Boot Error Log Ubuntu
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communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers php error log ubuntu or posting ads with us Ask Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask php error log ubuntu nginx Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute: Sign up Here's how it mysql error log ubuntu works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Where to find ubuntu boot logs? up vote 1 down vote favorite My Xubuntu 14.04 installation stopped booting all of a apache2 error log ubuntu sudden: after rebooting I just see a flashing _ in the top left corner of the screen. Holding Left-Shift during boot won't open any menu, Ctrl+Alt+F* will not open a terminal I can type in. I've reset BIOS settings, which did not help, then made a bootable USB stick with Ubuntu. I can now boot and I see that the data on the disk with OS is intact, I've checked the disk with badblocks and it found no errors. Is there any
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way I can locate any details as to why the system does not boot? 14.04 boot logs share|improve this question edited Aug 8 '15 at 8:29 Prashant Chikhalkar 1,1841920 asked Aug 8 '15 at 6:45 Fluffy 6171727 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote accepted You can use two log files to view the boot problem. /var/log/boot.log --- System boot log /var/log/dmesg --- print or control the kernel ring buffer Just use dmesg in terminal to view event occurred since boot. share|improve this answer answered Aug 8 '15 at 6:55 Prashant Chikhalkar 1,1841920 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged 14.04 boot logs or ask your own question. asked 1 year ago viewed 1072 times active 1 year ago Blog International salaries at Stack Overflow Related 4Where to find log file for booting information4Where is the Xpad content stored on disk?1Where are all my computer actions logged on 14.04 LTS?0Export chrooted logs from a pbuilder-dist build0Ubuntu 14.04.3 has frozen. What logs to check after reboot?0nagios logs were not getting updated0Ubuntu 14.04 won't boot reverts to blinking cursor0
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Us Learn more about Stack Overflow the company Business Learn more about hiring ubuntu 16.04 boot log developers or posting ads with us Ask Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask Ubuntu is a linux view boot log question and answer site for Ubuntu users and developers. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are http://askubuntu.com/questions/657969/where-to-find-ubuntu-boot-logs voted up and rise to the top No more boot logging since 16.04? up vote 11 down vote favorite 6 I noticed that my /var/log/boot.log file has date 2016-04-22, last time I booted in 15.10. Where are Xenial boot.log files located? boot 16.04 log logging share|improve this question asked Apr 27 at 9:06 jasmines 5,91295082 Is real question not logging, but seeing what is slowing boot. http://askubuntu.com/questions/763638/no-more-boot-logging-since-16-04 Now you use systemd-analyze blame and/or systemd-analyze critical-chain . I do find that easier than digging thru log files to find what is causing an issue. –oldfred Apr 29 at 16:39 so, none of you can say why boot.log is held on 2016-04-22... ? REALLY? –jasmines May 4 at 13:19 1 @jasmines : Unfortunately we can't tell you why this happens ... we are not the developers ... I updated my answer with some new information from today ... you should consider to file a bug report on Launchpad. :) –cl-netbox May 4 at 13:55 @jasmines Isn't it obvious? That's the date you last had 15.10. 16.04 no longer uses boot.log. Ergo, last date on which boot.log was update = last date you had 15.10. –muru May 5 at 10:23 @muru why do you say that 16.04 does not use boot.log? Mine is still updated at every boot (I am on 16.04, MBR, upgraded from 15.10) pastebin.ubuntu.com/16236745 –dadexix86 May 5 at 12:13 | show 7 more comments 3 Answers 3 active oldest votes up vote 11 down vote +100 Use journalctl Since journald contains all the logs, you can use the journalctl command with
