Linux cat command

Translation results：

cat

英[kæt] 美[kæt]

n.Cat; feline; vicious woman; jazz lover

vt. Hang (anchor) on the anchor frame; seeking pleasure, staying with prostitutes

Third person singular: cats Plural: cats Present participle: catting Past tense: catted Past participle: catted

Linux cat commandsyntax

Function:The cat command is used to connect files and print to the standard output device.

Permissions: All users

Syntax: cat [-AbeEnstTuv] [--help] [--version] fileName

Add the line number to the document content of textfile1 and enter it into the textfile2 document:

cat -n textfile1 > textfile2

Add the line number to the document content of textfile1 and textfile2 (blank lines are not added) and append the content to the textfile3 document:

cat -b textfile1 textfile2 >> textfile3

Clear /etc/test.txt Document content:

cat /dev/null > /etc/test.txt

cat can also be used to make image files. For example, if you want to make an image file of a floppy disk, put the floppy disk away and enter:

cat /dev/fd0 > OUTFILE

On the contrary, if you want to write the image file to the floppy disk, enter:

cat IMG_FILE > /dev/fd0