魚魚的小水族箱

轉載來自：https://www.nodebeginner.org/index-zh-tw.html
很好用的方法，記錄留存備用
 
function start(){
  console.log("Request handler 'start' was called.");
  function sleep(milliSeconds){
    var startTime =newDate().getTime();
    while(newDate().getTime()< startTime + milliSeconds);
  }
  sleep(10000);
  return"Hello Start";
}

最近比較大的範例都直接做一個測試專案放在雲端硬碟了，這個範例又小又常用，故此記錄一下。
import java.util.ArrayList;
import java.util.Arrays;

public class Test{

/*************** 轉換function  ***************/
// Java to JavaScript
public static String convertToJavaScriptValue(String str)
throws IOException
{
if ((str != null) && (!"".equals(str)))
{
str = replaceChar(str, '\n', "\\n");
str = replaceChar(str, '\r', "");
str = replaceChar(str, '\'', "&#039;");
str = replaceChar(str, '"', "&#034;");
}
return str;
}

 
如題，此情況常發生在把舊的server刪掉後再新增時，解法如下：
Quote:
1. Close Eclipse
2. In {workspace-directory}/.metadata/.plugins/org.eclipse.core.runtime/.settings delete the following two files:
org.eclipse.wst.server.core.prefs
org.eclipse.jst.server.tomcat.core.prefs
3. Restart Eclipse

介紹一下原理，簡單來說就是透過javascript去做一些字串處理與網頁導向的功能，
然後再利用listenonrepeat網站實現youtube的影片自動重播，以下是步驟：
一．新增書籤：

Invalid project path: Duplicate path entries found (/Test [Include path] isSystemInclude:true includePath:C:/MinGW/include), path: [/Test]. 
對於以上error我使用以下方法解決，但不見得對所有人的情況都適用：
1.對程式所屬專案名鍵->性properties -> C/C++ Build -> Discovery Options
2.點擊界面中的Clear
3.Eclipse重開
以上感謝hccloud大大提供

[PHP]參數傳遞遇特殊字元的解決方法
傳送端
<a href ="index.php?time=<?=urlencode("2013/04/11")?>&title=<?=urlencode("北市府系統架構(伺服器、服務項目、軟體系統)")?>">請點我</a>
接收端

新增admin使用者
useradd -d /home/staff/admin -s /bin/bash -g wheel admin
visudo

ffmpeg -formats：查看ffmpeg支援的格式
D=解碼，E=編碼
ffmpeg -i (檔案名稱)：查看檔案資訊，如解析度、bitrate

1.安裝Java JDK-1.6版本(自行至
http://www.oracle.com/technetwork/java/javase/downloads/index.html下載）

此文章轉貼自：http://www.zrwm.com/?p=3652
感謝Jose大大分享~~

環境說明

NFS-Server: 192.168.1.189 (Centos 6.3) 
NFS-Client: 192.168.1.193 (Centos 6.3)

NFS服務端(NFS-Server)

• 
  

  NFS-Server安裝

  
  

  [root@centos189 ~]# yum install nfs-utils portmap

  
  


• 
  

  NFS-Server配置

  
  

  創建共享目錄(設置讀寫權限):

  
  

  [root@centos189 ~]# mkdir -p /data/nfs_storage
  
   [root@centos189 ~]# chmod 755 /data/nfs_storage/

  
  

  導出共享目錄設置:

  
  

  [root@centos189 ~]# vi /etc/exports 
  
   [root@centos189 ~]# cat /etc/exports 
  
   /data/nfs_storage 192.168.1.0/24(rw,sync,no_root_squash,no_all_squash)

  
  

  注:NFS共享目錄為:/data/nfs_storage 
  192.168.1.0/24表示192.168.1.0-192.168.1.254區間的IP都可以訪問
  rw表示允許客戶端有讀寫權限(如只允許只讀,可使用ro) 
  sync表示當有新的文件/文件夾的時候即同步共享目錄
  no_root_squash表示允許root權限(用戶可以讀/寫/刪除共享目錄中的文件) 
  no_all_squash表示允許用戶的權限

  
  


• 
  

  iptables防火牆設置

  
  

  設置nfs相關端口:

  
  

  [root@centos189 ~]# vi /etc/sysconfig/nfs 
  
   [root@centos189 ~]# cat /etc/sysconfig/nfs 
  
   #
  
   # Define which protocol versions mountd 
  
   # will advertise. The values​​ are "no" or "yes"
  
   # with yes being the default
  
   #MOUNTD_NFS_V2="no"
  
   #MOUNTD_NFS_V3="no"
  
   #
  
   #
  
   # Path to remote quota server. See rquotad(8)
  
   #RQUOTAD="/usr/sbin/rpc.rquotad"
  
   # Port rquotad should listen on.
  
   RQUOTAD_PORT=875
  
   # Optinal options passed to rquotad
  
   #RPCRQUOTADOPTS=""
  
