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

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3
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1answer
52 views

Show exact number of CRLF occurrences in file

grep -c $'\r\n' file returns the exact same number as grep -c $'\n' file, it shows the number of LF in the file instead of the number of CRLF. (The file definitely does not contain that number of ...
2
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2answers
43 views

Group matching with grep includes extra characters

I wanted to extract some text with regex in bash, so I decided to try the following simple example out. echo "abc def ghi" | grep -Po " \K(.*?) " I was expecting to get a "def", but to my surprise ...
12
votes
1answer
600 views

grep inside less?

I'm currently sifting through a lot of unfamiliar logs looking for some issues. The first file I look at is Events.log, and I get at least three pages in less which appear to display the same event ...
2
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1answer
64 views

counting occurrences of a string

I have a large database of this format: 0500506 gi|561108321|ref|NC_018143.2| 71446 0 0500506 gi|561108321|ref|NC_018143.2| 71447 0 0500508 gi|561108321|ref|NC_018143.2| 71449 0 0500509 ...
1
vote
1answer
53 views

Why recursive grep does not work with STDOUT? [closed]

I've been long used to have some custom aliases in my Ubuntu/Mint machines, like alias grep='grep -irn --color --line-buffered'. However, I've noticed that since a while ago this stopped working for ...
0
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1answer
53 views

Different usage of grep

I know grep can be use to do partial search, for example if i use echo "Enter example" read example echo "Enter Subject" read subject grep -i ^$example info.txt | grep -i ^[^,]*:$subject The ...
2
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5answers
310 views

grep files from list

I am trying to run grep against a list of a few hundred files: $ head -n 3 <(cat files.txt) admin.php ajax/accept.php ajax/add_note.php However, even though I am grepping for a string that I ...
1
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3answers
125 views

How do I make an output for grep fail?

I am using if-else statement to search for keywords and displaying the results in the terminal, here's an example of my code. read finding if ["$finding" != "" ]; then grep $finding ...
0
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0answers
29 views

egrep for specified strings and newline

I receive a prespecified list of strings. In a number of textfiles (example below), I want to search for strings, that do not start with one of the strings in the list. From time to time, a blank link ...
1
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3answers
156 views

Pattern Search between specific lines and print line numbers

I have a file of 20 lines. I want to search for a string between the lines 10 and 15 and print the string along with the line numbers of the original file. I have tried sed -n 10,15p file | grep -n ...
6
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5answers
384 views

grep skip n lines of file and only search after

I have a huge log file and want to grep the first occurrence of a pattern, and then find another pattern right after this occurence. For example: 123 XXY 214 ABC 182 558 ABC 856 ABC In my example, ...
0
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2answers
203 views

Using grep for listing certain lines from a file

Using a random file, such as /usr/share/vim/vim74/tutor/tutor, is there a way to list all lines that start with a 5 letter word ? How about the lines that end with a 5 letter word ? I've been ...
2
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1answer
27 views

How do I make grep list the count of matches before the filename?

grep -cZ has the weird behaviour that, while filenames are nul-terminated, the count of matches appears after the corresponding filename. Via od -c: 0000000 / u s r / i n c l u ...
-2
votes
1answer
97 views

How to use Cut and Grep command to find data separated by “:” [duplicate]

In my simple database, it contains text of like, example, soldiers. Name:Rank:Gender:Age:Years of Service Tom Corporal:Recruit:Male:19:2 Nicole Sergeant:Corporal:Female:30:10 Daniel ...
0
votes
1answer
92 views

How to use grep and cut together?

