You can also use the grep command to find an exact match by using the beginning(^) and ending($) character. As you can see, the above command is unable to print all lines that contain the word “webservertalk“. That means this command does not work if you want to find the whole word in the middle of the line.
How do I grep a specific string in Linux?
Searching for Patterns With grep
- To search for a particular character string in a file, use the grep command. …
- grep is case sensitive; that is, you must match the pattern with respect to uppercase and lowercase letters:
- Note that grep failed in the first try because none of the entries began with a lowercase a.
How do you grep an exact string?
To Show Lines That Exactly Match a Search String
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. If there are any other words or characters in the same line, the grep does not include it in the search results.
How do you grep an exact word in Unix?
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 you match exact strings?
These are usually used to detect the beginning and the end of a line. However this may be the correct way in this case. But if you wish to match an exact word the more elegant way is to use ‘b’. In this case following pattern will match the exact phrase’123456′.
What is PS EF command in Linux?
This command is used to find the PID (Process ID, Unique number of the process) of the process. Each process will have the unique number which is called as PID of the process.
What is grep in Linux command?
You use the grep command within a Linux or Unix-based system to perform text searches for a defined criteria of words or strings. grep stands for Globally search for a Regular Expression and Print it out.
How do you grep special characters?
To match a character that is special to grep –E, put a backslash ( ) in front of the character. It is usually simpler to use grep –F when you don’t need special pattern matching.
How do I use find in Linux?
Basic Examples
- find . – name thisfile.txt. If you need to know how to find a file in Linux called thisfile. …
- find /home -name *.jpg. Look for all . jpg files in the /home and directories below it.
- find . – type f -empty. Look for an empty file inside the current directory.
- find /home -user randomperson-mtime 6 -iname “.db”
How do you grep two strings at once?
How do I grep for multiple patterns?
- Use single quotes in the pattern: grep ‘pattern*’ file1 file2.
- Next use extended regular expressions: egrep ‘pattern1|pattern2’ *. py.
- Finally, try on older Unix shells/oses: grep -e pattern1 -e pattern2 *. pl.
- Another option to grep two strings: grep ‘word1|word2’ input.
How do I grep a file in Linux?
How to use the grep command in Linux
- Grep Command Syntax: grep [options] PATTERN [FILE…] …
- Examples of using ‘grep’
- grep foo /file/name. …
- grep -i “foo” /file/name. …
- grep ‘error 123’ /file/name. …
- grep -r “192.168.1.5” /etc/ …
- grep -w “foo” /file/name. …
- egrep -w ‘word1|word2’ /file/name.
How do you grep one word?
Extract single word using grep
- UUID: a062832a; UID: Z6IxbK9; UUID: null; ……
- UUID: a062832a; UID: Z6IxbK9; ……
- UID: Z6IxbK9; UUID: null; ……