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ls command

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About ls command full form = list  With the help of ls command, list the contents present inside the directory.  Command: ls [OPTION] [FILE_PATH] Note: Default value of FILE_PATH is current working directory. Some useful options with examples are given below - 1. ls  :  Lists files and directories present inside a directory with no options. 2. ls -a (or ls --all):  Some files are hidden inside the directory, they are called hidden files. In such a situation, with the help of  -a(--all) option, you can list all types of files whether hidden or not. OR   When we ran ls command then .f.txt , .k.txt files and .game directory were not display but with the help of -a( --all)  option all files are display. 3. ls -l :  With the help of this command, the files present inside the directory can be displayed in long format.   Several columns are visible here, the first character of the first column indicates the type of file. The file types a...
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wc Command

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WC Command This command is one of the daily use commands in Linux operating system, it should be known to every Linux user.  With the help of this command, we can find out how many newlines, words and bytes are present in the file. Suntax : $wc [OPTION].... [FILE] ...... FILE :- Here we write the name of the file for which we want to find the number of newlines, words or bytes. OPTION :- In this, we write the name of the options, which tell that after all we have to find the number of newlines, number of words or number of bytes of that file.    There are many options of this command, we will know all these options in turn, as well as tell about how to use it.  OPTIONS :- * -c (or --bytes ) :-  It is used to find the size of the file in bytes. * -m (or --chars) :-  Used to find the number of characters present in the file. * -l ( or --lines) :-  It is used to find the number of newlines in a file. * -L (or --max-line-length ) :- It is used to find the ...
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ifconfig command

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Ifconfig command :-  Whenever we connect one computer to another computer or other device, then we need IP address. And every computer has a network interface card and we assign IP address to this card.  With the help of this command, it is used to give IP address and netmask to the network interface and enable or disable the network interface, so let us see how to do all this. What is enabling or disabling a network interface?  Allowing the data to be received over the network or sent over the network is called enabling interface, on the contrary, the process is called disabling. Syntax:  ifconfig  [options]  [interface] 1. How to view network interface card information ? Syntax: $ifconfig  -a With the help of -a (--all) option, ifconfig displays all network interfaces whether enabled or disabled. In the picture you can see that there are three network interfaces eth0,lo and wlan0.  Above red line in wlan0 is written UP in flags=4163<UP, BROAD...
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