Software Development, Linux, and Windows

Notes on Software Development, Linux, and Windows

December, 2013

Change default version of java on CentOS

Perform these steps to change the default version of java: Login in or switch user to root: su – Type this command: alternatives –config java If you do not see the version you want listed then you must use the alternatives –install command, so your version of java can be “installed”. List the versions of [...]

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Fix error with making a screenshot in CentOS

Perform these steps if you are getting this error: Failed to execute child process “gnome-screenshot” (No such file or directory) Login in or switch user to root: su – Type this command: yum install gnome-utils -y

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Install Gnome System Monitor on versions of CentOS above 6.2

Perform these steps to install the Gnome System Monitor on CentOS versions above 6.2: Login in or switch user to root: su – Type this command: yum install gnome-system-monitor

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Install Development Tools and Development Libraries on CentOS

Perform these steps to install gcc, gdb, cpp, perl, and other standard linux development tools and libraries: Login in or switch user to root: su – Type this command: yum groupinstall ‘Development Tools’ ‘Development Libraries’

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How to list group names in Linux

To list the names of all defined groups, use this command: Type this command: cut -d: -f1 /etc/group

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