--- trunk/grubby/grubby.8 2011/06/03 20:32:19 1332 +++ trunk/grubby/grubby.8 2017/06/27 14:32:57 3012 @@ -1,32 +1,49 @@ .TH GRUBBY 8 "Tue Jan 18 2005" + .SH NAME -grubby \- command line tool for configuring grub, lilo, and elilo + +grubby \- command line tool for configuring grub, lilo, elilo, yaboot and zipl .SH SYNOPSIS -\fBgrubby\fR [--add-kernel=\fIkernel-path\fR] [--args=\fIargs\fR] - [--bad-image-okay] [--boot-filesystem=\fIbootfs\fR] - [--bootloader-probe] [--config-file \fIpath\fR] - [--copy-default] [--default-kernel] + +\fBgrubby\fR [--add-kernel=\fIkernel-path\fR] [--args=\fIargs\fR] + [--bad-image-okay] [--boot-filesystem=\fIbootfs\fR] + [--bootloader-probe] [--config-file \fIpath\fR] [--copy-default] + [--debug] [--default-kernel] [--default-index] [--default-title] + [--devtree=\fIdevicetree.dtb\fR] [--set-index=\fIentry-index\fR] [--grub] [--lilo] [--yaboot] [--silo] [--zipl] - [--info=\fIkernel-path\fR] [--initrd=\fIinitrd-path\fR] + [--info=\fIkernel-path\fR] [--initrd=\fIinitrd-path\fR] [--make-default] [-o path] [--version] [--remove-kernel=\fIkernel-path\fR] [--remove-args=\fIargs\fR] - [--set-default=\fIkernel-path\fR] [--title=entry-title] - [--add-multiboot=\fImultiboot-path\fR] [--mbargs=\fIargs\fR] - [--remove-multiboot=\fImultiboot-path\fR] [--remove-mbargs=\fIargs\fR] + [--set-default=\fIkernel-path\fR] [--set-default-index=\fIentry-index\fR] + [--title=entry-title] [--add-multiboot=\fImultiboot-path\fR] + [--mbargs=\fIargs\fR] [--remove-multiboot=\fImultiboot-path\fR] + [--remove-mbargs=\fIargs\fR] .SH DESCRIPTION + +.SS General Information + \fBgrubby\fR is a command line tool for updating and displaying information -about the configuration files for the \fBgrub\fR, \fBlilo\fR, \fBelilo\fR +about the configuration files for the \fBgrub\fR, \fBlilo\fR, \fBelilo\fR (ia64), \fByaboot\fR (powerpc) and \fBzipl\fR (s390) boot loaders. It is primarily designed to be used from scripts which install new kernels and need to find information about the current boot environment. -On Intel x86 platforms, \fBgrub\fR is the default bootloader and the -configuration file is in \fB/boot/grub/grub.conf\fR. On Intel ia64 platforms, -\fBelilo\fR mode is used and the default location for the configuration file -is \fB/boot/grub/grub.conf\fR. On PowerPC platforms, \fByaboot\fR parsing -is used and the configuration file should be in \fB/etc/yaboot.conf\fR. +.SS Architecture Support + +On BIOS-based Intel x86 platforms, \fBgrub2\fR is the default bootloader and +the configuration file is in \fB/boot/grub2/grub.cfg\fR. On UEFI-based Intel +x86 platforms, \fBgrub2\fR is the default bootloader, and the configuration +file is in \fB/boot/efi/EFI/redhat/grub.cfg\fR. On Intel ia64 platforms, +\fBelilo\fR mode is used and the default location for the configuration file +is \fB/boot/efi/EFI/redhat/elilo.conf\fR. On PowerPC platforms, systems based +on Power8 now support \fBgrub2\fR as a bootloader and store using a default +config stored in \fB/boot/grub2/grub.cfg\fR. The earlier Power7 systems use \fByaboot\fR +parsing and the configuration file should be in \fB/etc/yaboot.conf\fR. On +s390 platforms the \fBzipl bootloader\fR will read from \fB/etc/zipl.conf\fR. + +.SS Special Arguments There are a number of ways to specify the kernel used for \fB-\-info\fR, \fB-\-remove-kernel\fR, and \fB-\-update-kernel\fR. Specificying \fBDEFAULT\fR @@ -37,11 +54,26 @@ with that title are used. .SH OPTIONS + +.SS Basic Options + .TP \fB-\-add-kernel\fR=\fIkernel-path\fR Add a new boot entry for the kernel located at \fIkernel-path\fR. .TP +\fB-\-remove-kernel\fR=\fIkernel-path\fR +Removes all boot entries which match \fIkernel-path\fR. This may be used +along with -\-add-kernel, in which case the new kernel being added will +never be removed. + +.TP +\fB-\-update-kernel\fR=\fIkernel-path\fR +The entries for kernels matching \fRkernel-path\fR are updated. Currently +the only items that can be updated is the kernel argument list, which is +modified via the \fB-\-args\fR and \fB-\-remove-args\fR options. + +.TP \fB-\-args\fR=\fIkernel-args\fR When a new kernel is added, this specifies the command line arguments which should be passed to the kernel by default (note they are merged @@ -54,38 +86,11 @@ lilo.conf does). .TP -\fB-\-bad-image-okay\fR -When \fBgrubby\fR is looking for a entry to use for something (such -as a template or a default boot entry) it uses sanity checks, such as -ensuring that the kernel