Tag Archives | BASH

Raspberry Pi, Raspbian Jessie (based on Debian Jessie) disable AutoLogin GUI & Console

I did NOT want my Raspbian Jessie install to automatically boot into the GUI, and I did Not want it to autologin.

I know I can run raspi-config to change it, but I like to script things! I finally tracked down the code for the new raspi-config that supports systemd. It can be found here .

Here are the commands to change what used to be the run level.

Console

systemctl set-default multi-user.target
ln -fs /lib/systemd/system/getty@.service /etc/systemd/system/getty.target.wants/getty@tty1.service

Console Autologin

systemctl set-default multi-user.target
ln -fs /etc/systemd/system/autologin@.service /etc/systemd/system/getty.target.wants/getty@tty1.service

Desktop

systemctl set-default graphical.target
ln -fs /lib/systemd/system/getty@.service /etc/systemd/system/getty.target.wants/getty@tty1.service
sed /etc/lightdm/lightdm.conf -i -e "s/^autologin-user=pi/#autologin-user=/"

Desktop AutoLogin

systemctl set-default graphical.target
ln -fs /etc/systemd/system/autologin@.service /etc/systemd/system/getty.target.wants/getty@tty1.service
sed /etc/lightdm/lightdm.conf -i -e "s/^#autologin-user=.*/autologin-user=pi/"

 

Hope that helps someone.

BASH script to change the Security Keys and SALTs in a wp-config.php file

I wanted to automatically change the Security Keys/SALTS when provisioning a new WordPress site. WordPress.com has a service that spits back random values. (https://api.wordpress.org/secret-key/1.1/salt/). The script below CURLs the values and then modifies a wp-config.php file with the new random values.

SALTS=$(curl -s https://api.wordpress.org/secret-key/1.1/salt/)
while read -r SALT; do
SEARCH="define('$(echo "$SALT" | cut -d "'" -f 2)"
REPLACE=$(echo "$SALT" | cut -d "'" -f 4)
echo "... $SEARCH ... $SEARCH ..."
sed -i "/^$SEARCH/s/put your unique phrase here/$(echo $REPLACE | sed -e 's/\\/\\\\/g' -e 's/\//\\\//g' -e 's/&/\\\&/g')/" /Path/To/Your/wp-config.php
done <<< "$SALTS"

Don’t remember where I got the pieces of this, but here it is, I have been using it for a while and it seems to work well.
Hope that helps someone.

Installing WordPress via shell script(BASH)

We have been using a provisioning script that downloads the latest wordpress zip file, extracts into the right location it and sets up the DB connection. I wanted to take it a step further and eliminate the install.php page. The one that looks like this:Screen_Shot_2013-03-06_at_3.54.19_PM-2

 

So i sat down to figure out how to “Install WordPress” via shell script. Here is that command:

SITENAME="blog"
DOMAINNAME="company.com"
PASSWORD="MySecurePassword"
wp_install_result=$(php -r 'define("WP_SITEURL", "http://'$SITENAME.$DOMAINNAME'");define("WP_INSTALLING", true);require_once("./wp-load.php");require_once("wp-admin/includes/upgrade.php");$response=wp_install("TITLE", admin, "email@company.com", false, null, "'$PASSWORD'");echo $response;')

 
After WordPress is “installed”, we can now activate plugins.

Activating and deactivating WordPress plugins from a shell script (BASH)

I needed to update my WordPress site provisioning script to download, install and activate a WordPress plugin. The download is the easy part (I just use wget). But how do I activate the plugin. This is what I cam up with:

result=$(php -r 'require_once("./wp-load.php");require_once("wp-admin/includes/admin.php");activate_plugin("hello.php");')

And to be complete, to deactivate:

result=$(php -r 'require_once("./wp-load.php");require_once("wp-admin/includes/admin.php");deactivate_plugins("hello.php");')

Using cURL, BASH and Google oAuth to access Google Analytics

In this previous post, I used cURL (the command line version) to interact with Google Analytics. I wanted to do the same thing but using oAuth. I took a lot from this page, but there were a few things that I couldn’t get working, and a few things I didn’t know.

Follow Steps 1-6 on this page. These are steps that you need to follow to get your app registered with Google

In step 6, copy down the code, and keep track of it. It needs to be reused every time you need to get a new token. If you loose it, then you need to run step 6 over again. I didn’t know that.

Here is my script. I will jump through the code below it.

