linux Console_Redirection -RHEL 7.x

linux Console_Redirection -RHEL 7.0





7.5 above

1.Configuring GRUB 2
#vim /etc/default/grub
GRUB_TERMINAL="serial"
GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"
GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,115200n8"

2.Add console=ttyS0,115200n8 to kermel
legacy mode
#vim /etc/grub2.cfg
linux16      /vmlinuz-3.10.0-0.rc4.59.el7.x86_64 root=/dev/mapper/rhel-root ro rd.md=0 rd.dm=0 rd.lvm.lv=rhel/swap crashkernel=auto rd.luks=0 vconsole.keymap=us rd.lvm.lv=rhel/root rhgb quiet
console=tty0 console=ttyS0,115200n8

UEFI mode
#vim /etc/grub2-efi.cfg
linux16      /vmlinuz-3.10.0-0.rc4.59.el7.x86_64 root=/dev/mapper/rhel-root ro rd.md=0 rd.dm=0 rd.lvm.lv=rhel/swap crashkernel=auto rd.luks=0 vconsole.keymap=us rd.lvm.lv=rhel/root rhgb quiet
console=tty0 console=ttyS0,115200n8

3.If BIOS is legacy mode
#grub2-mkconfig -o /boot/grub2/grub.cfg
If BIOS is UEFI mode
#grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg
4.Reboot



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7.0
1.Configuring GRUB 2
#vim /etc/default/grub
GRUB_TERMINAL="serial"
GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"
GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,115200n8"

2.Add console=ttyS0,115200n8 to kermel
#vim /etc/grub2.cfg
linux16      /vmlinuz-3.10.0-0.rc4.59.el7.x86_64 root=/dev/mapper/rhel-root ro rd.md=0 rd.dm=0 rd.lvm.lv=rhel/swap crashkernel=auto rd.luks=0 vconsole.keymap=us rd.lvm.lv=rhel/root rhgb quiet
console=tty0 console=ttyS0,115200n8

3.If BIOS is legacy mode
#grub2-mkconfig -o /boot/grub2/grub.cfg
If BIOS is UEFI mode
#grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg
4.Reboot