We can use facebook even without an internet connection.A Singapore based mobile company called U2opia has introduced an application which provides this service through mobile.This world’s first USSD-based Facebook access service.It uses the technique called Unstructured supplementary data (USSD).We can use facebook from a mobile which does not have GPRS facility is the main speciality of this application.But all the features of facebook is not available through this application.We can on read friends posts,comments and can upload our status and comments.We need to send only a message.The company launched this service in India cooperation with Bharati Airtel.
Sometimes we need to ignore multiple lines with certain words and get the list out of the file. usually it will be a log file to read . The below grep command can be used to ignore multiple words present in a text file. Lets say the file contain $ cat list.txt apple orange apple banana papaya Now we need to ignore line with orange , banana and papaya . So we can use the below grep command. $ cat list.txt | grep -Ev "orange|banana|papaya" apple apple It will ignore lines with the words in -v part of grep.
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