grep is a command-line tool for searching text patterns in files

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grep only matching word

I have a temp file, and I want to grep the only word that matches the pattern instead of whole word. i tried grep -o <pattern> file but its not giving me desired output Input xi29 vddf vss ...
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2answers
119 views

Filter Large Data Sets on Dates with Command Line

I have a huge data sets that consists of tab separated values that are stored in rows. An example row looks like this: Dec 4 14:37:36.381651 algorc1 [27751:l@27932]/error: [] - [T0000A124M5] ...
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2answers
177 views

Print repeating pattern

I have a marathon file from which I want to print the names of the runners, who have made multiple runs. Something like: M, 2:08:58.0, John Lukas, USA, 1997-07-25, Paris, France F, 2:15:04:0, Abebbe ...
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2answers
59 views

Extracting list of patterns which are output of another command

I can extract list of patterns using following command, fgrep -A 1 -f patternlist.txt filename.fasta but, is there a way I can extract without creating another file (patternlist.txt in this case) ...
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1answer
66 views

How to find strings using regular expressions in grep

So I have a file list with list of the people in a company. Each line contains Position(a short string), years, name(first and last), salary and nationality(three capital letters). They are divided ...
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2answers
202 views

grep for repeated values from pattern list

I have file A.txt which is a lists of unique ids (column 1) and its corresponding values(column 2): A.txt ABC1D_T1_B1 123.4 ABC2D_T1_B2 146.7 ABC3D_T1_B1 567.8 ABC4D_T0_B2 96.8 ABC1D_T0_B1 ...
4
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7answers
494 views

Grep for a line containing only 5 or 6 numbers

How would you grep for a line containing only 5 or 6 numbers? Something like this. case 1 (has leading space) 10 2 12 1 13 case 2 (no leading space) 1 ...
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1answer
44 views

combining grep ignore and matches

I would like to grep a file to find all instances of the text fn1 that don't have the word call in front of it and print out four lines before and after the matches (even if the surrounding lines have ...
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2answers
255 views

How to grep for same string but multiple files at the same time?

I have a set of log files that I need to review and I would like to search specific strings on the same files at once Is this possible? Currently I am using grep -E ...
0
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1answer
116 views

grep for specific process in ps but not the grep command itself [duplicate]

If I want to check if something is running, I do ps aux | grep flamethrower, expecting just to show the processes containing flamethrower in the name. This will always find at least one process, as ...
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2answers
82 views

problem with grep -f list of pattern

After searching, reading and trying possible solutions for much about grep lines with the list of patterns, hence I am writing. It is I know a very basic and have been attended in many forums. But I ...
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1answer
47 views

Get commands a user can run from /etc/sudoers?

I need a shell (ksh) script that can be executed locally on a box that will return a list of users who have sudo access to a server and what commands they can run. For example I want to know that ...
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2answers
41 views

How to limit the number of search results per directory

How to limit the number of search results per folder, for example: With this command: grep --include=*.php -Ril '<?' '/var/www/' I get the following: /var/www/test.php /var/www/test1.php ...
0
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2answers
165 views

list of selectable units for journalctl

In a CentOS 7 server, I want to get the list of selectable units for which journalctl can produce logs. How can I change the following code to accomplish this? journalctl --output=json-pretty | ...
3
votes
1answer
132 views

grep fixed string at end of line

I need to grep for string containing special characters and make sure it is at the end of the line For example, in list: abc defg[h]ij I want to grep for defg[h]ij$ xyz 123*456 I want to grep for ...
0
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1answer
50 views

Issue finding lines using grep in UNIX [closed]

I am trying to use a .txt file with around 5000 patterns (spaced with a line) to search through another file of 18000 lines for any matches. So far I've tried every form of grep and awk I can find on ...
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3answers
48 views

How to pick out files in a folder in which the header contains specific text?

