Shell script to count number of lines in a file without using wc command

Here we see two user shell scripts, and, each sourceing the common library file common.lib, and using variables and functions declared in that file. This is nothing too earth-shattering, just an example of how code reuse can be done in shell programming.

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You can run the shell script by simply typing filename as if it were a regular command. The shell script file can contain any commands which can be typed in, as well as the control structures described above. Shell script arguments When you write a shell script, a special array variable argv is created with the arguments entered.

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the following command either at the Linux command prompt or within a Windows Command Prompt window: vivado -mode batch -source <your_Tcl_script> The Vivado Design Suite Tcl shell will open, run the specified Tcl script, and exit when the script completes. In batch mode, you can queue up a series of Tcl scripts to process a number of Shells and Shell Scripts. A Unix shell is a command language interpreter, the primary purpose of which is to The simplest way to execute a shell script is to used chmod to make the text file executable. Any commands enclosed within parentheses are run in a separate shell, similar to the...You can count the number of lines in the file by redirecting the standard input of the wc command from the file users − $ wc -l < users 2 $ Note that there is a difference in the output produced by the two forms of the wc command. In the first case, the name of the file users is listed with the line count; in the second case, it is not.

You could use ls -1 *.mp4 | wc -l. This will list all files ending on.mp4, printing each file on a new line (ls -1 *.mp4), pipe the output to wc which will count the number of new lines using the -l flag.

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