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business http://superuser.com/questions/176165/where-linux-places-the-messages-of-boot Learn more about hiring developers or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes https://www.digitalocean.com/community/tutorials/how-to-view-and-configure-linux-logs-on-ubuntu-and-centos a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Where Linux places the messages of boot? up vote 25 down error log vote favorite 7 I want to find place to where Linux writes all boot messages. You know: facility one [STARTED] facility two [STARTED] facility three [FAILED] I searched with find . -print0 | xargs -0 grep -i "words from boot messages" in /var/log/, but found nothing. I have CentOS 5.5. For example at boot time I had: "Determining IP information for eth0... failed; no link present. Check cable?" I don't care about error specificaly, but I error log ubuntu can't find any log that holds this error. dmesg | grep "no link present" returns nothing too. linux boot centos logging share|improve this question edited Apr 26 '14 at 13:19 Jonas Stein 337418 asked Aug 15 '10 at 20:14 Rodnower 70921536 did you run the find command with root permissions? find will print all files you can list, but grep can only check the files you can read & some log files might be owned by root withput read permissions for other users. Also, at least GNU grep supports th -l option to print the names of files with matches instead of matched lines. This can be very usefule looking for files that contain certain text. So try su -c 'find /var/log -print0 | xargs -0 grep -l -i "words from boot messages"' or sudo find /varlog -print0 | xargs -0 sudo grep -l -i "words from boot messages" –mschilli Feb 15 '15 at 8:33 add a comment| 4 Answers 4 active oldest votes up vote 16 down vote Most of the boot messages are put in a buffer, that you can access using the command dmesg. On most Linux distributions, that output is also stored in /var/log/dmesg.log That you can view with tail -n 100 /var/log/dmesg.log share|improve this answer edited Jul 16 '15 at 0:48 rubo77 87131642 answered Aug 15 '10 at 20:21 Luc Stepn
In submit Tutorials Questions Projects Meetups Main Site logo-horizontal DigitalOcean Community Menu Tutorials Questions Projects Meetups Main Site Sign Up Log In submit View All Results By: Sadequl Hussain Subscribe Subscribed Share Contents Contents We hope you find this tutorial helpful. In addition to guides like this one, we provide simple cloud infrastructure for developers. Learn more → 9 How To View and Configure Linux Logs on Ubuntu and Centos Posted Dec 17, 2013 162.3k views Logging Linux Basics CentOS Ubuntu Debian Introduction Linux system administrators often need to look at log files for troubleshooting purposes. In fact, this is the first thing any sysadmin would do. Linux and the applications that run on it can generate all different types of messages, which are recorded in various log files. Linux uses a set of configuration files, directories, programs, commands and daemons to create, store and recycle these log messages. Knowing where the system keeps its log files and how to make use of related commands can therefore help save valuable time during troubleshooting. In this tutorial, we will have a look at different parts of the Linux logging mechanism. Disclaimer The commands in this tutorial were tested in plain vanilla installations of CentOS 6.4, Ubuntu 12 and Debian 7. Default Log File Location The default location for log files in Linux is /var/log. You can view the list of log files in this directory with a simple ls -l /var/log command. This is what I see in my CentOS system: [root@TestLinux ~]# ls -l /var/log total 1472 -rw-------. 1 root root 4524 Nov 15 16:04 anaconda.ifcfg.log -rw-------. 1 root root 59041 Nov 15 16:04 anaconda.log -rw-------. 1 root root 42763 Nov 15 16:04 anaconda.program.log -rw-------. 1 root root 299910 Nov 15 16:04 anaconda.storage.log -rw-------. 1 root root 40669 Nov 15 16:04 anaconda.syslog -rw-------. 1 root root 57061 Nov 15 16:04 anaconda.xlog -rw-------. 1 root root 1829 Nov 15 16:04 anaconda.yum.log drwxr-x---. 2 root root 4096 Nov 15 16:11 audit -rw-r--r-- 1 root root 2252 Dec 9 10:27 boot.log -rw------- 1 root utmp 384 Dec 9 10:31 btmp -rw-------. 1 root utmp 1920 Nov 28 09:28 btmp-20131202 drwxr-xr-x 2 root root 4096 Nov 29 15:47 ConsoleKit -rw------- 1 root root 2288 Dec 9 11:01 cron -rw-------. 1 root root 8809 Dec 2 17:09 cron-20131202 -rw-r--r-- 1 root root 21510 Dec 9 10:27 dmesg -rw-r--r-- 1 root root 21351 Dec 6 16:37 dmesg.old -rw-r--r--. 1 root root 165665 Nov 15 16:04 dracut.log -rw-r--r--. 1 root root 146876 Dec 9 10:44 lastlog -rw------- 1