You will eventually find yourself trying to fix a network related problem which usually appears in one of two forms. The first is slow response times from the remote server, and the second is a complete lack of connectivity. These symptoms can be...
Recently I was tasked to install a free SSL certificate from LetsEncrypt on a local Linux machine that was running Zimbra Mail Server. The task seemed simple, and I had no problem generating and installing the certificate from LetsEncrypt on Linux...
If you want to share some of your pictures over the internet but you are worried that they might have metadata like location embedded in them, here’s how to strip that data out on Linux.
When you edit files using Vim, it makes .swp files in the same directory as the files you are editing, and these files contain all changes you've made.
Here is how to install PERCS (LSI) MegaCLI utility on a Dell machine: Step 1: Download the latest version of MegaCLI here or use this alternative link. Step 2: Copy the file to your Linux machine. In this case, I will use /var/tmp/ Step 3:...
Here is how to generate a random number in a bash shell script. In the bash shell we have environmental variable $RANDOM that can generate a unique random number each time it is referenced. echo $RANDOM And to assign this value to a variable :...
To install Node.js on CentOS perform (as root):
curl -sL | bash -
yum install -y nodejs
It will output each step as it moves along, prompting you to manually install any 3rd party dependencies.
Verify the install with:
node -v
stat prints file information, including last modified, changed or accessed time. On Unix systems every file has 4 timestamps: ctimechange time – when the file was modified, permissions changed, etc.atimeaccessed time – when file was read...
At the command line, run:
whatis <command>
This will give you a one-line summary of a command.
If whatis doesn’t work, the whatis database may not be built yet. To build the whatis database, enter this:
/usr/sbin/makewhatis
There are roughly the following types of inter-process communication under Linux: socketPipes (including anonymous pipes for parent and child processes, named pipes)SemaphoreShared memoryMessage queue socket Socket can be used for local inter...