You can also use grep to find multiple words or strings. You can specify multiple patterns by using the -e switch. Let’s try searching a text document for two different strings: $ grep -e 'Class 1' -e Todd Students.txt Notice that we only needed to use quotes around the strings tha...
The Linux grep command for multiple patterns or strings is covered in this article. First, we created three files with the names “file.txt”, “linux.txt”, and “name.txt” on our operating system, each of which contains various strings or patterns. Before using the third command on “...
REGULAR EXPRESSIONS A regular expression is a pattern that describes a set of strings. Regular expressions are constructed analogously to arithmetic expressions, by using various operators to combine smaller expressions. grep understands three different versions of regular expression syntax: “basic” (...
The syntax of the command is simple, and it can be used in various ways to search for different types of strings. One of the most useful features of the command is its ability to perform case-insensitive searches. Searching for a string in a file: grep “string” filename Suppose we ha...
1) how do I pass in two strings? This is what I am using now: ps -ef |egrep -i "programname|<defunct>" But this returns multiple results with the word defunct in them. 2) How do I make it so that... 10. Shell Programming and Scripting Grep strings for different cases Hi ...
Examples of Using Grep for Multiple Strings, Patterns and Words To make sure you understand how to use grep to search multiple strings, we suggestcreating a filewith some text on which we are going to try out a couple of different use cases. ...
-c, --count Suppress normal output; insteadprint a countof matching lines for each input file. With the-v, --invert-matchoption (see below), count non-matching lines. (-c is specified by POSIX.) --color[=WHEN], --colour[=WHEN] Surround(围绕) the matched (non-empty) strings, matchi...
A NULL value for the ERE matches every line. Note: The grep command with the -E flag is the same as the egrep command, except that error and usage messages are different and the -s flag functions differently. 拓展命令 编辑 egrep 命令,搜索文件获得模式。 egrep 命令会在输入文件(缺省值为...
Named after the qed/ed editor subcommand "g/re/p", where re stands for a regular expression, to Globally search for the Regular Expression and Print the lines containing matches to it. There are two other variants, fgrep which searches only for fixed strings and egrep which accepts extended...
Checking for strings in multiple files. There will be quite some results in the following query so please scroll to see all of them. We will use the “*” symbol for grep to understand we mean expansion: $ grep "address" /etc/* … grep: /etc/sudoers.d: Is a directory /etc/sudo_...