How to grep for multiple matches?

The simplest way to search for multiple strings using grep is by employing the -e option. This option allows you to specify multiple patterns to search for in a single command.

How to grep last 100 lines?

Showing all lines after the grep result

1. tail -n displays the last N lines of a file.
2. wc -l returns the number of lines of the specified file.
3. tr -d ' ' removes space characters from the string returned by wc.
4. cut -d ':' -f 1 returns the line number of the pattern matched by grep.

How to find a flag using grep?

The four most commonly used flags to grep are -i (case-insensitive search), -l (list only the names of matching files), -w (which matches whole words only), and -v (invert; this lists only the lines that do not match the pattern). Another less well-known flag that is rather useful is -e.

How to use asterisk in grep?

When an asterisk ( * ) follows a character, grep interprets it as "zero or more instances of that character." When the asterisk follows a regular expression, grep interprets it as "zero or more instances of characters matching the pattern." You may want to try this to see what happens otherwise.

У Linux і Unix Systems Grep, шорти для “глобального регулярного expresion print”, is a command used в searching and matching text files містить в the regular …
grep — утиліта інтерфейсу командного рядка, яка знаходить на вводі рядки, що відповідають заданому регулярному виразу, і виводить їх.
grep надзвичайно потужний для пошуку, фільтрації та зіставлення шаблонів в Linux. Ось базовий синтаксис: grep [options] pattern [files].