grep range

1. How do you grep a range of numbers?
2. How do I limit grep results?
3. How do you grep with multiple conditions?
4. How do I grep last 10 lines in Linux?
5. How do I grep a time range in Linux?
6. How do I grep a date range in Linux?
7. How do you grep the first 10 lines?
8. What does grep do in Linux?
9. What is grep equivalent in Windows?
10. How do I combine two grep commands?
11. How do I grep multiple words?
12. What patterns does grep let you use?

How do you grep a range of numbers?

(1[0-9]|20)" . Your regular expression in grep asks for 1 or 2, and 2 or 0. 1[0-9] will match anything between 10 to 19 as well as 20.

How do I limit grep results?

Limit grep Output to a Fixed Number of Lines

Limit the number of lines in the grep output by adding the -m option and a number to the command. In this case, the terminal prints the first two matches it finds in the sample file.

How do you grep with multiple conditions?

How do I grep for multiple patterns?

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 grep last 10 lines in Linux?

The tail command displays, by default, the last 10 lines of a text file in Linux. This command can be very useful when examining recent activity in log files. In the picture above you can see that the last 10 lines of the /var/log/messages file were displayed. Another option that you will find handy is the -f option.

How do I grep a time range in Linux?

The egrep pattern contains three parts. The first part grabs everything from 00:00:00 to 09:59:59. The second part grabs everything from 10:00:00 to 16:59:59, and the third part grabs 17:00:00. will return all logs lines between 16:35 and 16:39 on 01/Apr/2014.

How do I grep a date range in Linux?

You could do it in steps. Find the number of the first line matching your starting pattern. Find the number of the last line matching your ending pattern. Then extract the test between these two lines.

How do you grep the first 10 lines?

head -n10 filename | grep ... head will output the first 10 lines (using the -n option), and then you can pipe that output to grep . You can use the following line: head -n 10 /path/to/file | grep [...]

What does grep do in Linux?

What Is grep? Grep is a command-line tool that allows you to find a string in a file or stream. It can be used with a regular expression to be more flexible at finding strings.

What is grep equivalent in Windows?

The findstr command is a Windows grep equivalent in a Windows command-line prompt (CMD). In a Windows PowerShell the alternative for grep is the Select-String command.

How do I combine two grep commands?

Use a single arrow the first time and double arrows subsequent times to append to the file. The first two grep commands print just the line with the match and the last one prints the line and one line after.

How do I grep multiple words?

The basic grep syntax when searching multiple patterns in a file includes using the grep command followed by strings and the name of the file or its path. The patterns need to be enclosed using single quotes and separated by the pipe symbol. Use the backslash before pipe | for regular expressions.

What patterns does grep let you use?

GNU grep supports three regular expression syntaxes, Basic, Extended, and Perl-compatible. In its simplest form, when no regular expression type is given, grep interpret search patterns as basic regular expressions. To interpret the pattern as an extended regular expression, use the -E ( or --extended-regexp ) option.