Posts Tagged bash

Simple script to add a new Virtual Host on Mac OSX

Posted by Andrea De Pirro in bash, Unix on June 23, 2011

Ideally when you develop a lot of websites on a local machine on OSX you have to create a virtual host for each website.
Below we will describe a really simple script to do this boring operation automatically.

Firstly a simple control to remember you have to choose a host name:

#!/bin/sh
if [ $# -lt 1 ]
then
echo
echo "You have to choose a host name!"
exit 0
fi

Then append a new host to the hosts file and verify it’s all right with a cat:

echo "\n" >> /etc/hosts
echo "127.0.0.1 $1" >> /etc/hosts
cat /etc/hosts

Now you can append the new Virtual Host to the apache configuration file httpd-vhosts.conf:

echo "\n" >> /etc/apache2/extra/httpd-vhosts.conf
echo "<VirtualHost *:80>" >> /etc/apache2/extra/httpd-vhosts.conf
echo " ServerAdmin yourmail@email.com" >> /etc/apache2/extra/httpd-vhosts.conf
echo " DocumentRoot /Library/WebServer/Documents/$1/" >> /etc/apache2/extra/httpd-vhosts.conf
echo " ServerName $1" >> /etc/apache2/extra/httpd-vhosts.conf
echo " ErrorLog \"/private/var/log/apache2/$1-error_log\"" >> /etc/apache2/extra/httpd-vhosts.conf
echo " CustomLog \"/private/var/log/apache2/$1-access_log\" common" >> /etc/apache2/extra/httpd-vhosts.conf
echo " <Directory \"/Library/WebServer/Documents/$1/\">" >> /etc/apache2/extra/httpd-vhosts.conf
echo " Options All" >> /etc/apache2/extra/httpd-vhosts.conf
echo " AllowOverride All" >> /etc/apache2/extra/httpd-vhosts.conf
echo " Order allow,deny" >> /etc/apache2/extra/httpd-vhosts.conf
echo " Allow from all" >> /etc/apache2/extra/httpd-vhosts.conf
echo " </Directory>" >> /etc/apache2/extra/httpd-vhosts.conf
echo "</VirtualHost>" >> /etc/apache2/extra/httpd-vhosts.conf
cat /etc/apache2/extra/httpd-vhosts.conf

Finally restart apache:

apachectl restart

This is the final script:

#!/bin/sh
if [ $# -lt 1 ]
then
echo
echo "You have to choose a host name!"
exit 0
fi
echo "\n" >> /etc/hosts
echo "127.0.0.1 " >> /etc/hosts
cat /etc/hosts
echo "\n" >> /etc/apache2/extra/httpd-vhosts.conf
echo "<VirtualHost *:80>" >> /etc/apache2/extra/httpd-vhosts.conf
echo " ServerAdmin yourmail@email.com" >> /etc/apache2/extra/httpd-vhosts.conf
echo " DocumentRoot /Library/WebServer/Documents//" >> /etc/apache2/extra/httpd-vhosts.conf
echo " ServerName " >> /etc/apache2/extra/httpd-vhosts.conf
echo " ErrorLog \"/private/var/log/apache2/-error_log\"" >> /etc/apache2/extra/httpd-vhosts.conf
echo " CustomLog \"/private/var/log/apache2/-access_log\" common" >> /etc/apache2/extra/httpd-vhosts.conf
echo " <Directory \"/Library/WebServer/Documents//\">" >> /etc/apache2/extra/httpd-vhosts.conf
echo " Options All" >> /etc/apache2/extra/httpd-vhosts.conf
echo " AllowOverride All" >> /etc/apache2/extra/httpd-vhosts.conf
echo " Order allow,deny" >> /etc/apache2/extra/httpd-vhosts.conf
echo " Allow from all" >> /etc/apache2/extra/httpd-vhosts.conf
echo " </Directory>" >> /etc/apache2/extra/httpd-vhosts.conf
echo "</VirtualHost>" >> /etc/apache2/extra/httpd-vhosts.conf
cat /etc/apache2/extra/httpd-vhosts.conf
apachectl restart

download it here.
Once unzipped remember to edit the email on the script, and to make it executable with:

chmod +x newHost.sh

To execute the command you have to sudo (apache and the 2 files are root property):

sudo ./newHost chosenHostName

, , , , ,

No Comments

How to execute remote ssh commands without interactive password

Posted by Andrea De Pirro in bash, ssh, Unix on February 4, 2011

When you manage a lot of remote machines sometimes you need to write scripts to automate commands to be executed or open multiple shells to look at logs.
For security reasons SSH doesn’t give you a -p option to set a password to launch a session, but this can be circumvented with a command line tool called sshpass (you can find it in several repositories, Google is your friend). Mind you! SSH doesn’t give you this ability because is really difficult to store password in a secure way! So don’t blame me if your system will be compromised :D
Basically sshpass is a wrapper that add the -p option, so if you want to launch an ssh session just type this:
sshpass -p password ssh user@host

Sometimes you want to execute commands on the remote machine (like open a given folder) and keep the connection open. To do this just add the -t option and the command followed by the command bash separated by a semi-colon:
sshpass -p password ssh user@host -t "cd /some/folder/you/want/to/open;bash"

Another cool trick if you are under gnome is to open a separated terminal window:
gnome-terminal -e "sshpass -p password ssh user@host -t \"cd /some/folder/you/want/to/open;bash\""

You can even open multiple tabs in the same window with a title for each one:
gnome-terminal --tab -e "sshpass -p password ssh user@host1 -t \"cd /some/folder/you/want/to/open;bash\"" --title "Server1" --tab -e "sshpass -p password ssh user@host2 -t \"cd /some/folder/you/want/to/open;bash\"" --title "Server2"

For convenience you can add the –maximize option at the end to open the terminal full screen.
Just keep in mind that this method is quite unsecure, so use it at your own risk.

, , , ,

No Comments