Let's look at the
cat command (short for concatenation), which is used for manipulating text files.
There are a number of things cat can do including:
To display the contents of a file, simply place a filename or the path to a file as an argument.
$ cat fileName
file contents will output here.
cat is also used to create a text file. The following command will allow you to type directly into the terminal to the helloWorld.txt file.
$ cat > helloWorld.txt
type in text here.
To quit, press ctrl+d.
To place two or more text files together, simply use the following command:
$ cat file1.txt file2.txt > newFile.txt
To append instead of overwriting, use
>>. Appending will simply add to the end of a file instead of starting a new one.
$ cat >> helloWorld.txt # now type some text here and it will get appended to existing text.
ctrl+d to when done.
cat command has a few options which you may find useful.
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