1 00:00:01,160 --> 00:00:08,660 ‫So the health command is a command line utility for outputting the first part of the files given to 2 00:00:08,660 --> 00:00:10,400 ‫it via standard input. 3 00:00:11,410 --> 00:00:19,860 ‫Right, so it it writes the results to standard input, but by default, head returns the first 10 lines 4 00:00:19,860 --> 00:00:21,750 ‫of each file that it is given. 5 00:00:23,450 --> 00:00:28,220 ‫You can add a number with the dash and parameter to see the first specified lines if you want. 6 00:00:29,030 --> 00:00:30,140 ‫You want to see how that works. 7 00:00:30,590 --> 00:00:31,640 ‫I want to show it to you. 8 00:00:33,050 --> 00:00:39,290 ‫So changed directory to these last users slash, share slash and map slash script. 9 00:00:40,820 --> 00:00:41,690 ‫List files. 10 00:00:43,010 --> 00:00:46,370 ‫And as you can see, there are lots of maps, script files. 11 00:00:47,470 --> 00:00:50,080 ‫So let's run one of them with the head command. 12 00:00:57,970 --> 00:01:04,240 ‫And it displays 10 lines by default, so let's specify a number with the dash and parameter. 13 00:01:08,010 --> 00:01:12,060 ‫OK, so this time we see the first 20 lines of this fire.