Skip to main content

How to access remote server using PHP SSH?

To remotely access a server in PHP provides a full library of functions called SSH2 functions. You can get the manual from the link. You'll get most of the information from the manual itself but it also leaves the user with some questions which are unanswered. Here i am just trying to explain the same in some better way..

Simple Example : 

<?php
    if (!function_exists("ssh2_connect"))
        die("function ssh2_connect doesn't exist");
    if(!($con = ssh2_connect("www.example.com", 22(port number)))){
        echo "fail: unable to establish connection\n";
    } else {
        if(!ssh2_auth_password($con, "username", "password")) {
            echo "fail: unable to authenticate\n";
        } else {
            echo "okay: root logged in...\n";
            $stream = shell_exec("mkdir /var/www/shiv");
        }
    }

?>

Important Notes :

1) If you are logged in as a normal user(not root user) then you can't change user and login to the root or super user using these function. You can use su as a command but can't enter password as a command because server only allow the user to enter password through standard input device. For example if you are trying like this:

$stream = shell_exec("su; superuser password");

then it won't work.

2) If you want to run multiple commands then you have to use single shell_exec() function for that. For example :

$stream = shell_exec("mkdir /var/www/shiv; mkdir /var/www/modi");

It would create two sub-directories named 'shiv' and 'modi' in /var/www/ directory.


while


$stream = shell_exec("mkdir /var/www/shiv");
$stream = shell_exec("mkdir /var/www/modi");

commands won't work, because command n shell environment will not be remembered during the execution of command n+1.If you want the shell commands to be working while depending on each other in terms of environment, you should put several commands in a unique ssh2_exec().


Now you can run any number of commands on remote server. You can also use ssh php function to download, upload files etc....

Comments

Popular posts from this blog

Odoo/OpenERP: one2one relational field example

one2one relational field is deprecated in OpenERP version>5 but you can achieve the same using many2one relational field. You can achieve it in following two ways : 1) using many2one field in both the objects ( http://tutorialopenerp.wordpress.com/2014/04/23/one2one/ ) 2)  using inheritance by deligation You can easily find the first solution with little search over internet so let's start with 2nd solution. Scenario :  I want to create a one2one relation between two objects of openerp hr.employee and hr.employee.medical.details What I should do  i. Add _inherits section in hr_employee class ii. Add field medical_detail_id in hr_employee class class hr_employee(osv.osv):     _name = 'hr.employee'     _inherits = {' hr.employee.medical.details ': "medical_detail_id"}     _inherit = 'hr.employee'         _columns = {              'emp_code':fields.char('Employee Code', si

Odoo: Download Binary File in v10

To download any binary file in Odoo10 following is the link: http://127.0.0.1:8069/web/content?model=<module_name>&field=<field_name>&filename_field=<field_filename>&id=<object_id> module_name    - the name of the model with the Binary field field_name         - the name of the Binary field object_id            - id of the record containing particular file. field_filename    - name of a Char field containing file's name (optional). So if you want to call a function on button click and download the file, code is as follow: file_url = "http://127.0.0.1:8069/web/content?model=<module_name>&field=<field_name>&filename_field=<field_filename>&id=<object_id>" return {     'type': 'ir.actions.act_url',     'url': file_url,     'target': 'new' } In Reports or web page, you can use it as: <t t-foreach="files&qu

Odoo/ OpenERP: Customize one2many relational field

I was working on one2many relational field to integration one functionality. Worked on python code and then wrote an xml file for the same. Restarted my server. It showed me the row with headers and 'Add an item' button. When clicked on that it opened a pop-up to provide inputs. It shows all the fields with in sequence of it's own. Q1. I need input fields in other sequence or don't need all fields. A.   In xml you would have wrote code like this : <field name="dirtyhandsphp" widget="one2many_list" colspan="4" nolabel="1"> <tree string="Details">              <field name="field1" />              <field name="field2" />                      ---------------------------------------------              <field name="designation" />         </tree>                                                     </field> Add form section inside and