vi /etc/sysconfig/network-scripts/ifcfg-enp0s3
onboot=no 改为 yes
shutdown -h now
cp /etc/sysconfig/network-scripts/ifcfg-enp0s3 /etc/sysconfig/network-scripts/ifcfg-enp0s8
uuidgen enp0s8 >> /etc/sysconfig/network-scripts/ifcfg-enp0s8
vi /etc/sysconfig/network-scripts/ifcfg-enp0s8
修改网卡名称，MAC地址
systemctl restart network
reboot
端口，通信
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服务间的通信，通过TCP协议，排查问题时用 netstat -pantu | grep 2230 netstat -pantu | grep :2230
vimium快捷键
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书签搜索，b 书签，历史记录搜索， o, O 刷新页面， r
AttributeError module 'threading' has no attribute 'Thread'
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运行报错 AttributeError: module 'threading' has no attribute 'Thread' 原来是我的文件名叫做threading.py，所以import的就是本文件 python3 /tmp/pycharm_project_570/threading.py https://stackoverflow.com/questions/19717402/attributeerror-of-threading-thread-in-python-2-7-5
centos7安装Python3
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wget下载最新的Python包，比如3.7 解压 安装依赖 yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel libffi-devel cd Python-3.7.3 ./configure --prefix=/usr/local/python37 make make install ln -s /usr/local/python37/bin/python3.7 /usr/bin/python3 ln -s /usr/local/python37/bin/pip3 /usr/bin/pip3 参考 https://www.cnblogs.com/progor/p/8445694.html https://stackoverflow.com/questions/27022373/python3-importerror-no-module-named-ctypes-when-using-value-from-module-mul
java 内存溢出排查
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在开发环境把运行内存调小
-XX:NativeMemoryTracking=summary -Xms128m -Xmx128m -XX:MaxDirectMemorySize=64M
让它溢出，根据报错的调用桟确定原因
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:3332)
at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:124)
at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:448)
at java.lang.StringBuilder.append(StringBuilder.java:136)
at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:230)
at ch.qos.logback.classic.spi.LoggingEvent.getFormattedMessage(LoggingEvent.java:298)
at ch.qos.logback.classic.spi.LoggingEvent.prepareForDeferredProcessing(LoggingEvent.java:208)
at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:212)
at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:103)
at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:88)
at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48)
at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:273)
at ch.qos.logback.classic.Logger.callAppenders(Logger.java:260)
at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:442)
at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:396)
at ch.qos.logback.classic.Logger.warn(Logger.java:725)
at com.to8to.server.db.DefaultConnectionHook.onQueryExecuteTimeLimitExceeded(DefaultConnectionHook.java:97)
at com.jolbox.bonecp.StatementHandle.queryTimerEnd(StatementHandle.java:280)
at com.jolbox.bonecp.PreparedStatementHandle.executeUpdate(PreparedStatementHandle.java:210)
at com.shejiben.sync.DmpSync.saveData(DmpSync.java:243)
at com.shejiben.sync.DmpSync.syncDmpData(DmpSync.java:179)
at com.shejiben.sync.DmpSync.run(DmpSync.java:104)
at com.shejiben.sync.DmpSync.main(DmpSync.java:299)
这里是业务代码，
at com.shejiben.sync.DmpSync.saveData(DmpSync.java:243)
搜索发现
https://blog.csdn.net/ismr_m/article/details/50999917#
忘了close()
scp传输报错
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The authenticity of host '[192.168.1.154]:10086 ([192.168.1.154]:10086)' can't be established.
RSA key fingerprint is SHA256:ehS4wKub7nvCZtPNZjeGCb8PM4tYj+zi+TcA2hdNhB0.
RSA key fingerprint is MD5:6c:b0:36:1c:68:3d:12:96:87:3f:0a:32:b2:13:ba:c0.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[192.168.1.154]:10086' (RSA) to the list of known hosts.
|-----------------------------------------------------------------|
| This system is for the use of authorized users only. |
| Individuals using this computer system without authority, or in |
| excess of their authority, are subject to having all of their |
| activities on this system monitored and recorded by system |
| personnel. |
| |
| Anyone using this system expressly consents to such monitoring |
| and is advised that if such monitoring reveals possible |
| evidence of criminal activity, system personnel may provide the |
| evidence of such monitoring to law enforcement officials. |
|-----------------------------------------------------------------|
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: UNPROTECTED PRIVATE KEY FILE! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0650 for '/root/.ssh/id_rsa' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
Load key "/root/.ssh/id_rsa": bad permissions
Password:
解决：id_rsa密钥降低权限，降为600
[root@to8to java_run]# ll /root/.ssh/id_rsa
-rw-r-x---+ 1 root root 1675 May 15 10:07 /root/.ssh/id_rsa
[root@to8to java_run]# chmod g-r /root/.ssh/id_rsa
[root@to8to java_run]# ll /root/.ssh/id_rsa
-rw---x---+ 1 root root 1675 May 15 10:07 /root/.ssh/id_rsa
[root@to8to java_run]# chmod -x /root/.ssh/id_rsa
[root@to8to java_run]# ll /root/.ssh/id_rsa
-rw-------+ 1 root root 1675 May 15 10:07 /root/.ssh/id_rsa
参考
https://www.cnblogs.com/softidea/p/6208725.html
git fetch 和 pull 区别
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git pull == git fetch + git merge git fetch origin master git log -p master..origin/master git merge origin/master
fiddler切环境失败
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没流量经过 没开启 capturing
virtualbox导入metasploitable
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下载metasploitable http://220.112.193.194/files/1109000004D2DC0A/101.110.118.19/nchc.dl.sourceforge.net/project/metasploitable/Metasploitable2/metasploitable-linux-2.0.0.zip 解压，里面有vmdk文件 在virtualbox创建虚拟机，linux, other linux, 64位 创建硬盘时选择已有硬盘，选择 vmdk文件 完成 配置双网卡 启动，账号密码都是 msfadmin 第二块网卡还没IP，改网络配置 改成 # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet dhcp # The primary network interface auto eth1 iface eth1 inet dhcp sudo /etc/init.d/networking restart