   #
  
   #
  
   # Optional arguments passed to in-kernel lockd
  
   #LOCKDARG=
  
   # TCP port rpc.lockd should listen on.
  
   LOCKD_TCPPORT=32803
  
   # UDP port rpc.lockd should listen on.
  
   LOCKD_UDPPORT=32769
  
   #
  
   #
  
   # Optional arguments passed to rpc.nfsd. See rpc.nfsd(8)
  
   # Turn off v2 and v3 protocol support
  
   #RPCNFSDARGS="-N 2 -N 3"
  
   # Turn off v4 protocol support
  
   #RPCNFSDARGS="-N 4"
  
   # Number of nfs server processes to be started.
  
   # The default is 8. 
  
   #RPCNFSDCOUNT=8
  
   # Stop the nfsd module from being pre-loaded
  
   #NFSD_MODULE="noload"
  
   # Set V4 grace period in seconds
  
   #NFSD_V4_GRACE=90
  
   #
  
   #
  
   #
  
   # Optional arguments passed to rpc.mountd. See rpc.mountd(8)
  
   #RPCMOUNTDOPTS=""
  
   # Port rpc.mountd should listen on.
  
   MOUNTD_PORT=892
  
   #
  
   #
  
   # Optional arguments passed to rpc.statd. See rpc.statd(8)
  
   #STATDARG=""
  
   # Port rpc.statd should listen on.
  
   STATD_PORT=662
  
   # Outgoing port statd should used. The default is port
  
   # is random
  
   STATD_OUTGOING_PORT=2020
  
   # Specify callout program 
  
   #STATD_HA_CALLOUT="/usr/local/bin/foo"
  
   #
  
   #
  
   # Optional arguments passed to rpc.idmapd. See rpc.idmapd(8)
  
   #RPCIDMAPDARGS=""
  
   #
  
   # Set to turn on Secure NFS mounts. 
  
   #SECURE_NFS="yes"
  
   # Optional arguments passed to rpc.gssd. See rpc.gssd(8)
  
   #RPCGSSDARGS=""
  
   # Optional arguments passed to rpc.svcgssd. See rpc.svcgssd(8)
  
   #RPCSVCGSSDARGS=""
  
   #
  
   # To enable RDMA support on the server by setting this to
  
   # the port the server should listen on
  
   #RDMA_PORT=20049

  
  

  重啟nfs:

  
  

  [root@centos189 ~]# /etc/init.d/nfs restart
  
   Shutting down NFS daemon: [ OK ]
  
   Shutting down NFS mountd: [ OK ]
  
   Shutting down NFS qu​​otas: [ OK ]
  
   Shutting down NFS services: [ OK ]
  
   Starting NFS services: [ OK ]
  
   Starting NFS qu​​otas: [ OK ]
  
   Starting NFS mountd: [ OK ]
  
   Starting NFS daemon: [ OK ]

  
  

  添加iptables規則(藍色粗體部分):

  
  

  [root@centos189 data]# vi /etc/sysconfig/iptables
  
   [root@centos189 data]# cat /etc/sysconfig/iptables
  
   # Firewall configuration written by system-config-firewall
  
   # Manual customization of this file is not recommended.
  
   *filter
  
   -A INPUT -m state --state NEW -m udp -p udp --dport 2049 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 2049 -j ACCEPT
  
   -A INPUT -m state --state NEW -m udp -p udp --dport 111 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 111 -j ACCEPT
  
   -A INPUT -m state --state NEW -m udp -p udp --dport 32769 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 32803 -j ACCEPT
  
   -A INPUT -m state --state NEW -m udp -p udp --dport 892 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 892 -j ACCEPT
  
   -A INPUT -m state --state NEW -m udp -p udp --dport 875 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 875 -j ACCEPT
  
   -A INPUT -m state --state NEW -m udp -p udp --dport 662 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 662 -j ACCEPT
  
   
  
   :INPUT ACCEPT ​​[0:0]
  
   :FORWARD ACCEPT ​​[0:0]
  
   :OUTPUT ACCEPT ​​[0:0]
  
   -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
  
   -A INPUT -p icmp -j ACCEPT
  
   -A INPUT -i lo -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 11300:11301 -j ACCEPT
  
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 4730:4731 -j ACCEPT
  
   -A INPUT -m state --state NEW -m udp -p udp --dport 514 -j ACCEPT
  
   -A INPUT -m state --state NEW -m udp -p udp --dport 3999:4000 -j ACCEPT
  
   -A INPUT -j REJECT --reject-with icmp-host-prohibited
  
   -A FORWARD -j REJECT --reject-with icmp-host-prohibited
  
   COMMIT

  
  

  重啟iptables:

  
  

