General Linux

Useful commands

• Specify hostname within /etc/hostname
• Customize terminal prompt by setting PS1 environment variable (e.g., from within ~/.bashrc)
• Create a user:
  • # useradd -m REPLACEME
  • # passwd REPLACEME
  • # usermod -aG sudo REPLACEME (gives sudo privileges)
  • # usermod -aG dialout REPLACEME (allows running minicom as a normal user by setting appropriate permissions for accessing /dev/ttyUSB* devices)
  • # usermod -s /bin/bash REPLACEME
• Remove a user:
  • # userdel -r REPLACEME
• Setup ssh for a user who provides you their id_rsa.pub:
  • # mkdir /home/REPLACEME/.ssh/
  • # echo 'Replace this string with contents of id_rsa.pub' > /home/REPLACEME/.ssh/authorized_keys
  • # chown -R REPLACEME:REPLACEME /home/REPLACEME/.ssh
  • # chmod -R 0700 /home/REPLACEME/.ssh

Useful applications

• Install Terminator # apt-get install terminator
  
  
• Install minicom using # apt-get install minicom
• Install gparted using # apt-get install gparted
• Install tftp server using # apt-get install tftpd-hpa