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Date:	Sun, 9 Jan 2022 14:28:08 +0900 (JST)
From:	Tatsuro MATSUOKA <tmacchant2 AT yahoo DOT co DOT jp>
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>,
	Tatsuro MATSUOKA <tmacchant2 AT yahoo DOT co DOT jp>
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$ echo aaa > test.txt
$ ls -l  test.txt
-rw-r--r-- 1 user user 4 Jan  9 14:07 test.txt
$ chmod 600 test.txt
$ ls -l test.txt
-rw-r--r-- 1 user user 4 Jan  9 14:07 test.txt

I noticed this phenomena in launching the  jupyter lab.

  File "/usr/lib/python3.8/site-packages/jupyter_core/paths.py", line 909, in secure_write
    raise RuntimeError("Permissions assignment failed for secure file: '{file}'."
RuntimeError: Permissions assignment failed for secure file: '/home/user/.local/share/jupyter/runtime/jpserver-27580.json'. Got '0o644' instead of '0o0600'.

Workaround for the jupter lab error is
export JUPYTER_ALLOW_INSECURE_WRITES=true

Tatsuro


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