Search Contents Inside A File Using Grep

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Search contents inside a file using grep.

The grep command, ( global regular expression print ), is one of the most versatile commands in a Linux terminal environment. It is a tool primarily used to search text or search any given file for lines containing a match to the supplied words/strings, like an e-mail or textbased file sent to a VAN's system.

Search contents inside a file using grep.

It is useful when/if working as support, when a customer sends in a file and wants a conformation that it was received and processed by the system.

Basic commands:

  • grep 'word' filename
  • grep 'word' file1 file2 file3
  • grep 'string1 string2'  filename
  • cat otherfile | grep 'something'
  • command | grep 'something'
  • command option1 | grep 'data'
  • grep --color 'data' fileName
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