chroot (change root) is an isolation facility towards a process from Linux kernel. chroot changes the root (/) filesystem for one process into another directory. People calls chroot as jail, an environment when a process works only inside and can't see outside. In practice, creating a chroot environment is likely copying a program and its dependencies inside a directory then performing chroot command. In other words, chroot is likely creating a little clone of whole original system inside a directory. In Linux, chroot needs root user. You will see it. I will tell how to do chroot for bash by example. This tutorial is applicable to another Linux distributions such as Linux Mint or Debian.