su 指令出現的問題: su: cannot set user id: Resource temporarily unavailable

IT_man

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某天因為需要從root su 到一般的user,指令如下:
/ ^* i2 y* G. j! D# p#su someuser  結果show error
# v; N2 \/ D! ^3 J- E7 jsu: cannot set user id: Resource temporarily unavailable

  Z; a* `6 ^; U查了google得知根本原因是process 最大限制是 1024:

  S7 N( l' u8 J9 C2 j0 W' A9 ?#cat /etc/security/limits.d/90-nproc.conf
# Default limit for number of user's processes to prevent
# accidental fork bombs.
' V* W( F  |; q' i8 x# See rhbz #432903 for reasoning.

% ]1 L5 V' c0 t$ K/ |8 _( _5 E*          soft    nproc     1024     ====>將1024改成大一點如4096就 OK
root       soft    nproc     unlimited
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