upgrade Ubuntu 16.04.03 to kernel 4.10

https://askubuntu.com/questions/944842/kernel-4-10-in-ubuntu-16-04-3-update

sudo update
sudo upgrade

sudo apt install linux-generic-hwe-16.04

Setup Centos syslog server and Ubuntu syslog client

On CentOS syslog server: (172.16.0.1)
edit /etc/rsyslogd.conf
uncomment
$ModLoad imtcp
$InputTCPServerRun 514

add a line after "*.emerg"

*.emerg                /var/log/emerg.conf

Add firewall rule of TCP port 514

# firewall-cmd --permanent --zone=public --add-port=514/tcp

# firewall-cmd --reload

On Ubuntu syslog client

edit /etc/rsyslog.d/50-default.conf

add a line after "*.emerg"

*.emerg           @@172.16.0.1

Try on client:

# logger -p user.emerg "emerg from XXXX"

Check the syslog server is recieved.

# cat /var/log/emerg.log

vga=0x319

# vim /etc/defualt/grub
add GRUB_CMDLINE_LINUX="nomodeset vga=0x319"

# grub-mkconfig -o /boot/grub/grub.cfg

CentOS7 firewall add port

https://stackoverflow.com/questions/24729024/centos-7-open-firewall-port

firewall-cmd --get-active-zones

firewall-cmd --zone=public --add-port=2888/tcp --permanent

firewall-cmd --reload

install kernel 4.10 on RHEL 7

http://linux.vbird.org/linux_basic/0540kernel.php
http://elrepo.org/tiki/tiki-index.php
http://elrepo.org/tiki/kernel-ml


rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org (external link)
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

yum --enablerepo=elrepo-kernel install kernel-ml

UEFI多重開機

http://www.rodsbooks.com/refind/

UEFI不支持MBR開機 (只能用GPT)

GPT也不能再Legacy BIOS下開機了

GPT可支持2TB以上

UEFI firmware有boot manager
可在linux下用efibootmgr編輯
windows下用bcdedit編輯

windows下可用diskpart切換MBR & GPT
https://zh.wikipedia.org/wiki/%E4%B8%BB%E5%BC%95%E5%AF%BC%E8%AE%B0%E5%BD%95/

安裝時是UEFI mode就會被用GPT切割硬碟
安裝時是Legacy就是用MBR

UEFI mode安裝完Ubuntu或是RHEL，grub會安裝到 UEFI SYSTEM PARTITION的/boot/efi

Legacy mode安裝完Ubuntu或是RHEL，會安裝grub到MBR (會scan可開機partition在menu)

Edit EFI boot entries in Linux

The utility name is efibootmgr

https://wiki.gentoo.org/wiki/Efibootmgr