分类 Linux/unix/mac articles

fail2ban处理nginx下的恶意扫描

 | Linux/unix/mac 安全/漏洞
最近听说同行公司的数据库被人暴了，老大要求将我们自己的站点也做下检查。在查看nginx日志时，同样发现有人进行过恶意扫描。同时也为了防止别人恶性来公司站点上扒取数据。所以决定通过fail2ban配合iptables自动封掉这些IP。 发现的恶意扫描日志： 1access.log:112.122.134.43 - - [06/Oct/2012:21:27:22 +0800] "HEAD /flashfxp.zip HTTP/1.1" 404 0 "-" "Mozilla/4.0 (compatible; MSIE……

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pgrep无法匹配问题

 | Linux/unix/mac
在linux中查看进程信息，经常要用到pa auxf，具体到某个进程的时候，又需进行grep管道。如：ps auxf|grep java|grep -v grep ，即然这么长，可以不可以简化呢？当然可以，如果还是使用ps命令的话，可以改为ps auxf|grep jav[a]，这样就不用排除自身了。不过感觉命令还是长了点，能不能再简点，可以，使用p……

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linux主要配置文件总结

 | Linux/unix/mac
/boot目录，kernel相关部分 /boot/symvers-%{KRELEASE}.gz 保存着内核中所有符号的crc值 /boot/System.map-%{KRELEASE} 给kernel使用的符号表(symbol table) /boot/vmlinuz-%{KRELEASE} 可引导的、压缩的内核 /boot/initrd-%{KRELEASE}.img 包含了支持 Linux 系统两阶段引导过程所需要的必要可执行程序和系统文件 /boot/config-%{KRELEASE} 包括kernel的make config /boot/message cpio格式的打包文件，存放Grub的配置信息，里……

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linux进程状态

 | Linux/unix/mac
linux系统最常用的命令莫过于ps，经常要用其查看linux的进程和线程情况。此文我们着重来看进程 。进程又分为以下几种状态： 运行(正在运行或在运行队列中等待) 中断(休眠中, 受阻, 在等待某个条件的形成或接受到信号) 不可中断(收到信号不唤醒和不可运行, 进程必须等待直到有中断发生) 僵……

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LVM分区无损增减

 | Linux/unix/mac
LVM是建立在硬盘和分区之上的一个逻辑层，来提高磁盘分LVM区管理的灵活性。其结构为：PV——VG——LV——PE，LVM分区比较灵活的一个功能就是可以无损更改分区大小。目前我现网中的服务器也使用的是LVM分区，目前也遇到了某分区分间不足的问题，所以在测试环境上演练下更改分区大小……

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49个备份与恢复软件

 | Linux/unix/mac 开源软件
Backup—Network 1. <a href="http://www.amanda.org/">AMANDA</a> AMANDA stands for "Advanced Maryland Automatic Network Disk Archiver," and it's a very popular enterprise backup system that supports disk, tape and optical media backups. A cloud-based service that utilizes the same technology is available through <a href="http://www.zmanda.com/">Zmanda</a>, which is owned by Carbonite. Operating System: Windows, Linux, OS X 2. <a href="http://backuppc.sourceforge.net/">BackupPC</a> This network backup system can archive large numbers of files to local or networked disk storage. It uses pooling and compression to make the archived files as small as possible, reducing storage hardware capacity requirements and costs. Operating System: Windows, Linux 3. <a href="http://www.bacula.org/">Bacula</a> The Bacula website boasts, "According to Source Forge statistics (rank and downloads), Bacula is by far the most popular open source program backup program." It offers enterprise-grade……

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21 of the Best Free Linux Backup Tools

 | Linux/unix/mac 开源软件
Backup software is used to perform a complete back up of a file, data, database, system or server. It enables users to make a duplicate of everything contained on the original source. This type of software is also used to perform a recovery of the data or system in the event of a disaster. Making file backups is an essential activity for all users,yet many users do not take adequate steps to protect their data. Whether a computer is being used in a corporate environment, or for private use, the machine’s hard disk may fail without any warning signs. Alternatively, some data loss occurs as a result of human error.Without regular backups being made, data will inevitably be lost even if the services of a specialist recovery organisation are used. Whilst it……

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解决linux停在starting automount无法启动

 | Linux/unix/mac
公司的一台centos 6.0 X64系统测试机，把root密码给了好几个组的人用。天晓得他们在上面折腾什么！过了几天我要测试mysql-cluster，刚好少一台机器。结果发现登录不上了，我原以为其他组的人改了密码。问了他们，他们也说登录不了。本想重启下或重置下密码就能解决了！结果按上……

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shell 生成随机数与随机字符串

 | Linux/unix/mac shell脚本学习
一、生成随机数 1、使用系统的 $RANDOM 变量 1[root@361way ~]# echo $RANDOM 214436 2、增加整数实现范围 $RANDOM 的范围是 [0, 32767] ,如需要生成超过32767的随机数，可以用以下方法实现。 生成40000~50000的随机数 1#!/bin/bash 2function rand(){ 3 min=$1 4 max=$(($2-$min+1)) 5 num=$(($RANDOM+1000000000)) #增加一个10位的数再求余 6 echo $(($num%$max+$min)) 7} 8rnd=$(rand 40000 50000) 9echo $rnd 10exit 0 3、使用date +%s%N 1#!/bin/bash 2function rand(){ 3 min=$1 4 max=$(($2-$min+1)) 5 num=$(date +%s%N) 6 echo $(($num%$max+$min)) 7}……

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