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by using "clrscr" command at starting of the program
It depends. If you are using a Windows Command Prompt, the command is "cls". If you are using a Mac or Unix distribution, the command is usually "clear". Other than that, I would restate the question, specifying the OS and hardware you are using.
KAIMAN
It's more appropriate to answer what files can be executed from the command line.You can execute .exe, .com and .bat files and you can open files using their associated program by typing their name.
All files in a directly can be copied without copying the sub directories using FTP by first highlighting them. This allows a user to specifically select only the files they want to transfer. If you are doing this via the command line interface using the mget command with a mask (such as *) will transfer all files except subdirectories.
Using man ls will open the manual page for the ls command. The ls command lists the files and folders in the current directory.
clear banner motd ^^^ I believe that command is wrong. It should be "no banner motd", if your using the cisco command line.
Dos commands are used to create or delete directories. The ATTRIB Command is used for locking and unlocking of files.
You turn of the Functions axes so you a completely clear graph screen. Then, you use the pt-change command to create your image. You can then use the StorePic command to store your image to Pic variable, which can be sent to a computer or recalled using the RecallPic command.
The Linux operating system command gunzip does many things. The main thing that gunzip does it compress files so that they are smaller and easier to upload and download.
Unix files do not rely on extensions, therefore there is no command to find them.
Go to the command prompt and type COMP and press return. You will be asked in turn for the files you want to compare.