cd /etc/ssh

chmod 0644 *

chmod 0600 ssh_host_rsa_key

service sshd restart

日落际远漫苍茫,
但愁云渡锁浦江.
举目一望明灯火,
鳞次千家不寻常.

Error:

sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set.

Fixed:

reboot and login to recovery,

login to root prompt,

mount -o remount,rw /

mount –all

chown root:root /usr/bin/sudo

chmod 4755 /usr/bin/sudo

ls -l /usr/bin/sudo

chmod 644 /etc/passwd

chmod u+s /bin/su

reboot

曾几何,
怅然泪潸潸.
故人重逢歌一曲,
一壶甘冽半杯泉.
醉倒家门前.
不闭窗,
微醺意绵绵.
斜风细听江南雨,
恍然虚梦已十年.
我得半日闲.

Issue: cannot be loaded because the executionof scripts is disabled on this system. Please see “get- helpabout_signing” for more details.

Fix:

PS C:Windowssystem32> Set-ExecutionPolicyRemoteSigned

Execution Policy Change

The execution policy helps protect you from scripts that you donot trust. Changing the execution policy mightexpose

you to the security risks described in theabout_Execution_Policies help topic. Do you want to change theexecution

policy?

[Y] Yes [N] No [S] Suspend [?] Help (default is “Y”): Y

Policy的有效参数:

— Restricted: 不载入任何配置文件，不运行任何脚本。 “Restricted”是默认的。

— AllSigned: 只有被Trustedpublisher签名的脚本或者配置文件才能使用，包括你自己再本地写的脚本

— RemoteSigned: 对于从Internet上下载的脚本或者配置文件，只有被Trustedpublisher签名的才能使用。

— Unrestricted: 可以载入所有配置文件，可以运行所有脚本文件.如果你运行一个从internet下载并且没有签名的脚本，在运行之前，你会被提示需要一定的权限。

— Bypass: 所有东西都可以使用，并且没有提示和警告.

— Undefined: 删除当前scope被赋予的Execution Policy. 但是Group Policy scope的Execution Policy不会被删除.