Arguments lost when running ssh host sh -c

Asked Feb 28 '23 at 08:20

Active Feb 28 '23 at 08:20

Viewed 17 times

Running ssh u@h command arguments works as expected:

$ ssh verence@dock df /run
Filesystem     1K-blocks  Used Available Use% Mounted on
tmpfs            6551280  1888   6549392   1% /run

If I add a shell on the remote host, the argument seems to be lost:

$ ssh verence@dock sh -c 'df /run'
Filesystem      1K-blocks     Used  Available Use% Mounted on
udev             32730924        0   32730924   0% /dev
tmpfs             6551280     1888    6549392   1% /run
/dev/nvme0n1p2 1920224544 17109596 1805499128   1% /
...

I'm probably missing something obvious here, but didn't find any clues. What is happening here?

asked Feb 28 '23 at 08:20

nohillside

3,251

@KamilMaciorowski Don't think so. Running ssh u@h sh -c 'echo; df /run' works as expected, so it doesn't directly seem to be a quoting issue. – nohillside Feb 28 '23 at 08:30
In this case you run sh -c echo; df /run on the remote. In your original case you run sh -c df /run. – Kamil Maciorowski Feb 28 '23 at 08:32
@KamilMaciorowski Ah, right, got it. Thanks. – nohillside Feb 28 '23 at 08:33
1

Also see the "discussion" part of this answer. You may find this question useful: How can I single-quote or escape the whole command line in Bash conveniently? – Kamil Maciorowski Feb 28 '23 at 08:36
@KamilMaciorowski indeed, thx. – nohillside Feb 28 '23 at 08:45

Arguments lost when running ssh host sh -c

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