linux：export命令

[root@rockylinux ~]# 
[root@rockylinux ~]# export --help
export: export [-fn] [name[=value] ...] or export -p
    Set export attribute for shell variables.
    
    Marks each NAME for automatic export to the environment of subsequently
    executed commands.  If VALUE is supplied, assign VALUE before exporting.
    
    Options:
      -f        refer to shell functions
      -n        remove the export property from each NAME
      -p        display a list of all exported variables and functions
    
    An argument of `--' disables further option processing.
    
    Exit Status:
    Returns success unless an invalid option is given or NAME is invalid.
[root@rockylinux ~]# 
[root@rockylinux ~]#