Cat command merges files with Linux redirection

Take a look at the documentation:

<span style= "FONT-SIZE:18PX;" >[[email protected] documents]$ <strong>cat--help</strong> usage: cat [options] ... [File] ... Output the [file] or standard input combination to the standard output.  -A,--show-all           equals-vet-  B,--number-nonblank    to non-null output line number-  e                       equals-ve-  E,--show-ends          Show "$"-N at the end of each line  ,--number             to all lines of output-  s,--squeeze-blank      does not output multiple lines of empty lines-  t                       with-vt equivalent  -T,-- Show-tabs          the tab character as ^i-  u                       (ignored)-  V,--show-nonprinting   uses ^ and M-references, except LFD and TAB      Help displays this helpful information and exits      --version displays version information and exits if no file is specified, or if the file is "-", it is read from the standard input. Example:  cat f-g outputs the contents of  F First, then outputs the contents of the standard input, and finally outputs the contents of G.  Cat        Copies the contents of the standard input to the standard output. </span>

combine several files with commands

<span style= "FONT-SIZE:18PX;" ><strong>cat a.txt b.txt > c.txt</strong></span>

or

<span style= "FONT-SIZE:18PX;" ><strong>cat a.txt b.txt >> c.txt</strong></span>

The difference is the first to create a file or truncate a file. The second one is appended to the end of the file (the file does not exist created).

Cat command merges files with Linux redirection