$ sudo python ./hostname-edit.py [sudo] password for kashyap: libguestfs: trace: mount_options "" "/dev/mapper/VolGroup-lv_root" "/" libguestfs: trace: mount_options = 0 libguestfs: trace: download "/export/foo.txt" "/tmp/tmp7ZfxiL/filename" libguestfs: trace: download = 0 libguestfs: trace: upload "/tmp/tmp7ZfxiL/filename" "/export/foo.txt" libguestfs: trace: upload = 0 libguestfs: trace: umount_all libguestfs: trace: umount_all = 0 libguestfs: trace: sync libguestfs: trace: sync = 0 libguestfs: trace: close libguestfs: trace: internal_autosync libguestfs: trace: internal_autosync = 0 libguestfs: trace: kill_subprocess libguestfs: trace: kill_subprocess = 0