Cat Command Summary

Cat: Stitching files or printing to standard output. Common parameters:-N or default.

[[Email protected] ~]# man catcat (1)                              user commands                           cat (1) name        cat - concatenate files and print on the standard  Outputsynopsis       cat [option]... [file] ... Description       concatenate file (s), or standard  input, to standard output.       -a, --show-all               equivalent to -vet        -b, --number-nonblank              number  nonempty output lines       -e      equivalent to -vE       -E, --show-ends               display $ at end  of each line       -n, --number               number all output lines        -s, --squeeze-blank               suppress repeated empty output lines        -t     equivalent to -vT        -t, --show-tabs              display tab  characters as ^i       -u      (ignored)        -v, --show-nonprinting               use ^ and M- notation, except  for lfd and tab       --help display this  help and exit       --version               output version information and exit        With no FILE, or when FILE is -,  Read standard input. Examples       cat f - g     &nBsp;        output  f ' s contents, then  Standard input, then g ' s con-               tents.       cat    Copy  Standard input to standard output.

1. Default parameter: Print the file to standard output.

[email protected] ~]# cat test.txt testliyaooldboytestjustoldboytest[[email protected] ~]#

2,-n parameter: Print the file to standard output and print the line number of each line.

[[email protected] ~]# cat-n test.txt 1 Test 2 Liyao 3 Oldboy 4 Test 5 just 6 7 Oldboy 8 Test[[email protected] ~]#

3, the use of redirection symbols, input content to the file.

[[email protected] ~]# cat >> test.txt <<EOF> Just for a test> eof[[email protected] ~]# cat-n test.txt 1 Test 2 Liyao 3 Oldboy 4 Test 5 just 6 7 Oldboy 8 Test 9 just for a test[[e Mail protected] ~]#

4,-e parameter: Displays the Terminator, ending with $.

[Email protected] ~]# cat-e test.txt test$liyao$oldboy$test$just$ $oldboy $test$just for a test$

5, stitching the contents of the file, the output of two files to the standard output.

[[email protected] ~]# cat Test.txt testliyaooldboytestjustoldboytestjust for a test[[email protected] ~]# cat just_test.t XT Hello World[[email protected] ~]# cat just_test.txt test.txt Hello worldtestliyaooldboytestjustoldboytestjust for a tes T[[email protected] ~]#

This article is from the "Yau Xin Zhai" blog, please be sure to keep this source http://mofei.blog.51cto.com/6840705/1761965

Cat Command Summary