What is egrep?

egrep is a pattern searching command which belongs to the family of grep functions. It treats the pattern as an extended regular expression and prints out the lines that match the pattern. If there are several files with the matching pattern, it also displays the file names for each line.

How do you use egrep in Linux?

The egrep command belongs to the family of the grep command which is used for pattern searching in Linux. If you have used the grep command, egrep works the same as grep -E (grep Extended regex’) does. Egrep scans a specific file, line to line, and prints the line(s) that contain the search string/regular expression.

Is egrep same as grep?

grep and egrep does the same function, but the way they interpret the pattern is the only difference. Grep stands for “Global Regular Expressions Print”, were as Egrep for “Extended Global Regular Expressions Print”. The grep command will check whether there is any file with .

What is the difference between egrep and Fgrep?

egrep is the same as grep -E. fgrep is the same as grep -F. Direct invocation as either egrep or fgrep is deprecated, but is provided to allow historical applications that rely on them to run unmodified. You use fgrep or grep -F if you don’t want the grepped string to be interpreted as a pattern.

Is the egrep function the same as grep?

egrep is a pattern searching command which belongs to the family of grep functions. It works the same way as grep -E does. It treats the pattern as an extended regular expression and prints out the lines that match the pattern.

What’s the name of the egrep command in Linux?

Linux egrep command. On Unix-like operating systems, the egrep command searches for a text pattern, using extended regular expressions to perform the match. Running egrep is equivalent to running grep with the -E option. This page covers the GNU / Linux version of egrep.

How to search for a string in egrep?

If you want the results to display only the word “on” as a full word and not as a sub-string, you can use the -w flag with egrep. Syntax: $ egrep -w “search_string” filename. Example: Here I am searching for the string “on” in a sample file: $ egrep -i “on” samplefile.txt.

What does C and V do in egrep?

-c: Used to counts and prints the number of lines that matched the pattern and not the lines. -v: It prints the lines that does not match with the pattern. -i: Ignore the case of the pattern while matching.