SUBUID(5) File Formats and Conversions SUBUID(5)NAME
subuid - the subordinate uid file
DESCRIPTION
Each line in /etc/subuid contains a user name and a range of subordinate user ids that user is allowed to use. This is specified with three
fields delimited by colons (":"). These fields are:
o login name or UID
o numerical subordinate user ID
o numerical subordinate user ID count
This file specifies the user IDs that ordinary users can use, with the newuidmap command, to configure uid mapping in a user namespace.
Multiple ranges may be specified per user.
When large number of entries (10000-100000 or more) are defined in /etc/subuid, parsing performance penalty will become noticeable. In this
case it is recommended to use UIDs instead of login names. Benchmarks have shown speed-ups up to 20x.
FILES
/etc/subuid
Per user subordinate user IDs.
/etc/subuid-
Backup file for /etc/subuid.
SEE ALSO login.defs(5), newgidmap(1), newuidmap(1), newusers(1), subgid(5), useradd(8), userdel(8), usermod(8), user_namespaces(7).
shadow-utils 4.5 01/25/2018 SUBUID(5)
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SUBUID(5) File Formats and Conversions SUBUID(5)NAME
subuid - the subordinate uid file
DESCRIPTION
Each line in /etc/subuid contains a user name and a range of subordinate user ids that user is allowed to use. This is specified with three
fields delimited by colons (":"). These fields are:
o login name or UID
o numerical subordinate user ID
o numerical subordinate user ID count
This file specifies the user IDs that ordinary users can use, with the newuidmap command, to configure uid mapping in a user namespace.
Multiple ranges may be specified per user.
When large number of entries (10000-100000 or more) are defined in /etc/subuid, parsing performance penalty will become noticeable. In this
case it is recommended to use UIDs instead of login names. Benchmarks have shown speed-ups up to 20x.
FILES
/etc/subuid
Per user subordinate user IDs.
/etc/subuid-
Backup file for /etc/subuid.
SEE ALSO login.defs(5), newgidmap(1), newuidmap(1), newusers(1), subgid(5), useradd(8), userdel(8), usermod(8), user_namespaces(7).
shadow-utils 4.5 01/25/2018 SUBUID(5)
Hi,
I need to change some users login name in AIX. With solaris i donīt had problems, i have used "usermod". But in AIX the usermod command donīt have the same behavior. Can someone give me a tip on how to perform these changes?
Thanks in advance. (9 Replies)
I need help with extracting data from a large file ~900mb. Below is how the data looks like,
line number value
1001 10000
... ...
5001 50000
6001 60000
... ...
10001 100000
... ...
100001 ... (3 Replies)
Hi All
I need to get <STDIN> from a user. the <STDIN> is a range of number delimited by "," (comma) and can be with range delimited by "-".
Example: 1,2,3,4-9,12,15,34-36,70
Now I need to get this from the user and go on each number and "Do something"... but when trying to do this as above... (2 Replies)