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Process Attributes
PID
or process ID, an integer.PPID
or parent process ID, an integer.- Nice number, the degree of friendliness of the process towards other processes (process priority is calculated from nice numbers and recent CPU usage).
- TTY, the terminal to which the process is connected.
RUID
, or real user ID. The user issuing the command.EUID
, or effective user ID. The one determining access permissions to system resources.RGID
, or real group owner. The group of the user who started the process.EGID
, or effective group owner. Different fromRGID
whenSGID
has been applied to a file.