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昨天突然无法 ssh 到云主机,但是可以 ping 通。从控制台上看没有异常,登陆进去后发现 ssh 服务没有启动,企图启动(重启)这个服务时报错 /dev/null is not a character device!:) Y* h4 o4 @0 I
* q1 K; j$ c; G+ a. g% {# /etc/init.d/ssh restart% o+ L4 z9 s5 E" ]
Restarting OpenBSD Secure Shell server: sshd failed!
9 C7 X2 I& u6 w/dev/null is not a character device!.: L3 w. g. l* E& M- A
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解决办法是,删除 /dev/null 后重建一个字符设备:
# m; r$ z3 p; L* e6 w# rm -f /dev/null. a% S5 O5 \" J" |! S0 x
# mknod /dev/null c 1 32 Y7 E. h& d, e/ R% }$ e- D
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然后启动(重启)ssh 就可以了:8 v3 N3 r; _0 s: c
# /etc/init.d/ssh restart
+ M, c" E0 Q$ NRestarting OpenBSD Secure Shell server: sshd.8 w* ^% l9 U% ]% O. K* p
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