Search text in a file using grep command on a PuTTY terminal

$ grep "somestring" filename.log

grep 'word' filename

grep 'word' file1 file2 file3

grep 'string1 string2'  filename

cat otherfile | grep 'something'

command | grep 'something'

grep --color 'data' fileName

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FormData.delete() and FormData.set() do not support Internet Explorer

Problem: All methods of FormData do not work/compatible with Internet Explorer. The only method that is successful is 'append'. but suppose you want to override values of specific keys but in that scenarios 'set' and 'delete' methods will not work on Internet Explorer.

Solution: You may use below code that will work on IE.

var form = $('form')[0];
var formData = new FormData();

var inputs = form.getElementsByTagName('input'); //for input box

var inputsList = Array.prototype.slice.call(inputs);
inputsList.forEach(
  function (i) {
     if (i.name !== 'excludedName') {
          formData.append(i.name, i.value);
     }
   }
);
formData.append('excludedName', 'value you want to set');

Note: for 'select' and 'textarea' use: 
var selects = form.getElementsByTagName('select');
var textareas = form.getElementsByTagName('textarea');

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