  [root@centos189 data]# service iptables restart
  
   iptables: Flushing firewall rules: [ OK ]
  
   iptables: Setting chains to policy ACCEPT: filter [ OK ]
  
   iptables: Unloading modules: [ OK ]
  
   iptables: Applying firewall rules: [ OK ]

  
  


• 
  

  NFS啟動

  
  

  [root@centos189 ~]# chkconfig portmap on
  
   [root@centos189 ~]# chkconfig nfs on
  
   [root@centos189 ~]# service portmap start
  
   [root@centos189 ~]# service nfs start
  
   Starting NFS services: [ OK ]
  
   Starting NFS qu​​otas: [ OK ]
  
   Starting NFS mountd: [ OK ]
  
   Starting NFS daemon: [ OK ]

  
  

  檢查配置是否成功:

  
  

  [root@centos189 ~]# exportfs
  
   /data/nfs_storage
  
   192.168.1.0/24

  
  

NFS客戶端

• 
  

  NFS-Client安裝

  
  

  [root@centos193 ~]# yum install nfs-utils portmap

  
  


• 
  

  NFS-Client啟動

  
  

  [root@centos193 ~]# chkconfig portmap on
  
   [root@centos193 ~]# chkconfig nfs on
  
   [root@centos193 ~]# service portmap start
  
   [root@centos193 ~]# service nfs start
  
   Starting NFS services: [ OK ]
  
   Starting NFS qu​​otas: [ OK ]
  
   Starting NFS mountd: [ OK ]
  
   Starting NFS daemon: [ OK ]

  
  


• 
  

  NFS-Client掛載共享目錄

  
  

  創建掛載點:

  
  

  [root@centos193 ~]# mkdir -p /data/nfs_shared

  
  

  查看nfs能否訪問:

  
  

  [root@centos193 ~]# showmount -e 192.168.1.189
  
   Export list for 192.168.1.189:
  
   /data/nsf_storage 192.168.1.0/24

  
  

  掛載NFS-Server的共享目錄:

  
  

  [root@centos193 ~]# mount -t nfs 192.168.1.189:/data/nfs_storage /data/nfs_shared

  
  

  查看是否掛載成功:

  
  

  [root@centos193 data]# mount
  
   /dev/mapper/vg_centos6-lv_root on / type ext4 (rw)
  
   proc on /proc type proc (rw)
  
   sysfs on /sys type sysfs (rw)
  
   devpts on /dev/pts type devpts (rw,gid=5,mode=620)
  
   tmpfs on /dev/shm type tmpfs (rw)
  
   /dev/sda1 on /boot type ext4 (rw)
  
   /dev/mapper/vg_centos6-lv_home on /home type ext4 (rw)
  
   none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
  
   sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
  
   nfsd on /proc/fs/nfsd type nfsd (rw) 
  
   192.168.1.189:/data/nfs_storage on /data/nfs_shared type nfs (rw,vers=4,addr=192.168.1.189,clientaddr=192.168.1.193)
  
   

  
  


• 
  

  配置開機自動掛載

  
  

  編輯/etc/fstab文件,末尾添加如下藍色字部分內容:

  
  

  [root@centos193 ~]# vi /etc/fstab 
  
   [root@centos193 ~]# cat /etc/fstab 
  
   
  
   #
  
   # /etc/fstab
  
   # Created by anaconda on Fri Nov 23 20:21:40 2012
  
   #
  
   # Accessible filesystems, by reference, are maintained under '/dev/disk'
  
   # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
  
   #
  
   /dev/mapper/vg_centos6-lv_root / ext4 defaults 1 1
  
   UUID=edfaf4cd-ee8b-42c9-a45c-07339b42cc1c /boot ext4 defaults 1 2
  
   /dev/mapper/vg_centos6-lv_home /home ext4 defaults 1 2
  
   /dev/mapper/vg_centos6-lv_swap swap swap defaults 0 0
  
   tmpfs /dev/shm tmpfs defaults 0 0
  
   devpts /dev/pts devpts gid=5,mode=620 0 0
  
   sysfs /sys sysfs defaults 0 0
  
   proc /proc proc defaults 0 0
  
   
  
   //192.168.1.189:/data/nfs_storage /data/nfs_shared nfs rw,sync,hard,intr 0 0
  192.168.1.1:/services/Content /services/Content nfs rsize=8192,wsize=8192,timeo=14,intr
  
   

  
  

• 
  

  測試NFS

  
  

  客戶端: 
  [root@centos193 nfs_shared]# mkdir testdir 
  [root@centos193 nfs_shared]# touch testfile1 testfile2 
  服務端: 
  [root@centos189 ~]# cd /data/nfs_storage/ 
  [root@centos189 nfs_storage]# ls 
  testdir testfile1 testfile2

  
  

一．安裝NFS server
yum install nfs-utils
二．設定NFS server
vi /etc/exports