Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Debug and verify Postfix configurations
Answer:
A simple way to debug and verify your Postfix configurations is the use the sendmail command with the -bv flag.
Example:
# sendmail -bv [email protected]
No email will be sent using the above command, it just report after verifying each recipient address. This is very useful for testing the Postfix configurations.
Install Google Chrome in Ubuntu
Answer:
To install Google Chrome in Ubuntu, the simplest way is to us PPA
E.g.
1. Add the key and URL
# wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
# sudo sh -c 'echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
2. Install it
# sudo apt-get update
# sudo apt-get install google-chrome-stableDone.
Download a complete directory on FTP server with wget
Answer:
You can try the command below in order to download all the files/sub-directories under the directory "dir"
# wget -r ftp://user:[email protected]/dir/*
Renew DHCP IP address in Ubuntu
Answer:
To rename an IP address using DHCP in Ubuntu, try enter the commands below:
1. Release the current IP
# sudo dhclient -r2. Renew a new IP
# sudo dhclientCreate Facebook Test Users
Answer:
In the last article, you already know how to get the Facebook access token. In this post, I will tell you how to create testing accounts for your app's testing.
# curl -F 'access_token=ACCESS_TOKEN' 'https://graph.facebook.com/APP_ID/accounts/test-users?installed=true&permissions=read_stream'
You can manipulate the permissions as needed.
