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systemctl start service_name.service
[root@nfsserver ~]# yum install nfs-utils nfs-utils-lib
[root@nfsserver ~]# yum install portmap (not required with NFSv4)
//server ip:192.168.0.100
//client ip:192.168.0.101
//start service on both machines
[root@nfsserver ~]# /etc/init.d/portmap start
[root@nfsserver ~]# /etc/init.d/nfs start
[root@nfsserver ~]# chkconfig --level 35 portmap on
[root@nfsserver ~]# chkconfig --level 35 nfs on
//setting up server
[root@nfsserver ~]# mkdir /nfsshare
[root@nfsserver ~]# vi /etc/exports
/nfsshare 192.168.0.101(rw,async,no_root_squash)
//setting up the client
[root@nfsclient ~]# showmount -e 192.168.0.100
Export list for 192.168.0.100:
/nfsshare 192.168.0.101
//temporary mount:
[root@nfsclient ~]# mount -t nfs 192.168.0.100:/nfsshare /mnt/nfsshare
//permanent mount (fstab) across reboots
[root@nfsclient ~]# vi /etc/fstab
192.168.0.100:/nfsshare /mnt nfs defaults 0 0
//misc
[root@nfsclient ~]# mount | grep nfs
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)
192.168.0.100:/nfsshare on /mnt type nfs (rw,addr=192.168.0.100)
//on server open ports 2049 and 111,32803,32769
/*
may have to do:
vi /etc/sysconfig/nfs
uncomment:
LOCKD_TCPPORT=32803
LOCKD_UDPPORT=32769
MOUNTD_PORT=892
iptables -I INPUT -m state --state NEW -p tcp \
-m multiport --dport 111,892,2049,32803 -s 192.168.0.0/24 -j ACCEPT
iptables -I INPUT -m state --state NEW -p udp \
-m multiport --dport 111,892,2049,32769 -s 192.168.0.0/24 -j ACCEPT
*/
//mount in mac (ip is server's) (...and create a new user in mac to match nfs server uid)
sudo mount -t nfs -o resvport,nolocks,locallocks,intr,soft,wsize=32768,rsize=3276,async 172.16.1.46:/usr/share/nginx .
NFS Options
Some other options we can use in “/etc/exports” file for file sharing is as follows.
ro: With the help of this option we can provide read only access to the shared files i.e client will only be able to read.
rw: This option allows the client server to both read and write access within the shared directory.
sync: Sync confirms requests to the shared directory only once the changes have been committed.
no_subtree_check: This option prevents the subtree checking. When a shared directory is the subdirectory of a larger file system, nfs performs scans of every directory above it, in order to verify its permissions and details. Disabling the subtree check may increase the reliability of NFS, but reduce security.
no_root_squash: This phrase allows root to connect to the designated directory.
as of 01/2014:
http://www.tecmint.com/how-to-setup-nfs ... -in-linux/
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//dump a database
mysqldump -u UserName -p --host=dev.barney.com db_name > db_name_backup.sql
//compressed dump
mysqldump -u UserName -p --host=dev.barney.com db_name | gzip > db_name_backup.sql
//restore database
mysql -u UserName -p target_db_name < db_name_backup.sql
//dump and restore
mysqldump -u UserName -p --host=dev.barney.com db_name | mysql -u UserName -p target_db_name
[ view entry ] ( 1347 views ) | print article
//list all buckets
curl -i riak1.barney.com:8098/buckets?buckets=true
//putting/storing JSON in riak
curl -v -XPUT riak1.barney.com:8098/buckets/my_bucket/keys/my_test?returnbody=true \
-H "Content-Type: application/json" \
-d '{"TestName":"Monday test"}'
//listing keys in bucket
curl -i riak1.barney.com:8098/buckets/my_bucket/keys?keys=true
//fetch a key
curl -v riak1.barney.com:8098/buckets/my_bucket/keys/my_test
http://docs.basho.com/riak/latest/dev/using/basics/
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//SELECT * FROM tbl LIMIT 5,10; # Retrieve rows 6-15
$input = array("1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19");
print_r(array_slice($input,5,10));
Output:
Array
(
[0] => 6
[1] => 7
[2] => 8
[3] => 9
[4] => 10
[5] => 11
[6] => 12
[7] => 13
[8] => 14
[9] => 15
)
Complete Pagination Example:
function PaginateArray($input, $page, $show_per_page) {
$page = $page < 1 ? 1 : $page;
$start = ($page - 1) * ($show_per_page);
$offset = $show_per_page;
$outArray = array_slice($input, $start, $offset);
var_export($outArray);
}
$input = array("1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20");
//page 1
PaginateArray($input, 1, 3);//inputs: array, page, records per page
/*
array (
0 => '1',
1 => '2',
2 => '3',
)
*/
//page 2
PaginateArray($input, 2, 3);//inputs: array, page, records per page
/*
array (
0 => '4',
1 => '5',
2 => '6',
)
*/[ view entry ] ( 1460 views ) | print article
[Angel@localhost ~]$ mongo
> show collections; //equivalent to rdbms tables
> use test; //use test db
> db.test.count();
> db.test.find(); //all documents, a document is like a rdbms row.
> db.test.find({_id:ObjectId("52c351ffc5c629a6ca901ae5")});// where _id equals to...