Use case: Let's say there is a folder full of large RDF+XML files and they follow different namespaces. We want to find those files that follow a given namespace (for example ...
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5answers
75 views

grep words around a token

I have some lines in a file like: This is one word1:word2 of the lines This is another word3:word4 of the lines Line without a match Yet another line word5:word6 for test I need to grep ...
0
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1answer
56 views

No output from grep -P 'com\K\w+'

I have a source file saved off the internet which has various links I want to pull data from. For example https://blahblah.com/uniquetext I'm using grep -oP 'com\K\w+' source.txt > list.txt ...
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2answers
568 views

grep pattern exacly matching from file and search only in first column

I have a bigfile like this: denovo1 xxx yyyy oggugu ddddd denovo11 ggg hhhh bbbb gggg denovo22 hhhh yyyy kkkk iiii denovo2 yyyyy rrrr fffff jjjj denovo33 hhh yyy eeeee fffff then my pattern file ...
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2answers
430 views

How to grep for something that's in an environment variable and has a forward slash?

I want to grep a file, and I want to get all the lines that have a certain environment variable (to be exact, $PWD). Of course, using just cat file | grep '/'$PWD'/' is not working, since $PWD ...
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2answers
63 views

Read file and find all occurances and generate hash for the content in between the occurance

I have a file like this : 1 Record|1111|ABC 2 text in between for record 1 3 text in between for record 1 4 Record|2222|XYZ 5 text in between for record 2 6 Record|3333|XYZ 7 text ...
6
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2answers
545 views

Suppress 'file truncated' messages when using tail

I'm tailing a log file using tail -f messages.log and this is part of the output: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce eget tellus sit amet odio porttitor rhoncus. Donec ...
2
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1answer
73 views

How do I grep for multiple patterns on multiple lines?

To be precise Some text begin Some text goes here. end Some more text and I want to extract entire block that starts from "begin" till "end" with awk we can do like awk '/begin/,/end/' text ...
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2answers
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Zero input_file_names in Grep

From the manual for grep, the general form of grep usage is: grep options pattern input_file_names In particular, it is stated "There can be zero or more input file names." What files are ...
2
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7answers
579 views

Formatting the output of grep when matching on multiple files

When searching on multiple files, the output of grep looks something like this: {FILE}:{MATCH} This is a problem since if I double-click on the {FILE} portion, I will at least also select (and ...
0
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1answer
36 views

How do I add text to an output file?

I have a script for doing whois lookups: #!/bin/bash for domain in `cat /Users/jason/Desktop/letters.txt `; do echo $domain >> /Users/jason/Desktop/whois-results.txt whois $domain | grep ...
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0answers
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Review GREP and FIND results in Xemacs

I spend a lot of time searching code. I really like grep and find, because of all the options available. But it takes way too long to navigate the results. I use xemacs and it takes 3 more commands ...
0
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2answers
72 views

Grep matching cell of the csv file and index of that row

I have csv file and I want to see numbers that start with 0.99 and their row's index which is the first cell of that row. This is what I have so far: cat fil.csv | grep '0\\.99'| tee > (cut -d, ...
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3answers
164 views

Grep for searching pattern in a file

I want to use grep to search pattern from one file in a second one. My pattern file is something like: K02217 K07448 KO8980 The file to search in is: >aai:AARI_24510 proP; proline/betaine ...
6
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1answer
209 views

Conditional grep without quiet option

I always thought the quiet (-q) option had to be used when using grep conditionally. But re-reading the man page it seems like it should work without it. So if you want to print matches and use it in ...
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2answers
83 views

Unix grep confusion

I am doing an assignment for school and using putty to complete the assignment. The format of the assignment does not allow for much variation and thus only one answer is sufficient enough to allow me ...
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2answers
82 views

Seaching a File in Unix for a given string and then another set of Strings within this file and print file properties too

I am using command to search for files staring from a given Directory in Unix , files ending *.sas and containing the string DB2. I then inturn want to search the resultant set of files for the ...
2
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1answer
56 views

