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Greg Bray
Asked: 2015-02-11 17:13:19 +0800 CST

Cygwin startup error /usr/bin/id: cannot find name for group ID

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I use cygwin at work to get quick access to unix tools and as an ssh terminal. I recently installed some new Cygwin packages and now when I try and open a terminal it is very slow and gives the following error:

/usr/bin/id: cannot find name for group ID 10519

I'm not sure what the error means, but it takes much longer to open a cygwin terminal now than it use to.

windows

4 Answers

  1. It appears to be related to my Active Directory username or group memberships. The error went away after running the following command as per this article:

    mkpasswd -l -c > /etc/passwd; mkgroup -l -d > /etc/group

    This updates the cygwin files with the latest AD user/group information.

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  2. None of the modifications of /etc/group nor /etc/passwd helped me (not even those from the cited article). The problem was that I was trying to install babun under Domain User but without connection to the Domain network. After connecting to the Domain network everything worked fine out of the box.

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  3. Instead of

    mkgroup -l -d > /etc/group

    I fixed the groups by issuing the two commands

    mkgroup -l > /etc/group
mkgroup -c >> /etc/group

    suggested further down in the comments of the article Cygwin users and groups.

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  4. For me, a combination of the last two approaches worked:

    1. Running babun install as the domain's user while in the domain, so that babun reinstalls.
    2. Re-populating /etc/group from mkgroup -l and -c.
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