Installing Jenkins stable on RHEL7 minimal

Install prerequisites:

yum install java-1.8.0-openjdk-headless dejavu-sans-fonts fontconfig

Install Jenkins stable repo:

cd /etc/yum.repos.d/
curl -O
rpm --import

Install Jenkins:

yum install jenkins

Set Jenkins service to start at startup:

systemctl enable jenkins.service

Start Jenkins service:

systemctl start jenkins.service


/usr/bin/ld: cannot find -lz


/usr/bin/ld: cannot find -lz


yum install zlib-static


/usr/bin/ld: cannot find -lpthread


yum install glibc-static


/usr/bin/ld: cannot find -lstdc++


yum install libstdc++-static

If you are using RHEL7, these are in the rhel-x86_64-server-optional-7 channel.


How Does Hyperthreading Affect an ALLPATHS-LG Run?

In running ALLPATHS-LG, a short read genome assembler, on a Dell PowerEdge R920 with four Xeon E7-4860v2 processors running at 2.60GHz, I did one run with hyperthreading on and one with hyperthreading off. This was mainly to see if the increased cache size on the physical CPU core with hyperthreading off had a positive effect on performance.

I'll take all the anticipation away: Nope. Hyperthreading wins.

How to Install Canon ip4000R Wireless Printer Driver on OS X 10.9

We have a wireless Canon PIXMA ip4000R printer that has served us well. However, a new computer with OS X 10.9 Mavericks did not recognize it, and Canon did not have a driver for it.

I ended up moving the following components from an existing computer on which the printer was already working:


I fixed the permissions:


Subscribe to SysArchitects RSS