Help with using quotes in grep searches

I have a file with variables in it of the form a(i)%b(j)%c where the a, b, and c are always the same, but the indices i and j may be different (including multiple characters). So I've played around ...
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3answers
143 views

Print total free memory from `free -m`

free -m currently puts out something like this. I would like to know using grep/awk how we can get the total free amount. i.e. 9083
0
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3answers
138 views

Simple way to extract value from HTML

I have a very simple html file with a value inside. Value is 57 in this case. <eta version="1.0"><value uri="/user/var/48/10391/0/0/12528" strValue="57" unit="%" decPlaces="0" ...
2
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1answer
99 views

egrep multiple patterns with dashes

I am trying to match the followings with egrep '201411[08|09|10|11]-[117|111]-' 20141108-111-xyz-abc 20141110-117-342-lala But for some reasons, the 2nd character class pattern ([117|111]) doesn't ...
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2answers
133 views

Search 2nd line of files and print filenames to stdout

I have a few directories of ~10,000 files. What's the quickest way to search each file and return the filename if the second line contains a specific string? Edited for clarity
1
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2answers
177 views

find field pattern in a csv file then count unique field values

I am using Cygwin (bash) to create a script to find, group and count fields in multiple CSV files. Each row will have comma-separated fields with each field following a similar convention. There is a ...
3
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3answers
451 views

How can I delete all text between curly brackets in a multiline text file?

Example: This is { the multiline text file } that wants { to be changed } anyway. Should become: This is that wants anyway. I have found some similar threads in the forum, but they don't seem ...
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1answer
49 views

Information about grep cammand [closed]

Both two outputs came in my terminal. sda 13.45 479.55 84.92 812139 143808 sda 5.00 4.90 4.00 13 24 I want to get ...
3
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1answer
97 views

How to format grep results?

Wow, I could not think of a good way to title this question. Basically I have a file called "attendance" with data like this: 11/06/2014 101.11.001.01 FirstName LastName 11/06/2014 101.11.001.01 ...
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5answers
103 views

Regular Expression for Mixed cased words

I want a regular expression that will help me identify if a certain pattern is present as a mixed case in a sentence or not. Say: Fox juMPed the rock Now, I want to find that if the pattern ...
2
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6answers
99 views

Getting the matched word exactly

I have looked through a number of question but they do not satisfactorily reply to my question. I need to print words that match the pattern exactly not the lines containing that word. For example: ...
4
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1answer
145 views

what is grep -v -f /dev/null expected to do exactly?

Theory: grep -f somefile or grep --file=somefile will find all lines that match one of the patterns listed in somefile. If somefile is empty, nothing will match. With grep -v you list lines that do ...
2
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1answer
90 views

grep of a shell variable finds nothing

I have some problem with grep. I wrote a script which need to find some numbers from a list (file name ContigsNames) in a database. I wrote the following script: file=ContigsNames while IFS=' ' read ...
2
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3answers
50 views

Removing lines from one file based on non-existence in another

I need to remove lines from fileA which has two columns if fileB (one column only) does not contain the string from column1 in fileA. Any linux command would help. Thanks. Example. Here is fileA: a ...
0
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1answer
19 views

add fields from different lines in one line

I'm trying to add the .data and .bss sections of the size -A output size -A mylib.so | grep "\.data" | awk '{print $2} this will print the value of the size of the .data section. I guess I could ...
0
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3answers
87 views

How do I search a file for a string then use it as a variable?

I have an XML file that looks like this: <id>456</id> <root> <value>1</value> <intNum>2</intNum> </root> <root> <eulav>1</eulav> ...
3
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3answers
72 views

How can I base the file name off of an already existing variable?

I'm using this to delete lines that don't match a pattern: $ egrep "pattern1|pattern2|pattern3|pattern4|pattern5" But now I need to do it automatically, so I'm setting a variable like this: $ ...