[memo] How to check max open files(file descriptors) in Linux

Entire OS

cat /proc/sys/fs/file-max

Max open file number of each process

ps aux | grep glassfish
#find process id(pid)
grep "open files" /proc/10244/limits
Max open files            65535                65535                files

[memo] How to delete all jobs of jenkins

Delete all jobs

Go to the following URL.
http://your.jenkins.url/script

And input the following script

for(j in jenkins.model.Jenkins.getInstance().getProjects()) {
    j.delete();
}

http://stackoverflow.com/questions/5076246/hudson-ci-how-to-delete-all-jobs