1 00:00:00,870 --> 00:00:06,100 Now, in when we are implementing any server then reading log file is very important. 2 00:00:06,390 --> 00:00:12,440 So in the case of apache also, two main log files are maintain. 3 00:00:12,450 --> 00:00:15,900 One is /var/log/httpd/access_log. 4 00:00:16,050 --> 00:00:17,760 And second is your error_log. 5 00:00:18,270 --> 00:00:23,590 now, Apache web server keeps log files and error file in which directory /var/log/httpd directory. 6 00:00:23,880 --> 00:00:31,860 You can view the access_log by viewing /var/log/httpd/access_log file and error_log by viewing your 7 00:00:32,130 --> 00:00:34,800 /var/log/httpd/error_log file. 8 00:00:35,010 --> 00:00:42,540 These files are going to give you very useful information which can be very useful for troubleshooting 9 00:00:42,540 --> 00:00:49,860 purposes and log files are maintained in your common log format, which is standard text log format. 10 00:00:51,750 --> 00:00:59,200 If the log files are in this format, you can use many external tools for analyzing the log files. 11 00:00:59,700 --> 00:01:07,860 So when we view this log file, we are just viewing the last one line tail -1 mean just 12 00:01:07,860 --> 00:01:10,280 displayed the last one line access_log. 13 00:01:10,560 --> 00:01:18,390 It will give you the information from where we assess the server, on which date we access what was 14 00:01:18,390 --> 00:01:19,140 the request. 15 00:01:19,650 --> 00:01:23,220 And in error_log, it is going to give you the error. 16 00:01:23,640 --> 00:01:30,140 Like in our case, when we did not change the home directory permission denied access was there. 17 00:01:30,510 --> 00:01:38,010 So log files will give you very useful information what is happening who try to access at which 18 00:01:38,010 --> 00:01:38,330 time. 19 00:01:38,580 --> 00:01:39,590 So very useful. 20 00:01:39,900 --> 00:01:47,100 So let us go to the master and let us check which log files are there. 21 00:01:47,670 --> 00:01:54,380 So we will logging in as the root user because only root users can view these log files. 22 00:01:55,140 --> 00:02:00,300 So first we will view tail -1 23 00:02:01,710 --> 00:02:07,410 /var/log/httpd/access_log. 24 00:02:09,160 --> 00:02:18,430 So it is showing you that nanu user was able to access by using the name and that specifying by using 25 00:02:18,430 --> 00:02:28,930 that name, if we are going to use if we are going to say display two lines, then it is showing the 26 00:02:29,380 --> 00:02:32,750 access by your IP address also. 27 00:02:32,920 --> 00:02:39,080 Let us show you the whole last 10 lines, then let us see what is happening. 28 00:02:40,570 --> 00:02:43,630 So it is giving you a lot of information. 29 00:02:43,630 --> 00:02:48,790 That means when we accessed by the IP address, it is showing that also and when we accessed by the 30 00:02:48,790 --> 00:02:50,410 name, it is showing that also. 31 00:02:51,130 --> 00:02:52,850 And what about the error log file? 32 00:02:53,980 --> 00:03:03,290 You can view with this tail command, it is again showing you last ten lines, so it showing you permission 33 00:03:03,290 --> 00:03:05,720 deny errors. 34 00:03:06,010 --> 00:03:13,810 So a lot of information you can find in by viewing this as access_log and as as a error_log file, in error log 35 00:03:13,810 --> 00:03:21,620 file error, permission deny type message is there, in the case of access 36 00:03:22,690 --> 00:03:27,570 it will note down who had successfully able to access our webserver. 37 00:03:27,760 --> 00:03:29,970 So that information is also very important. 38 00:03:30,400 --> 00:03:38,140 And if we are going to view it, we can view last one line also so we can specify -1. 39 00:03:39,250 --> 00:03:42,690 So it is showing you this permission deny error. 40 00:03:43,090 --> 00:03:50,150 So that was our how we have implemented our per user web directory concept. 41 00:03:50,170 --> 00:03:52,290 This is very important concept. 42 00:03:52,690 --> 00:04:02,620 So that was our structure that mean we can access the web pages of the user by using this command or 43 00:04:02,620 --> 00:04:03,700 by using this command. 44 00:04:03,970 --> 00:04:09,540 And every user can launch their own website by using their home directory. 45 00:04:09,610 --> 00:04:14,170 So that was the whole purpose of this set of videos.