whoami - Displays current username. id - Returns users identity hostname - Sets or prints the name of current host system. uname - Prints basic information about the operating system name and system hardware. pwd - Returns working directory name. ifconfig - The ifconfig utility is used to assign or to view an address to a network interface and/or configure network interface parameters. ip - Ip is a utility to show or manipulate routing, network devices, interfaces and tunnels. netstat - Shows network status. ss - Another utility to investigate sockets. ps - Shows process status. who - Displays who is logged in. env - Prints environment or sets and executes command. lsblk - Lists block devices. lsusb - Lists USB devices lsof - Lists opened files. lspci - Lists PCI devices.