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Linux in a Nutshell

This directory of Linux commands is from Linux in a Nutshell, 5th Edition.

Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.

Buy it now, or read it online on Safari Bookshelf.



rootflags

rootflags [option] image [flags [offset] ]

System administration command. Set flags for a kernel image. If no arguments are specified, print flags for the kernel image. flags is a 2-byte integer located at offset 498 in a kernel image. Currently the only effect of flags is to mount the root filesystem in read-only mode if flags is nonzero. You may change flags by specifying the kernel image to change, the new flags, and the byte offset at which to place the new information (the default is 498). Note that rdev -R is a synonym for rootflags. If LILO is used, rootflags is not needed. flags can be set from the LILO prompt during a boot.

Option

-o offset

Same as specifying an offset as an argument.

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