Lets say I'm doing a database for fruits. Using a text file for it, inside contains, in this format, (Fruit:Quantity:Cost) Apple:10:1 Orange:20:2 Pears:10:3 Banana:20:4 10 Apples at $1 each. 20 ...
1
vote
1answer
61 views

How can I teach grep to treat properties-files like text-files

Since I upgraded grep from 2.16 to 2.21 it treats .properties-files like binary files. This sucks because I like to use grep -I ... to exclude binary files from the search results and ...
1
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2answers
52 views

find and replace a value in a line of text

I have a text file which contain only 1 line of text 1314:Battery:1.90:50:30 I'm trying to figure out if is there anyway to do a grep and sed to change the value 50 and 30 to the following ...
3
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2answers
120 views

Select lines starting with specific numbers

I have to show the PID, PPID and STATUS of the procceses on the system, but only the ones which PID starts with numbers in the range 5-8. So i tried something like this... ps xao pid,ppid,s | grep ' ...
0
votes
1answer
33 views

Why the grep result depends on folder path? [duplicate]

I meet a strange phenomenom when using grep on Solaris 10: I try to use grep to find creat related DTrace probes. When in a folder (/data1/nan), it works OK: bash-3.2# pwd /data1/nan bash-3.2# ...
0
votes
2answers
42 views

extracting lines from a large text file

I have a text file with data that looks like this (1875 lines to be exact) chr1 MOTEVOC_cage_181208 TF_binding_site_cage_181208 6585538 6585547 0.905022147 - . TF_binding_site_cage_181208 ...
3
votes
3answers
84 views

extract from line to line and then save to separate file

I tried my luck with grep and sed but somehow I don't manage to get it right. I have a log file which is about 8 GB in size. I need to analyze a 15 minute time period of suspicious activity. I ...
1
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1answer
83 views

grep stopped working [closed]

This is a weird question. I was using the normal grep -w command to search through millions of lines to extract specific lines that contained the word that I was interested in. grep -w Search_word ...
1
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2answers
66 views

How to make a filter more efficient

I've created a script to compare a list of users from a MSSQL database against a list of disabled AD users. The tool we use for AD authentication returns data in the following format (with plenty ...
4
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4answers
372 views

grep with logic operators

Is there a grep-like utility that will enable me to do grep searches with logic operators. I want to be able to nest and combine the logical constructs freely. For example, stuff like this should be ...
1
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1answer
20 views

output neighbouring lines with line numbers while grepping

Is there a way to output the neighbouring lines along with the line numbers while grepping the contents of a file? I'm trying to get outputs of the form: $ ~/myscript.sh download file # 'download' ...
5
votes
3answers
169 views

grep for multiple regexes, and count the number of occurences

Say, I have a file, and multiple regexes have to be searched in it and the number of matches for each regex has to be counted. Thus, I cannot combine the patterns: grep -Po ...
4
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6answers
685 views

grep invading my ps [duplicate]

When I'm checking for some process, I usually write ps aux | grep myprocess And sometimes I get the output of eimantas 11998 0.0 0.0 8816 740 pts/0 S+ 07:45 0:00 grep myprocess if ...
6
votes
4answers
174 views

How to grep netcat output

I'm trying to grep live text stream from netcat, but it doesn't work for me: netcat localhost 9090 | grep sender returns nothing, but I'm sure that it should. If I redirect the netcat output to a ...
2
votes
1answer
91 views

Why is the end-of-line $ anchor not working with the grep command, even though the front-of-line ^ anchor is?

Very new to UNIX but not new to programming. Using Terminal on MacBook. For the purposes of managing and searching word lists for crossword construction, I'm trying to get handy with the Grep command ...
1
vote
3answers
65 views

Grep lines that cotain “1111-11-11” or “2382-21-20”. (Any Numbers)

I have tried to do this and I came up with this grep -E '\<[0-9]{4}"-"[0-9]{2}"-"[0-9]{2}\>' It doesn't work and the reason for that is the "-" and multiple grep things, so I tried dividing ...
4
votes
2answers
107 views

Error getting the string between two patterns

I want to get a string between two patterns. The pattern is the first environment <p> </p> in an html file. <p>Sorcery, R (1) </p> <p ...
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votes
2answers
25 views

OSX bash. grep for string “--version=”

How can I search for string --version= using grep in OSX bash? When I try something like this: grep -rI --exclude-dir=out "--version=" . I get grep: option `--version' doesn't allow an argument ...
3
votes
2answers
73 views

Why can't I grep this command line option?

