Linux

Linux

Add new user, allow only ssh login and disable root login

create new user and give sudo rights

sudo adduser userNameHere

• give sudo rights: usermod -aG sudo username
• check if successful: sudo whoami should return sudo

Enable ssh key login on remote server

• on local machine: ssh-keygen -d
• copy public key: /home/$USERNAME/.ssh/id_rsa.pub
• add public key on remote server to: /home/$USERNAME/.ssh/authorized_keys
• edit /etc/ssh/sshd_config
  • enable: AuthorizedKeysFile %h/.ssh/authorized_keys
  • update:

 IgnoreUserKnowHosts yes
 ChallengeResponseAuthentication no
 PasswordAuthentification no

• only allow user loging:

PasswordAuthentication no
PermitRootLogin no
AllowUsers %USERNAME

• restart: /etc/init.d/ssh restart

How to Tell What Distro and Version of Linux You Are Running

• see the Linux distribution name and the version number

cat /etc/issue

• See the Kernel Version

uname -r

Access usb drive from terminal

1. Find what the drive is called

lsblk
//or
blkid
//or
fdisk -l

2. Create a mount point

mkdir /media/usb

3. Mount/Unmount

//sdb1 is the name found in step 1
mount /dev/sdb1 /media/usb
umount /media/usb

Resize Partition