What does xargs do in bash?
Xargs is a great command that reads streams of data from standard input, then generates and executes command lines; meaning it can take output of a command and passes it as argument of another command. If no command is specified, xargs executes echo by default.
Which are the standard input?
Typically this is the keyboard, but you can specify that input is to come from a serial port or a disk file, for example. The standard output device, also referred to as stdout , is the device to which output from the system is sent. Typically this is a display, but you can redirect output to a serial port or a file.
What is the purpose of the xargs command?
What is the xargs Command? The xargs command builds and executes commands provided through the standard input. It takes the input and converts it into a command argument for another command. This feature is particularly useful in file management, where xargs is used in combination with rm, cp, mkdir, and other similar commands.
Is it possible for xargs to be used securely?
It is not possible for xargs to be used securely, since there will always be a time gap between the production of the list of input files and their use in the commands that xargs issues.
When do you need to use xargs in grep?
To answer your question, xargs can be used when you need to take the output from one command and use it as an argument to another. In your first example, grep takes the data from standard input, rather than as an argument. So, xargs is not needed. xargs takes data from standard input and executes a command.
How do I get the prompt in xargs?
You can use the -p option of xargs to get the prompt. By default, the xargs command adds the standard input as argument at the end of the command. This creates a problem when you need to use that before the last argument. For example, if you use the move command, you need the source first and then the target.