The output of man icc contains -Ldir Tells the linker to search for libraries... Doing man icc | grep "\-L" gives back the "-Ldir" line while man icc | grep "\-Ldir" does not. What am ...
2
votes
3answers
76 views

Execute command within variable

I'm trying to execute a command, stored within a variable: cmd="grep -i \"word1\" filename | grep -i \"word2\"" eval $cmd But when I execute the script I get the errors: grep: |: No such file or ...
1
vote
1answer
344 views

Invalid back reference using grep

So I am trying to find 6-letter words that consist of one character repeated three times followed by another character repeated three times. For example aaabbb or oookkk. I am trying: grep -E ...
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votes
3answers
79 views

How to list filenames within a folder based on a pattern supplied?

I'm trying to find a command that will list all files in a folder containing a keyword that is inputted. I've tried grep -l but it will not list anything
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4answers
95 views

How to ignore the lines starts with # using grep / awk

cat /etc/oratab #test1:/opt/oracle/app/oracle/product/11.2.0.4:N +ASM2:/grid/oracle/app/oracle/product/11.2.0.4:N # line added by Agent test2:/opt/oracle/app/oracle/product/11.2.0.4:N ...
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1answer
64 views

Help with Grep , uniq and sort

can anybody help me understand this expression grep -oP "TYPE=\w+" | sort | uniq -c
1
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1answer
33 views

In which directory is node running?

In trying to figure out how some application that listens on port 8088 is running, I see that it has PID 15020: $ netstat -ntulp Proto Recv-Q Send-Q Local Address Foreign Address ...
2
votes
1answer
102 views

How to count occurrences of all the words in all the files of a directory using grep? But with count incremented only once per word per file

I have already asked a similar question but people misunderstood what i was asking. I was asking how to generate a list of every word with a word count incremented only once per word per file. For ...
0
votes
2answers
161 views

How can I store each seperate entire line in a text file into an array?

I have a file called "threewords". It contains the information: \#gray speedy bee gr-A | sp-E-d-E | b-E \#gray greedy pea gr-A | gr-E-d-E | p-E When I run the command: cat threewords | grep ^# ...
0
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3answers
160 views

kill several processes using awk tools

I want to stop several processes using awk.My command is like this: sudo ps -ef|grep wget |grep -v grep|awk '{print $2;sudo kill -STOP $2}' I want to stop all processes which is running wget. $2 of ...
0
votes
2answers
58 views

Command to see if a word is in a list of files and output how many files it is in

There is a similar question to mine already but mine has a slight difference. I want to see how many files contain each word. When a file has a word then it increments the counter and then continues ...
1
vote
1answer
107 views

Counting the instances of specific words in a text, using awk [duplicate]

If I have a file words_of_interest.txt with one word per line, is there a way to use awk (or some other *nix tools) to obtain the number of times each of these words occurs in another text file ...
2
votes
1answer
40 views

comparing 2 lists with additional data to be printed

I have a file lets say file1.txt ENSG00000223116 AL157931.1 ENSG00000233440 HMGA1P6 ENSG00000207157 RNY3P4 ENSG00000229483 LINC00362 ENSG00000252952 RNU6-58P I have another file say ...
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2answers
26 views

Erasing in stdin all instances of regexes defined in a file

I am after something like a combination of sed 's/pattern//g' and grep -f patternfile.txt. Basically I would like the input stream to be stripped of all instances of the regex patterns defined in ...
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vote
3answers
182 views

Replace a string and replace it with a part of itself

I am cleaning up my data that is stored in text files. Each line starts with a category label followed by the actual data that I want to clean up. There are many text files in different subfolders, so ...
1
vote
5answers
120 views

How to get the unique count of a particular part of a string

I have a set of data in a file. psf7433-nlhrms unit7433-nobody unit7333-opera bpx7333-operations app7333-osm unit7330-partners psf7331-pdesmond unit7333-projm mnp7330-redirect unit7333-retailbanking ...
1
vote
1answer
38 views

vim :grep using the bash 'globstar' option

I am (slowly) switching to Vim for everyday Ruby on Rails coding (Linux Cinnamon 64bit). Being a newbie, I recently came across something I don't understand. I want to use the :vimgrep and :grep ...
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votes
3answers
308 views

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 ...