exists in the filesystem, to make sure -entries that obviously won't work aren't selected. This option overrides -that behavior, and is designed primarily for testing. - -.TP -\fB-\-boot-filesystem\fR=\fIbootfs\fR -The \fBgrub\fR boot loader expects file paths listed in it's configuration -path to be relative to the top of the filesystem they are on, rather then -relative to the current root filesystem. By default \fBgrubby\fR searches -the list of currently mounted filesystems to determine this. If this option -is given \fBgrubby\fR acts as if the specified filesystem was the filesystem -containing the kernel (this option is designed primarily for testing). - -.TP -\fB-\-bootloader-probe\fR -\fBgrubby\fR tries to determine if \fBgrub\fR or \fBlilo\fR is currently -installed. When one of those bootloaders is found the name of that bootloader -is displayed on stdout. Both could be installed (on different devices), and -grubby will print out the names of both bootloaders, one per line. The probe -for \fBgrub\fR requires a commented out boot directive \fBgrub.conf\fR -identical to the standard directive in the lilo configuration file. If this -is not present \fBgrubby\fR will assume grub is not installed (note -that \fBanaconda\fR places this directive in \fBgrub.conf\fR files it creates). -This option is only available on ia32 platforms. - - -.TP -\fB-\-config-file\fR=\fIpath\fR -Use \fIpath\fR as the configuration file rather then the default. +\fB-\-remove-args\fR=\fIkernel-args\fR +The arguments specified by \fIkernel-args\fR are removed from the +kernels specified by \fB-\-update-kernel\fR. The \fBroot\fR argument +gets special handling for configuration files that support separate root +filesystem configuration. .TP \fB-\-copy-default\fR @@ -94,70 +99,87 @@ and initrd path will never be copied. .TP -\fB-\-default-kernel\fR -Display the full path to the current default kernel and exit. +\fB-\-title\fR=\fIentry-title\fR +When a new kernel entry is added \fIentry-title\fR is used as the title +(\fBlilo\fR label) for the entry. If \fIentry-title\fR is longer then maximum +length allowed by the bootloader (15 for lilo, unlimited for grub and elilo) +the title is shortened to a (unique) entry. .TP -\fB-\-elilo\fR -Use an \fBelilo\fR style configuration file. +\fB-\-initrd\fR=\fIinitrd-path\fR +Use \fIinitrd-path\fR as the path to an initial ram disk for a new kernel +being added. .TP -\fB-\-grub\fR -Use a \fBgrub\fR style configuration file instead of \fBlilo\fR style. This -is the default on ia32 platforms. +\fB-\-set-default\fR=\fIkernel-path\fR +The first entry which boots the specified kernel is made the default +boot entry. .TP -\fB-\-info\fR=\fIkernel-path\fR -Display information on all boot entries which match \fIkernel-path\fR. I +\fB-\-set-default-index\fR=\fIentry-index\fR +Makes the given entry number the default boot entry. .TP -\fB-\-initrd\fR=\fIinitrd-path\fR -Use \fIinitrd-path\fR as the path to an initial ram disk for a new kernel -being added. +\fB-\-make-default\fR +Make the new kernel entry being added the default entry. .TP -\fB-\-lilo\fR -Use a \fBlilo\fR style configuration file. +\fB-\-set-index\fR=\fIentry-index\fR +Set the position at which to add a new entry created with \fB-\-add-kernel\fR. .TP -\fB-\-make-default\fR -Make the new kernel entry being added the default entry. +\fB-\-debug\fR +Display extra debugging information for failures. + +.SS Display Options .TP -\fB-\-remove-args\fR=\fIkernel-args\fR -The arguments specified by \fIkernel-args\fR are removed from the -kernels specified by \fB-\-update-kernel\fR. The \fBroot\fR argument -gets special handling for configuration files that support separate root -filesystem configuration. +\fB-\-default-kernel\fR +Display the full path to the current default kernel and exit. .TP -\fB-\-remove-kernel\fR=\fIkernel-path\fR -Removes all boot entries which match \fIkernel-path\fR. This may be used -along with -\-add-kernel, in which case the new kernel being added will -never be removed. +\fB-\-default-index\fR +Display the numeric index of the current default boot entry and exit. .TP -\fB-\-set-default\fR=\fIkernel-path\fR -The first entry which boots the specified kernel is made the default -boot entry. +\fB-\-default-title\fR +Display the title of the current default boot entry and exit. .TP -\fB-\-title\fR=\fIentry-title\fR -When a new kernel entry is added \fIentry-title\fR is used as the title -(\fBlilo\fR