> db.test.find({_id:ObjectId("52c351ffc5c629a6ca901ae5")},{'_id':0}); // _id field is not displayed
> db.test.update({_id:ObjectId("52c351ffc5c629a6ca901ae5")},{'field-to-update':'new-value'});//updating a field
> db.test.update({_id:ObjectId("52c351ffc5c629a6ca901ae5")},{$set:{'Year':2014}}); //add new field
[ view entry ] ( 1522 views ) | print article
//using table2csv plugin
//HTML:
<form action="getCSV.php" method ="post" >
<input type="hidden" name="csv_text" id="csv_text">
<input type="submit" value="Get CSV File"
onclick="getCSVData()"
</form>
<script>
function getCSVData(){
var csv_value=$('#tableID').table2CSV({delivery:'value'});
$("#csv_text").val(csv_value);
}
</script>
//php
<?php
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"my-data.csv\"");
$data=stripcslashes($_REQUEST['csv_text']);
echo $data;
?>
[ view entry ] ( 1282 views ) | print article
Tested solution:
function CurrencyFormat($cash) {
// strip any commas
$cash = (0 + str_replace(',', '', $cash));
// filter and format it
if($cash>1000000000000){
return "$".round(($cash/1000000000000),1).'T';
}elseif($cash>1000000000){
return "$".round(($cash/1000000000),1).'B';
}elseif($cash>1000000){
return "$".round(($cash/1000000),1).'M';
}elseif($cash>1000){
return "$".round(($cash/1000),1).'K';
}
}
echo CurrencyFormat('1,560,000');//outputs $1.6M
[ view entry ] ( 1831 views ) | print article
//draft
$csv='...CSV file (string) exported from open office spread sheet';
$lines = explode("\n", $csv);
$array = array();
foreach ($lines as $line) {
$array =str_getcsv($line);
echo "INSERT INTO TestTable SET `Field1`='".addslashes($array[3])."',
`Field2`='".addslashes($array[3])."',";
}
[ view entry ] ( 1393 views ) | print article
<?php
/*
Sample data.
*/
$items = array(
array('id'=>1, 'title'=>'Home', 'parent_id'=>0),
array('id'=>2, 'title'=>'News', 'parent_id'=>1),
array('id'=>3, 'title'=>'Sub News', 'parent_id'=>2),
array('id'=>4, 'title'=>'Articles', 'parent_id'=>0),
array('id'=>5, 'title'=>'Article', 'parent_id'=>4),
array('id'=>6, 'title'=>'Article2', 'parent_id'=>4)
);
/*
Group by parent.
*/
$itemsByParent = array();
foreach ($items as $item)
{
if (!isset($itemsByParent[$item['parent_id']]))
$itemsByParent[$item['parent_id']] = array();
$itemsByParent[$item['parent_id']][] = $item;
}
/*
Print list recursively.
*/
function printList($items, $parentId = 0)
{
echo '<ul>';
foreach ($items[$parentId] as $item)
{
echo '<li>';
echo $item['title'];
$curId = $item['id'];
//if there are children
if (!empty($items[$curId]))
{
printList($items, $curId);
}
echo '</li>';
}
echo '</ul>';
}
/*
Finds top parent given node id
*/
function findTopParent($id,$ibp)
{
foreach($ibp as $parentID=>$children)
{
foreach($children as $child)
{
if($child['id']==$id)
{
if($child['parent_id']!=0)
return findTopParent($child['parent_id'],$ibp);
else
return $child;
}
}
}
}
/*
Get all parents, aka. breadcrumbs.
*/
function getAllParents($id,$ibp)
{
foreach($ibp as $parentID=>$nodes)
{
foreach($nodes as $node)
{
if($node['id']==$id)
{
if($node['parent_id']!=0)
{
$a=getAllParents($node['parent_id'],$ibp);
array_push($a,$node['parent_id']);
return $a;
}
else
return array();
}
}
}
}
/*
Gets all subnodes; children, grand children, etc...
*/
function getDescendants($id,$ibp)
{
if(array_key_exists($id,$ibp))
{
$kids=array();
foreach($ibp[$id] as $child)
{
array_push($kids,$child['id']);
if(array_key_exists($child['id'],$ibp))
$kids=array_merge($kids,getDescendants($child['id'],$ibp));
}
return $kids;
}
else
return array();//supplied $id has no kids
}
// Print it!!
printList($itemsByParent);
// Find top parent!!
print_r(findTopParent(6,$itemsByParent));
/*
Array
(
[id] => 4
[title] => Articles
[parent_id] => 0
)
*/
// Find path!!
print_r(getAllParents(3,$itemsByParent));
/*
Array
(
[0] => 1
[1] => 2
)
*/
print_r(getDescendants(1,$itemsByParent));
/*
Array
(
[0] => 2
[1] => 3
)
*/
print_r(getDescendants(4,$itemsByParent));
/*
Array
(
[0] => 5
[1] => 6
)
*/
print_r(getDescendants(0,$itemsByParent));
/*
Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
)
*/
Output of printList:
- Home
- News
- Sub News
- News
- Articles
- Article
- Article2
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$(function(){
//prevent image cache
$('#a_img').attr('src',$('#a_img').attr('src')+'?rand='+Math.floor(Math.random()*10000));
//check for loading errors
$('#a_img').load().error(function(){
/* Legacy support kicking in */
var LegacyImg='http://www.example.com/dbimages/tag/h1/img_name.jpeg';
$('#a_img').attr('src',LegacyImg);
});
})
[ view entry ] ( 1292 views ) | print article
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