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| What is UID and GID in Linux ? |
What is UID and GID in Linux ?
What is UID in Linux ?
How to Default value of UID ?
What is differences of UID and GID ?
What is uid and gid for the root user?
UID : User Identifier
UID (User identifier)is a number that assigned by Linux to every user of the system. UIDs are stored in the /etc/passwd
Value of UID
0 to 99 value = System
100 to 499 = Reserved for dynamic allocation
500 / 1000 = Reserved for new users
How to Check Default UID Value ?
We can check default uid value by the command :
cat /etc/login.defs | grep UID
Output something like this
UID_MIN 1000
UID_MAX 60000
#SYS_UID_MIN 100
#SYS_UID_MAX 999
What is UID and GID of root User ?
root is the first user of the system so uid and gid is 0
GID : Group Identifier
All Groups of Linux are defined by GIDs (group IDs). GIDs are stored in the /etc/groups file. the first 100 GIDs are usually reserved for system use.
Difference UID and GID
UID
UID full form is User Identifier, It Used to assign a Identity Number of User
UID Store in /etc/passwd
GID
GID full form is Group Identifier, It Used to assign a Identity Number of Group
GID Store in /etc/group
Thanks
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