Swap Space in Linux

df -h
dd if=/dev/zero of=/swap1Gfile bs=2048 count=2097152
mkswap /swap1Gfile
 swapon -v /swap1Gfile
swapon -s


http://broexperts.com/2013/01/how-to-create-a-swap-storage-on-existing-file-system/

Timeout in Apache servers

timeout in  apache servers

Modify the time out property. Default value is 60, increase its value


 /etc/httpd/conf/httpd.conf changed from 60 to 600

Extract RPM packages

rpm2cpio mediawiki-1.15.1-50.fc11.src.rpm | cpio -idmv


http://www.wikihow.com/Extract-RPM-Packages

CentOS Version

cat /etc/redhat-release

Unsatisfied link error in Windows 8 when using native library

resolved this problem by updating to Visual C++ Redistributable Packages for Visual Studio 2013

Visual C++ Redistributable for VS2012 is not enough.

Ref:http://stackoverflow.com/questions/29471835/java-lang-unsatisfiedlinkerror-exception-when-using-tesseract-api-in-java

Remove a directory with content

 rm -rf Java

Copy a folder content to another

cp -a /home/cwdrappier/sumesh/tableauLinux/lib64/dataextract/*  /usr/share/apache-tomcat-7.0.64/webapps/demo/WEB-INF/classes/

-a recursive

Memory Usage in Linux

 cat /proc/meminfo

R Version in Linux

Login to linux
Connect to R
Type R.version.string