$ grep -w 'fly\|session' recording_commands In the examples below, the line containing the word "session" is only included when the full word is used in the command. The command below fails to find the word "xray" because the "y" is omitted and the -w option is used. If you only want to find exact matches for your strings, use a command like the one below that will only display strings when they are included in the file as full words – not substrings.
$ grep -e ^xr -e tape -e hope -e boat 4letters
In this case, each string is included following its own -e. The same search can be performed using grep's -e option. The command will display any lines in the file that contain the word "xray", the word "tape" or both. In the command below, the '|' character serves as an "or" function. There are a number of ways to search for a group of strings in a single command. The wording suggests there was more to the story than anyone wanted to admit. This "find string in file" command will show all the lines in the file that contain the string, even when that string is only part of a longer one. The simplest grep command looks like the one shown below.
GREP REGEX ONE OF TWO STRINGS HOW TO
This post shows how to use grep in all these ways. It can also ignore case when needed, and it can count the lines in the resulting output for you. It can be used to search through these files for multiple strings or regular expressions at the same time. The grep command makes it easy to find strings in text files on Linux systems, but that's just a start.
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