495884965

http://www.pc-freak.net/blog/how-to-find-out-all-programs-bandwidth-use-with-nethogs-top-like-utility-on-linux/
Nethog

Curl可以透過檢查Etag
來確認檔案是否修改過
如果沒有則回應304

http://www.chriscalender.com/troubleshooting-waiting-for-table-metadata-lock-errors-for-both-myisam-and-innodb-tables/
http://www.chriscalender.com/tag/waiting-for-table-metadata-lock/


#show (full)  processlist;

http://lincolnloop.com/blog/tracking-application-response-time-nginx/
https://www.digitalocean.com/community/tutorials/how-to-configure-nginx-as-a-reverse-proxy-for-apache

#vi /etc/nginx/sites-available/default
location / {
    proxy_set_header X-Real-IP $remote_addr;

http://weizhifeng.net/nginx-proxy-cache.html
很棒的解說
Nginx效能解析

以apache為後端，Nginx為前端

http://lincolnloop.com/blog/tracking-application-response-time-nginx/
https://www.digitalocean.com/community/tutorials/how-to-configure-nginx-as-a-reverse-proxy-for-apache

#vi /etc/nginx/sites-available/default
location / {
    proxy_set_header X-Real-IP $remote_addr;

#crontab -e
30 20 8-14,22-28 * * test $(date +%u) -eq 1 && /usr/local/bin/backup.sh >> /var/log/backup.log 2>&1

date +%u ：顯示一週的第幾天

@Echo Off
echo | set /p=網路連現中.
:CheckNet
echo | set /p=.
ping -n 1 -w 1000 192.168.1.235 |find /I "Reply"

How to check if SSL v2 is enabled using openssl
http://www.aip.im/2012/04/how-to-check-if-ssl-v2-is-enabled-using-openssl/
OpenSSL Command-Line HOWTO
https://www.madboa.com/geek/openssl/#intro-version
openssl 指令 command line

#vi ~/.vimrc
set tabstop=4 shiftwidth=4 softtabstop=4 expandtab
將tab值設定為4個空白
非在4個倍數的會自動調整
syntax on