77 lines
2.0 KiB
Groff
77 lines
2.0 KiB
Groff
.TH LIMITS 5
|
|
.SH NAME
|
|
limits \- Resource limits definition
|
|
.SH DESCRIPTION
|
|
The
|
|
.I limits
|
|
file (/etc/limits by default or LIMITS_FILE defined config.h)
|
|
describes the resource limits you wish to impose.
|
|
It should be owned by root and readable by root account only.
|
|
.PP
|
|
By default no quotas are imposed on 'root'. In fact, there is no way to impose
|
|
limits via this procedure to root-equiv accounts (accounts with UID 0).
|
|
.PP
|
|
Each line describes a limit for a user in the form:
|
|
.sp
|
|
.I user LIMITS_STRING
|
|
.PP
|
|
The \fBLIMITS_STRING\fP is a string of a concatenated list of resource limits.
|
|
Each limit consists of a letter identifier followed by a numerical limit.
|
|
.PP
|
|
The valid identifiers are:
|
|
.sp
|
|
A: max address space (KB)
|
|
.br
|
|
C: max core file size (KB)
|
|
.br
|
|
D: max data size (KB)
|
|
.br
|
|
F: maximum filesize (KB)
|
|
.br
|
|
M: max locked-in-memory address space (KB)
|
|
.br
|
|
N: max number of open files
|
|
.br
|
|
R: max resident set size (KB)
|
|
.br
|
|
S: max stack size (KB)
|
|
.br
|
|
T: max CPU time (MIN)
|
|
.br
|
|
U: max number of processes
|
|
.br
|
|
K: file creation mask, set by \fBumask\fR(2).
|
|
.br
|
|
L: max number of logins for this user
|
|
.br
|
|
P: process priority, set by \fBsetpriority\fR(2).
|
|
.PP
|
|
For example, \fIL2D2048N5\fP is a valid \fBLIMITS_STRING\fP. For reading convenience,
|
|
the following entries are equivalent:
|
|
.sp
|
|
username L2D2048N5
|
|
.br
|
|
username L2 D2048 N5
|
|
.PP
|
|
Be aware that after \fIusername\fP the rest of the line is considered a limit
|
|
string, thus comments are not allowed. A invalid limits string will be
|
|
rejected (not considered) by the login program.
|
|
.PP
|
|
The default entry is denoted by username "\fB*\fP". If you have multiple \fIdefault\fP
|
|
entries in your \fBLIMITS_FILE\fP, then the last one will be used as the default
|
|
entry.
|
|
.PP
|
|
To completely disable limits for a user, a single dash "\fB-\fP" will do.
|
|
.PP
|
|
Also, please note that all limit settings are set PER LOGIN. They are
|
|
not global, nor are they permanent. Perhaps global limits will come, but
|
|
for now this will have to do ;)
|
|
.SH FILES
|
|
/etc/limits
|
|
.SH SEE ALSO
|
|
.BR login (1),
|
|
.BR setpriority (2),
|
|
.BR setrlimit (2)
|
|
.SH AUTHOR
|
|
Cristian Gafton (gafton@sorosis.ro)
|