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参考 http://www.repoforge.org 安装yum源
不懂的命令请使用 man

计划任务：

crontab -e
vim /etc/cron*
vim /etc/crontab

查看CPU信息

less /proc/cpuinfo
lscpu

进程监控

yum install -y htop

MD5 SHA1校验

md5sum *.rpm
sha1sum *.rpm

系统监控

dstat --list
dstat --battery
dstat -c 2 5

监控磁盘系统

yum install -y iotop
iotop

磁盘性能检测

dd if=/dev/zero of=testfile bs=1M count=512 conv=fdatasync

yum install -y bonnie++
bonnie++ -u mskv

yum install -y iozone
izone -l 1 -u 1 -r 16k -s 128m -F tmpfile

挂载ntfs磁盘

mount.ntfs /dev/sda5 /mnt

分析磁盘使用率

du -sh
du -sh /etc

http://dl.fedoraproject.org/pub/epel/6/i386/
search "epel-release" and download this rpm package and install
install yum -y agedu
agedu -s /
agedu -s / -w
gedu -w --address 127.0.0.1:8080

agedu -s / --exctude "*" --include "*.conf"

监听当前使用端口

netstat -tupln netstate -at
netstate -nt | grep :80
lsof

网络流量监控分析

yum install -y wireshark wireshark-gnome
Applications-->internet-->wireshark network analyzer

网络实时监控

yum install iptraf
iptraf

网络抓包

yum install tcpdump
tcpdump -c 18 dumpfile.log
tcpdump -r dumpfile.log

tcpdump udp
tcpdump dst port 80
tcpdump host www.linuxcast.net
tcpdump greater 1000
tcpdump less 10

tcpdump -A
tcpdump -X
tcpdump src 192.168.2.100
tcpdump dst 192.168.2.105
tcpdump tcp and src 192.168.2.102 and port 1000
tcpdump not port 80
tcpdump tcp and src 192.168.2.102 and not port 1000

实时监控特定进程占用流量

view http://pkgs.org search "nethogs" and install this packages
nethogs
nethogs eth0

基于时间的iptables

iptables -A INPUT -p tcp --dport 80 -m time --timestart 09:00 --timestop 18:00 -j drop

nginx服务器

sudo yum groupinstall "Development Tools"
view http://nginx.org download binary packages and compile install error:
yum list | grep ncre
yum install -y ncre-devel
./configure no error make && make install

ruby on rails

yum install ruby ruby-devel ruby-irbs ruby-rdoc ruby-libs
download rubygems packeages and install
gem source --remove https://rebygems.org/
gem source -a http://ruby.taobao.org/
gem source -l
gem install rails
sudo rails new mskv-rails
sudo gem install sqlite3 -v '1.3.7'
sudo yum install sqlite-devel
vim Gemfile
add gem 'therubyracer'
sudo bundle install
sudo service httpd stop
sudo rails server

网站压力测试

yum groupinstall -y "Development Tools"
download httperf on code.google.com and install
httperf --hog --serve=127.0.0.1 --url=/index.html --num-conns=10000 "未成功" httperf --hog --serve=127.0.0.1 --num-conns=10000