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Many times I prefer to just work from the shell. The ~/.bashrc file is a great place to put functions if you are using them regularly.
Let’s build a cool command line currency converter using google’s currency converter. You might require wget or curl and sed to do this.
Just run the following command in terminal.
wget -qO- "http://www.google.com/finance/converter?a=1&from=usd&to=inr&hl=es" | sed '/res/!d;s/<[^>]*>//g';
This will convert 1 USD to INR (Indian Rupee).
Output:
1 USD = 45.4950 INR
What we are doing is, query google using wget and parse the output using sed.
You can use curl as well:
curl -s "http://www.google.com/finance/converter?a=1&from=usd&to=inr&hl=es" | sed '/res/!d;s/<[^>]*>//g';
Isn’t that a long command. Lets create a cool bash function for the ease use:
Open you ~/.bashrc file in your favorite text editor and add the following lines and save.
currency_convert() { wget -qO- "http://www.google.com/finance/converter?a=$1&from=$2&to=$3&hl=es" | sed '/res/!d;s/<[^>]*>//g'; }
Now Run:
$ currency_convert 10 usd inr 10 USD = 454.9500 INR
If you want to convert to more than one currencies at once, rewrite our function as bellow.
currency_convert() { for i in $3 do wget -qO- "http://www.google.com/finance/converter?a=$1&from=$2&to=$i&hl=es" | sed '/res/!d;s/<[^>]*>//g'; done }
Now run:
$ currency_convert 1 usd "inr gbp eur" 1 USD = 45.4950 INR 1 USD = 0.6603 GBP 1 USD = 0.7382 EUR
Happy currency converting 
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[...] rest is here: Command Line Currency Converter For Linux « Core Dump Posted in Uncategorized | Tags: entry, friday, linux, posted-on-friday, [...]
How about a script like the following:
#!/bin/bash
## http://www.google.com/finance/converter
AMOUNT=`zenity --width=250 --title='Currency Converter' --text='Please enter US dollar (USD) amount' --entry`
if [ "${AMOUNT}" == "" ]; then
zenity --error --text="Amount not defined by user.
Exiting. "
exit 1
fi
(echo "European Euro (EUR)"; wget -qO- "http://www.google.com/finance/converter?a="$AMOUNT"&from=usd&to=eur" | sed '/res/!d;s/]*>//g';
echo "Brazilian Real (BRL)"; wget -qO- "http://www.google.com/finance/converter?a="$AMOUNT"&from=usd&to=brl" | sed '/res/!d;s/]*>//g';
echo "Mexican Peso (MXN)"; wget -qO- "http://www.google.com/finance/converter?a="$AMOUNT"&from=usd&to=mxn" | sed '/res/!d;s/]*>//g';
echo "Argentine Peso (ARS)"; wget -qO- "http://www.google.com/finance/converter?a="$AMOUNT"&from=usd&to=ars" | sed '/res/!d;s/]*>//g';) | zenity --width=300 --height=300 --text-info --title "Converted Currency"
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I’d rather just go to the web page
[...] Command Line Currency Converter For Linux [...]
[...] Command Line Currency Converter For Linux [...]
[...] Command Line Currency Converter For Linux « Core Dump [...]