#!/bin/bash
CODE="4/v6xr77ewYqhvHSyW6UJ1w7jKwAzu&amp"
CLEINTID="1234567890.apps.googleusercontent.com"
HEADER="Content-Type: application/x-www-form-urlencoded"
CLIENTSECRET="aBcDeFgHiJkLmNoPqRsTuVwXyZ"
REDIRECTURI="urn:ietf:wg:oauth:2.0:oob"

# I keep the ACCESS_TOKEN and the REFRESH_TOKEN in a file.
if [ -s ~/.google ];then
	ACCESS_TOKEN=$(cat ~/.gauth | grep access_token | awk -F"," '{print $2}' | tr -d ' ')
	REFRESH_TOKEN=$(cat ~/.gauth | grep refresh_token | awk -F"," '{print $2}' | tr -d ' ')
else
	# not used before
	NEWTOKEN=$(curl -s -d "code=$CODE&amp;redirect_uri=$REDIRECTURI&amp;client_id=$CLEINTID&amp;scope=&amp;client_secret=$CLIENTSECRET&amp;grant_type=authorization_code" https://accounts.google.com/o/oauth2/token)
	ACCESS_TOKEN=$(echo $NEWTOKEN | awk -F"," '{print $1}' | awk -F":" '{print $2}' | sed s/\"//g | tr -d ' ')
	REFRESH_TOKEN=$(echo $NEWTOKEN | awk -F"," '{print $4}' | awk -F":" '{print $2}' | sed s/\"//g | sed s/}// | tr -d ' ')
	echo access_token , $ACCESS_TOKEN &gt; .google
	echo refresh_token , $REFRESH_TOKEN &gt;&gt; .google
fi
EXPIRED=$(curl -s https://www.googleapis.com/oauth2/v1/tokeninfo?access_token=$ACCESS_TOKEN | grep 'invalid_token')
if [ "$EXPIRED" ]       
then
	echo "EXPIRED"
	REFRESHRETURN=$(curl -s -d "client_secret=$CLIENTSECRET&amp;grant_type=refresh_token&amp;refresh_token=$REFRESH_TOKEN&amp;client_id=$CLEINTID" https://accounts.google.com/o/oauth2/token)
	ACCESS_TOKEN=$(echo $REFRESHRETURN | awk -F"," '{print $1}' | awk -F":" '{print $2}' | sed s/\"//g | tr -d ' ')
	echo access_token , $ACCESS_TOKEN &gt; .gauth
	echo refresh_token , $REFRESH_TOKEN &gt;&gt; .gauth
fi 
AUTH=$ACCESS_TOKEN
# now in your curl code to retrieve the google analytics data, you use --header "Authorization: OAuth $AUTH"

Lines 1-6: I am setting up my variables with data as described in the linked post.
Lines 8-11: I keep track of the current access token and the refresh token in a config file. If the file exists then parse out the values
Lines 12-19: This is the first time this has been run, so I need to create the file, and put in it a new token and the refresh token. Note the refresh token needs to be saved, and is only given to you once. I did not know that.
Line 20: checks to see if the access token is expired.
Lines 21-28: if the access token is expired, use the refresh token to get a new access token and then save it to the file.

That is it. I hope to translate into PowerShell next – I am sure this code exists, but this is how I learn.

Hope this helps someone.

BASH, cURL script to retrieve Google Analytics data

Last week I wrote this PowerShell code to retrieve Google Analytics data. Below is similar code in BASH using the cURL command.

#!/bin/bash
stty -echo
read -p "Password: " password; echo
stty echo
RESULT=$(curl -s https://www.google.com/accounts/ClientLogin \
--data-urlencode Email=email@company.com --data-urlencode Passwd=$password \
-d accountType=GOOGLE \
-d source=YourSource \
-d service=analytics)


AUTH=$(echo "$RESULT" | grep 'Auth=' | sed  s/Auth=//)

curl -s "https://www.google.com/analytics/feeds/data?ids=ga%3AXXXXXXXX&metrics=ga%3Avisits&start-date=2012-05-01&end-date=2012-05-31&max-results=50" \
--request GET --header "Authorization: GoogleLogin auth=$AUTH"

#Done

Update DynDNS from the command line

My router is not updating DynDNS correctly, so I wanted to use a simple cron job to do the same. Here is a simple BASH/Shell script to update DynDNS:

IP=$(curl -s icanhazip.com)
curl -v -k -u username:password “https://members.dyndns.org/nic/update?hostname=DNSHOSTNAME.dyndns.org&myip=$IP”

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