How do you grep for an exact match?

How do you grep for an exact match?

To Show Lines That Exactly Match a Search String The grep command prints entire lines when it finds a match in a file. To print only those lines that completely match the search string, add the -x option. The output shows only the lines with the exact match.

How do you grep two strings at once?

The syntax is:

1. Use single quotes in the pattern: grep ‘pattern*’ file1 file2.
2. Next use extended regular expressions: egrep ‘pattern1|pattern2’ *. py.
3. Finally, try on older Unix shells/oses: grep -e pattern1 -e pattern2 *. pl.
4. Another option to grep two strings: grep ‘word1\|word2’ input.

How do I search for a specific string in a file in Linux?

If you have a file opened in nano and need to find a particular string, there’s no need to exit the file and use grep on it. Just press Ctrl + W on your keyboard, type the search string, and hit Enter .

How do you grep with wildcards?

1. grep itself doesn’t support wildcards on most platforms. You have to use egrep to use wildcards.
2. @PanCrit: * means the same thing in grep and egrep: it’s a quantifier meaning zero or more of the preceding atom. That’s a completely different concept than the wildcards used by the shell.
3. @AlanMoore Thanks for the update.

How do you grep an exact word in Linux?

The easiest of the two commands is to use grep’s -w option. This will find only lines that contain your target word as a complete word. Run the command “grep -w hub” against your target file and you will only see lines that contain the word “hub” as a complete word.

How do I search for a specific word in a file in Unix?

Using grep to Find a Specific Word in a File

1. grep -Rw ‘/path/to/search/’ -e ‘pattern’
2. grep –exclude=*.csv -Rw ‘/path/to/search’ -e ‘pattern’
3. grep –exclude-dir={dir1,dir2,*_old} -Rw ‘/path/to/search’ -e ‘pattern’
4. find . – name “*.php” -exec grep “pattern” {} \;

How do I search for a specific word in a grep file in Linux?

The grep command searches through the file, looking for matches to the pattern specified. To use it type grep , then the pattern we’re searching for and finally the name of the file (or files) we’re searching in. The output is the three lines in the file that contain the letters ‘not’.

How do you grep distinct?

Solution:

1. Using grep and head command. Pipe the output of grep command to head command to get the first line.
2. Using m option of grep command. The m option can be used to display the number of matching lines.
3. Using the sed command. We can also use the sed command to print unique occurrence of a pattern.
4. Using awk command.

How do I remove duplicate lines in Linux?

Linux Shell – How To Remove Duplicate Text Lines

1. sort command – Sort lines of text files in Linux and Unix-like systems.
2. uniq command – Rport or omit repeated lines on Linux or Unix.