How do I view detailed boot log of my Ubuntu system?
The dmesg command print or control the kernel ring buffer. You can also use files located in /var/log/ directory to see snapshot of boot messages. To see logs type the following command at shell prompt (open the terminal and type the commands):
$ dmesg | less
You can use the following two files as well:
- /var/log/boot.log
- /var/log/dmesg
To see them type:
less /var/log/boot.log less /var/log/dmesg grep error /var/log/dmesg grep something /var/log/boot.log
🐧 Get the latest tutorials on Linux, Open Source & DevOps via RSS feed or Weekly email newsletter.
🐧 2 comments so far... add one ↓
🐧 2 comments so far... add one ↓
Related Tutorials
Ubuntu Linux check cron log file error or messages…
Linux LILO boot procedure freezes with LI characters…
OpenBSD set up default boot time by modifying boot.conf file
Ubuntu Create a cron.log File To Log crontab Logs…
View log files in Ubuntu Linux
Linux Syslogd: Nothing Gets Logged Using /dev/log…
Apache Log POST Data To A Log File
| Category | List of Unix and Linux commands |
|---|---|
| Disk space analyzers | ncdu • pydf |
| File Management | cat |
| Firewall | Alpine Awall • CentOS 8 • OpenSUSE • RHEL 8 • Ubuntu 16.04 • Ubuntu 18.04 • Ubuntu 20.04 |
| Network Utilities | NetHogs • dig • host • ip • nmap |
| OpenVPN | CentOS 7 • CentOS 8 • Debian 10 • Debian 8/9 • Ubuntu 18.04 • Ubuntu 20.04 |
| Package Manager | apk • apt |
| Processes Management | bg • chroot • cron • disown • fg • jobs • killall • kill • pidof • pstree • pwdx • time |
| Searching | grep • whereis • which |
| User Information | groups • id • lastcomm • last • lid/libuser-lid • logname • members • users • whoami • who • w |
| WireGuard VPN | Alpine • CentOS 8 • Debian 10 • Firewall • Ubuntu 20.04 |
On a Ubuntu/Debian, Bootlog is turned of by default. Turn it on like this:
vi /etc/default/bootlogd
# Run bootlogd at startup ?
BOOTLOGD_ENABLE=Yes
hello, how to get boot log on boot remotly , i have a linux server in my office and i remote retart it but some times apache or mysql crach on boot time and i cant knew why i must go to my office and connect monitor to see the error,
is there any way to see live boot message ?
thank you