G group1,group2 csv of secondary groups
  • and then a username

sudo useradd -m -U -G wheel chbrown

And then maybe set the password:

sudo passwd chbrown

Return to the local machine. Copy default local public key to the remote machine:

ssh-copy-id chbrown@remote

Or if you don’t have ssh-copy-id:

1. On remote:

   mkdir -pm 700 ~/.ssh
   touch ~/.ssh/authorized_keys
   chmod 644 ~/.ssh/authorized_keys
   

2. On local:

   cat ~/.ssh/id_rsa.pub | ssh remote 'cat >> ~/.ssh/authorized_keys'