Category Archives: Basics
Shell has several special positional parameters which can be referenced but can not be assigned. These are used to process command line arguments in a shell script, to get process status, exit status and options flag.
These positional parameters can be assigned to a variable and values can be used for further processing.
$0 , $1 $2 $3 … parameters
These are special parameters and and has specific meaning according to the number. These parameters are useful if you want to validate executing file name and do the processing based on the arguments.
$0 : Shell argument 0, It expands into bash script file name or bash shell.
$1 $2 $3 … : Shell argument number : Used to get the specific argument from the script.
for example let’s create & execute the test script with some parameters :
find command is one of the important command in Unix and Linux used to locate the program, text, data , log config files for execution, viewing , editing renaming deleting etc. etc.
find command can find files based on many file attributes besides just the file name and here are the fifteen file attributes which you can use to find a file or files and here are 14 ways to find files in your unix and linux system.
Installation and Configuration of RHEL 7.x
Learn about Installation and initial configuration of Red Hat Enterprise Linux, RHEL 7.3
For this Linux step by step installation guide we will use RHEL 7.3 64Bit iso image, the installation procedure is same for all RHEL 7.x releases in case you want to use a different RHEL version to install.
Here are the 10 Steps to Install RHEL 7.x distribution.
netstat is a command line utility in Unix, Linux and Unix like systems to show information about
- network connections,
- routing tables,
- interface statistics,
- mas-querade connections
- multicast memberships
By default, netstat displays a list of open sockets of all configured address families , tcp , udp etc.
netstat provide very extensive network details and here are the top netstat usage with different options to get you the just the information you need.
Strategy, business models, and tactics are often used interchangeably but they differ slightly in their actual meaning. Business model is the means of identifying a solution’s key offerings that will make customers pay for the product/service.
Business model is defined at the outset, when the enterprise mobility solutions are discussing a potential application idea. It is crucial to get all aspects of the business model right, and the ambiguities (if any) listed and categorized as ‘needed to be addressed before development’ or ‘can be expounded on later’.