有没有办法暂时忽略我的~/.ssh/known_hosts文件？
mbp:~ alexus$ ssh 10.52.11.171
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx.
Please contact your system administrator.
Add correct host key in /Users/alexus/.ssh/known_hosts to get rid of this message.
Offending RSA …我的环境：
# uname -a
Linux app11 4.9.0-5-amd64 #1 SMP Debian 4.9.65-3+deb9u2 (2018-01-04) x86_64 GNU/Linux
#
# cat /etc/*release
PRETTY_NAME="Debian GNU/Linux 9 (stretch)"
NAME="Debian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"
#
在尝试运行时apt-get update，我收到了一堆错误：
# apt-get update
Ign:1 http://deb.debian.org/debian stretch InRelease
Hit:2 http://security.debian.org stretch/updates InRelease
Hit:3 http://deb.debian.org/debian stretch-updates InRelease
Hit:4 http://deb.debian.org/debian stretch-backports InRelease
Hit:5 http://deb.debian.org/debian stretch Release
Get:6 http://packages.cloud.google.com/apt cloud-sdk-stretch InRelease [6,377 B]
Ign:7 https://artifacts.elastic.co/packages/6.x/apt stable InRelease
Hit:8 https://artifacts.elastic.co/packages/6.x/apt stable Release
Get:9 http://packages.cloud.google.com/apt google-compute-engine-stretch-stable InRelease [3,843 B]
Get:10 …我正在尝试NFS在两个 RHEL7 节点之间进行配置：
第一个节点：
[root@ip-10-164-175-246 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.0 (Maipo)
[root@ip-10-164-175-246 ~]# rpm -q nfs-utils
nfs-utils-1.3.0-0.el7.x86_64
[root@ip-10-164-175-246 ~]# cat /etc/exports
/var/www/html/ ip-10-184-161-46.ec2.internal(rw)
[root@ip-10-164-175-246 ~]#
第二个节点：
[root@ip-10-184-161-46 ~]# mount ip-10-164-175-246.ec2.internal:/var/www/html/ /mnt/
[root@ip-10-184-161-46 ~]# touch /mnt/$$
touch: cannot touch ‘/mnt/3326’: Permission denied
[root@ip-10-184-161-46 ~]#
为什么我不能通过/mnt/NFS写入任何内容？
我有以下输出git status，我如何grep处理之后的所有内容Untracked files：
[alexus@wcmisdlin02 Test]$ git status
# On branch master
#
# Initial commit
#
# Changes to be committed:
# (use "git rm --cached <file>..." to unstage)
#
# new file: app/.gitignore
# new file: app/app.iml
# new file: app/build.gradle
# new file: app/proguard-rules.pro
# new file: app/src/androidTest/java/org/alexus/test/ApplicationTest.java
# new file: app/src/main/AndroidManifest.xml
# new file: app/src/main/java/org/alexus/test/MainActivity.java
# new file: app/src/main/res/layout/activity_main.xml
# new file: app/src/main/res/menu/menu_main.xml
# new file: app/src/main/res/mipmap-hdpi/ic_launcher.png
# new file: app/src/main/res/mipmap-mdpi/ic_launcher.png …我正在尝试遵循参数/示例，但在执行 Ansible'playbook 时遇到以下警告消息：
TASK [apt (pre)] ********************************************************************************************
[WARNING]: The value True (type bool) in a string field was converted to u'True' (type string). If this does
not look like what you expect, quote the entire value to ensure it does not change.
剧本的相关部分：
- name: apt (pre)
apt:
update_cache: yes
upgrade: yes
请指教。
我需要限制某些用户，以便他们只能使用 ssh 密钥进行 SSH，而其他用户可以使用密钥或密码登录。
一个例子：
我希望 root 用户能够使用密钥远程登录（通过 sshd），因此不会接受密码（即使密码正确）
对于其他用户（系统上的每个人），他们可以使用密钥和/或密码登录
我该怎么做？
我试图安装和卸载postgres9.3。在执行了各种步骤后，我发现我手动删除了一些东西，现在我无法进一步进行。
我在这里试图实现的是删除postgres. 我无法删除postgresql93-server-9.3.6-1PGDG.rhel5包。
我收到以下错误：
[root(at)ZetaSearch01 ~]# rpm -qa | grep postg
postgresql93-server-9.3.6-1PGDG.rhel5
[root(at)ZetaSearch01 ~]# yum remove postgresql93-server-9.3.6-1PGDG.rhel5
Loaded plugins: rhnplugin, security
Setting up Remove Process
Resolving Dependencies
--> Running transaction check
---> Package postgresql93-server.x86_64 0:9.3.6-1PGDG.rhel5 set to be erased
--> Finished Dependency Resolution
Dependencies Resolved
========================================================================================================================================================================
Package
Arch
Version
Repository Size
========================================================================================================================================================================
Removing:
postgresql93-server
x86_64
9.3.6-1PGDG.rhel5
installed 15 M
Transaction Summary
========================================================================================================================================================================
Install 0 Package(s)
Update 0 Package(s)
Remove 1 Package(s)
Is this ok …如何阻止 Varnish 的 VCL 文件中网络范围的任一 IP 地址？
我正在关注将 Solr 投入生产 | Apache Solr 参考指南 8.5，但是无法克服重新启动solr服务时的警告：
# service solr restart
*** [WARN] *** Your open file limit is currently 1024.
It should be set to 65000 to avoid operational disruption.
If you no longer wish to see this warning, set SOLR_ULIMIT_CHECKS to false in your profile or solr.in.sh
*** [WARN] *** Your Max Processes Limit is currently 1024.
It should be set to 65000 to avoid operational disruption.
If you no longer wish to …