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ssh、slogin、su が遅くなった場合の対応の一つ

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状況

  • ubuntu 16.04 から 18.04 に upgrade した後に発生
  • slogin でのログイン、及び、su で root になる場合に時間がかかる
  • /var/log/auth.log には、以下のようなエラー
Oct  9 19:55:38 XXXXX sshd[4982]: pam_systemd(sshd:session): Failed to create session: Connection timed out
  • このメッセージで web を探すと見つかる、以下の対処方法が効かない
systemctl restart systemd-logind

有効な対処法

  • しばらく探し続けて見つけた、 https://www.ogre.com/node/518 の対応が有効だった。すなわち、

    • /etc/pam.d/common-session
    • /etc/pam.d/runuser-l
    • /etc/pam.d/systemd-user

の3つのファイル中にある、文字列 "pam_systemd.so" を含む行の先頭に "#" マークをつけて、コメントアウトする

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