label) for the entry. If \fIentry-title\fR is longer then maximum -length allowed by the bootloader (15 for lilo, unlimited for grub and elilo) -the title is shortened to a (unique) entry. +\fB-\-info\fR=\fIkernel-path\fR +Display information on all boot entries which match \fIkernel-path\fR. I .TP -\fB-\-update-kernel\fR=\fIkernel-path\fR -The entries for kernels matching \fRkernel-path\fR are updated. Currently -the only items that can be updated is the kernel argument list, which is -modified via the \fB-\-args\fR and \fB-\-remove-args\fR options. +\fB-\-bootloader-probe\fR +\fBgrubby\fR tries to determine if \fBgrub\fR or \fBlilo\fR is currently +installed. When one of those bootloaders is found the name of that bootloader +is displayed on stdout. Both could be installed (on different devices), and +grubby will print out the names of both bootloaders, one per line. The probe +for \fBgrub\fR requires a commented out boot directive \fBgrub.conf\fR +identical to the standard directive in the lilo configuration file. If this +is not present \fBgrubby\fR will assume grub is not installed (note +that \fBanaconda\fR places this directive in \fBgrub.conf\fR files it creates). +This option is only available on ia32 platforms. .TP \fB-\-version\fR Display the version of \fBgrubby\fR being run and then exit immediately. +.SS Output Format Options + +.TP +\fB-\-elilo\fR +Use an \fBelilo\fR style configuration file. + +.TP +\fB-\-grub\fR +Use a \fBgrub\fR style configuration file instead of \fBlilo\fR style. This +is the default on ia32 platforms. + +.TP +\fB-\-lilo\fR +Use a \fBlilo\fR style configuration file. + .TP \fB-\-yaboot\fR Use an \fByaboot\fR style configuration file. @@ -166,7 +188,35 @@ \fB-\-zipl\fR Use an \fBzipl\fR style configuration file. -.SH MULTIBOOT OPTIONS +.SS Override Options + +.TP +\fB-\-bad-image-okay\fR +When \fBgrubby\fR is looking for a entry to use for something (such +as a template or a default boot entry) it uses sanity checks, such as +ensuring that the kernel exists in the filesystem, to make sure +entries that obviously won't work aren't selected. This option overrides +that behavior, and is designed primarily for testing. + +.TP +\fB-\-boot-filesystem\fR=\fIbootfs\fR +The \fBgrub\fR boot loader expects file paths listed in it's configuration +path to be relative to the top of the filesystem they are on, rather then +relative to the current root filesystem. By default \fBgrubby\fR searches +the list of currently mounted filesystems to determine this. If this option +is given \fBgrubby\fR acts as if the specified filesystem was the filesystem +containing the kernel (this option is designed primarily for testing). + +.TP +\fB-\-config-file\fR=\fIpath\fR +Use \fIpath\fR as the configuration file rather then the default. + +\fB-\-devtree\fR=\fIpath\fR +Use \fIpath\fR for device tree path in place of the path of any devicetree +directive found in the template stanza. + +.SS Multiboot Options + The Multiboot Specification provides a genreic interface for boot loaders and operating systems. It is supported by the GRUB bootloader. @@ -178,34 +228,36 @@ .TP \fB-\-remove-multiboot\fR=\fImultiboot-path\fR -Removes all boot entries which match \fImultiboot-path\fR. +Removes all boot entries which match \fImultiboot-path\fR. .TP \fB-\-mbargs\fR=\fImultiboot-args\fR -When a new multiboot kernel is added, this specifies the command line -arguments which should be passed to that kernel by default +When a new multiboot kernel is added, this specifies the command line +arguments which should be passed to that kernel by default When \fB-\-update-kernel\fR is used, this specifies new arguments to add to the argument list. Multiple, space separated arguments may be used. If -an argument already exists the new value replaces the old values. +an argument already exists the new value replaces the old values. .TP \fB-\-remove-mbargs\fR=\fImultiboot-args\fR -The arguments specified by \fImultiboot-args\fR are removed from the -kernels specified by \fB-\-update-kernel\fR. - +The arguments specified by \fImultiboot-args\fR are removed from the +kernels specified by \fB-\-update-kernel\fR. .SH "BUGS" + The command line syntax is more than a little baroque. This probably won't be fixed as \fBgrubby\fR is only intended to be called from shell scripts which can get it right. .SH "SEE ALSO" + .BR grub (8), .BR lilo (8), .BR yaboot (8), .BR mkinitrd (8) .SH AUTHORS + .nf Erik Troan Jeremy Katz