It is a number of open file descriptors per process. They can all refer to the same file, or different files. It prevent single users from using too many system resources.
How can is check ulimit in current shell?
ulimit -a command from terminal.
Output of the above command:
How to set ulimit in current shell?
ulimit -n {$no of files}
ulimit -n 65535 ;
How to set ulimit permanent?
For the ulimits to persists across reboots we need to set the ulimit values in the configuration file
/etc/security/limits.conf.
Format ->
#[domain] [type] [item] [value]
domain → a user name or group name
type -> can have the two values (soft| hard)
item -> the property to set
value -> value of the property.
user root:
all users:
How to set ulimit in Docker?
Due to some security reason. docker currently not extends host ulimit property.
There are couple of ways to set following are the ways:
- The latest docker supports setting ulimits through the command line and the API. For instance, docker run takes — ulimit <type>=<soft>:<hard> .
- set ulimit -n 65535 in the file /etc/init.d/docker