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16.4.2. Modifying Files with guestfish

To modify files, create directories or make other changes to a guest virtual machine, first heed the warning at the beginning of this section: your guest virtual machine must be shut down. Editing or changing a running disk with guestfish will result in disk corruption. This section gives an example of editing the /boot/grub/grub.conf file. When you are sure the guest virtual machine is shut down you can omit the --ro option in order to get write access via a command such as: 
guestfish -d RHEL3 -i

Welcome to guestfish, the libguestfs filesystem interactive shell for
 editing virtual machine filesystems.

 Type: 'help' for help on commands
       'man' to read the manual
       'quit' to quit the shell

 Operating system: Red Hat Enterprise Linux AS release 3 (Taroon Update 9)
 /dev/vda2 mounted on /
 /dev/vda1 mounted on /boot

><fs> edit /boot/grub/grub.conf
Copy to Clipboard Toggle word wrap
Commands to edit files include edit, vi and emacs. Many commands also exist for creating files and directories, such as write, mkdir, upload and tar-in.
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