On Wed, Jul 29, 2015 at 04:18:02PM +0800, Yu Liu wrote: [...] > Let's make an example: > > #guestfish -a disk.img >> run >> mount /dev/sda1 / >> write-append /a.txt "Hello\n" >> write-append /a.txt "World\n" >> cat /a.txt > Hello > World > >> quit > Another try: > eval `guestfish --listen` > guestfish --remote add disk.img > guestfish --remote run > guestfish --remote mount /dev/sda1 / > guestfish --remote write-append /a.txt "Hello\n" > guestfish --remote write-append /a.txt "World\n" > guestfish --remote cat /a.txt > Hello\nWorld\n > > # > libguestfs-1.20.11-11.el6.x86_64 The problem is that \n is handled "specially" by guestfish when it is reading the ><fs> command line, but not when it is parsing commands sent via --remote. The way to do this is: $ guestfish --remote write /a.txt "hello world" $ guestfish --remote cat /a.txt hello world Note that you have to actually press the [Return] key after "hello Probably a better plan is to use something like python remoting: https://rwmj.wordpress.com/2013/05/07/using-libguestfs-remotely-with-pyth... which will be more predictable. Rich.

On Thu, Jul 30, 2015 at 09:45:38AM +0800, Yu Liu wrote: > Ah, I see. Many thanks. > > BTW, I see a function that it can add a ssh remote image, like > guestfish -a ssh://root@example.com/path/disk.img, it's really > powerful, but why couldn't I secceed? > > #guestfish -a http://slcn03cn15.us.oracle.com/packages/test1.img > http://slcn03cn15.us.oracle.com/packages/test1.img: No such file or > directory >>> libguestfs-1.20.11-11.el6.x86_64 For a couple of reasons: (1) This feature wasn't available in 1.20 (added in 1.22). (2) We disable this feature in RHEL 7. It works upstream and in Fedora & Debian. This is because we don't want to support it for RHEL customers. OEL is free to enable it if you want to support that -- it requires changes to the block device whitelist in the qemu spec file, as well as removing the disabling patch from the libguestfs spec file (0098-RHEL-7-Disable-unsupported-remote-drive-protocols-RH.patch). Rich.

On Thu, Jul 30, 2015 at 04:47:57PM +0800, Yu Liu wrote: > Well, is it possible to enable it with 1.20 on OEL6.6? No, the feature wasn't implemented until 1.22. Rich.