Disable CentOS 6 Boot Splash Screen

デフォルトではCentOS起動時にスプラッシュスクリーンが表示されてブートプロセスが隠れています。
インストール後はやはり一度エラーが発生していないか確認しておきたいですね

このブートプロセスを表示させる方法です

• [ATL]+[d]

ブートが始まった時に[ATL]と[d]キーを同時に押せばブートプロセスが表示されます。取り敢えずこれが一番簡単です

• GRUBの設定(1)

これも一時的なものです

1. ブートでGRUBが表示されたら[ESC]キーを押します
2. 編集のために[e]キーを押します
3. kernel行から”rhgb”と”quiet”を削除します
4. [Enter]キーの後[b]キーを押してブートを継続します
• GRUBの設定(2)

常にブート時にプロセスが表示させるようにGRUB設定ファイルを編集します
kernel行から”rhgb”と”quiet”を削除します

【変更前】

Shell

[root@host1 ~]# cat /etc/grub.conf # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/sda2 # initrd /initrd-[generic-]version.img #boot=/dev/sda default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.32-358.2.1.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-358.2.1.el6.x86_64 ro root=UUID=xxxxxx-xxxx-xxx-xxx-xxxxxxxxxxx rd_NO_LUKS rd_NO_MD KEYBOARDTYPE=pc KEYTABLE=jp106 LANG=ja_JP.UTF-8 rd_NO_LVM rd_NO_DM rhgb quiet crashkernel=auto initrd /initramfs-2.6.32-358.2.1.el6.x86_64.img

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

[root@host1 ~]# cat /etc/grub.conf # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE:  You have a /boot partition.  This means that #          all kernel and initrd paths are relative to /boot/, eg. #          root (hd0,0) #          kernel /vmlinuz-version ro root=/dev/sda2 #          initrd /initrd-[generic-]version.img #boot=/dev/sda default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.32-358.2.1.el6.x86_64)         root (hd0,0)         kernel /vmlinuz-2.6.32-358.2.1.el6.x86_64 ro root=UUID=xxxxxx-xxxx-xxx-xxx-xxxxxxxxxxx rd_NO_LUKS rd_NO_MD  KEYBOARDTYPE=pc KEYTABLE=jp106 LANG=ja_JP.UTF-8 rd_NO_LVM rd_NO_DM rhgb quiet crashkernel=auto         initrd /initramfs-2.6.32-358.2.1.el6.x86_64.img

【変更後】

Shell

[root@host1 ~]# cat /etc/grub.conf # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/sda2 # initrd /initrd-[generic-]version.img #boot=/dev/sda default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.32-358.2.1.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-358.2.1.el6.x86_64 ro root=UUID=xxxxxx-xxxx-xxx-xxx-xxxxxxxxxxx rd_NO_LUKS rd_NO_MD KEYBOARDTYPE=pc KEYTABLE=jp106 LANG=ja_JP.UTF-8 rd_NO_LVM rd_NO_DM crashkernel=auto initrd /initramfs-2.6.32-358.2.1.el6.x86_64.img

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

[root@host1 ~]# cat /etc/grub.conf # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE:  You have a /boot partition.  This means that #          all kernel and initrd paths are relative to /boot/, eg. #          root (hd0,0) #          kernel /vmlinuz-version ro root=/dev/sda2 #          initrd /initrd-[generic-]version.img #boot=/dev/sda default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.32-358.2.1.el6.x86_64)         root (hd0,0)         kernel /vmlinuz-2.6.32-358.2.1.el6.x86_64 ro root=UUID=xxxxxx-xxxx-xxx-xxx-xxxxxxxxxxx rd_NO_LUKS rd_NO_MD  KEYBOARDTYPE=pc KEYTABLE=jp106 LANG=ja_JP.UTF-8 rd_NO_LVM rd_NO_DM crashkernel=auto         initrd /initramfs-2.6.32-358.2.1.el6.x86_64.img

参考サイト
Making the CentOS 6 Boot Splash Screen More Verbose
http://blog.nexcess.net/2011/08/22/making-the-centos-6-boot-splash-screen-more-verbose/

RHEL 6: View boot messages “behind” the splash screen
http://serverfault.com/questions/316163/rhel-6-view-boot-messages-behind-the-splash-screen