Recently I was trying to run doxygen on a new machine and got this error :
1 | sh: dot: command not found |
After some googling I realized I was missing graphviz dot, so a simple yum install graphviz fixed it right up. Refhat, centos, rhel
1 | yum install graphviz |
Debian, Ubuntu, Mint etc
1 | apt-get install graphviz |
This will install graphviz dot and get rid of […]
On one of my servers I needed extra swap space because the datacenter screwed up the partitioning and I didn’t have time to reimage the machine. so an easy way to add swap after partitioning is just to add it via a new file on any partition. lets say you want to add 8GB of […]
Mysql tuner telling you to optimize your tables? or you just happen to be bored? Mysql optimize Reorganizes the physical storage of table data and associated index data, to reduce storage space and improve I/O efficiency when accessing the table. The exact changes made to each table depend on the storage engine used by that […]
Got an RPM laying about you need to install but it has a bunch of dependencies? well let yum do the heavy lifting.
1 | yum --nogpgcheck localinstall SomeApp.noarch.rpm |
I just noticed I had 8 kernels installed on a machine. dont need but one…. so I rebooted to make sure I was using the newest, and removed all the old ones via these simple commands : Ubuntu / Debian / dpkg / Apt:
1 | dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge |
Thats a one liner, so just copy paste the […]
We recently moved a hosting to a new data center and wanted to test speeds, so I needed fixed size files to see what kind of speeds people could achieve while downloading them. I decided on the arbitrary numbers of 100MB and 500MB. Heres how I generated fixes size files via bash. for 500 MB […]