Shell Data Processing - Standard Input Stream (Stdin)

Card Puncher Data Processing


IO - Standard Input (stdin) in a shell



Cat From a file

cat will start a standard input session


You can redirect it to a file.

cat > myinput.txt

Echo from literal

If your command needs plain input without terminal emulation you can use input redirection with a pipe like:

echo "some input" | command


Ctrl+D typed at the start of a line on a terminal, signifies the end of the file (input).


cat -

Type what you want then Ctrl+D

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Bash Liste Des Attaques Ovh
Bash - Standard input (stdin)

operations that applied only to the bash|bash shell See The input redirection operator takes the content of a file and send it as standard input Example with read that take a stand Create...
Git - Blob

blob in git is a object of the blob type that corresponds / represents the file contents (or inodes) in the git file system. file This command will put a blob in the object database where: the...
Git - Objects (Database)

An object is the value in the entry of the git database key-value. All entities in git are objects. Objects are the entity of the Git file system. On the operating file system, the objects are stored...
Card Puncher Data Processing
Shell - (Word|Token)

In a bash pipeline, the pipeline message is known as: the word the field This is a sequence of characters considered as a single unit by the shell. The first message is the standard input....
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Shell Data Processing - (WC|Word Count) command (Line count)

The wc command is a filter that prints on one line sequentially the number of: newlines (lines), words, and characters from: files or from an input stream when: no FILE is specified or...
Card Puncher Data Processing
Shell Data Processing - Cat command (short for concatenate)

cat generates a stream of data from one or more files It therefore concatenate files. Output file1.txt then file2.txt contents and redirect and create the file fileAll.txt Content of fileAll.txt...
Card Puncher Data Processing
Shell Data Processing - Command

command in a shell may have one of the following functions in a pipeline. a start command to create a input stream from a file from an terminal input or text a filter command to process a input...
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Shell Data Processing - Echo

Echo is a command that accepts an argument as standard input, and echoes it back to the terminal as standard output.
Card Puncher Data Processing
Shell Data Processing - Filter (Stream Operator)

This page is pipeline operator in a shell language. They are known as filter in a shell language. It is a computer program or shell command (subroutine) that: read from standard input (stream)...
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Shell Data Processing - Pipe ( command to command redirection)

The pipe is a redirection operator held to transmit the stream output (stdout or sterr) of a command to another as stream input. One or more pipe operators followed by command forms a pipeline. Control...

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