Set the environment variable command in Linux -- export

In Linux, set the environment variable command -- export Syntax: export [-p] [variable name] = [variable setting value] parameter description: [-p] lists all environment variables that the shell assigns to the program. Command: displays or sets environment variables. Example: export PATH =/mnt/updata/mips-4.3/bin: $ PATH # This statement sets the system variable, followed ": $ PATH "is added after the system variable. Export RUA_DIR =/mnt/updata/mrua_SMP8654F_3_7_0_dev.mips/MRUA_src # is used to set user variables, which is equivalent to setting system variables in windows. Instructions for use: When executing a program in shell, shell provides a set of environment variables. Export allows you to add, modify, or delete environment variables for subsequent programs. The effect of export is only true for this login operation.