0
votes
0answers
20 views

Multiple grep command and show after line

I have this command grep -iE -A18 "$(date +"%Y-%m-%d").*error" * | grep -v -A18 'Movig to Error Queue' but the result shows me the 18 line after 'Moving to Error Queue' but I do not want that. I ...
-1
votes
1answer
34 views

Find a sentence with regex linux

I want a good regex for find a sentence contains words and space in Linux ... I examine several regex but i failed ... i think its very simple but i cant now o it... also im very sleepy..... this is ...
0
votes
1answer
44 views

split a file by a line prefix

My data looks like this: 60 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 61 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 62 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 62 ...
0
votes
1answer
10 views

Extracting part of a large SQL dump

Is there a way to chain commands like grep and head together to extract a portion of a file? The problem is that somewhere in my .sql file I have an old data that I need to compare to new data and I ...
0
votes
2answers
40 views

How to retrieve a name from another file with a Bash script?

I would like to grab a name out of another predefined file and use it within my shell script. The file being read would be in ./docs/description.org and the format (a table in .org format) is: ...
0
votes
0answers
25 views

cron job monitoring script

greeting of the day!!! please help me a situation, i am trying to develop a script which provides me details which my cron job is commented or stopped which job is running or scheduled. like we ...
0
votes
1answer
40 views

String pattern searching

I'm new to linux. I want to be placed as a System Admin. I attended an interview at Amazon. They asked me to write a cmd to find the string that starts with 's' and ends with 'a' in a file. I know ...
1
vote
4answers
45 views

Check which string occurs first in a growing file

I'm running a remote executable which produces a logfile. I want to write a script to check whether the executable is run successfully or encounters an error. The way I can do this is by looking at ...
1
vote
1answer
20 views

Pipeing lines to repeat commands

If my grep operation returns a list of ID's like: 12345 84758 49549 .. can I somehow feed/pipe each line to a commandline command's parameter? Like for example with the above result from grep, I'd ...
3
votes
2answers
392 views

How to search a text file for strings between two tokens in Ubuntu terminal and save the output?

How can I search a text file for this pattern in Ubuntu terminal and save the output as a text file? I'm looking for everything between the string "abc" and the string "cde" in a long list of data. ...
0
votes
2answers
38 views

How to List Files greater than particular timestamp?

I have a directory in linux which has a list of log files where log files get auto generated if some job runs. Each log file gets appended with the timestamp like "JobName_TimeStamp" UPDATED: ...
1
vote
2answers
192 views

How can I “grep” recursively filtering the name of the files I want with wildcards?

When I want to perform a recursive grep search in the current directory, I usually do: grep -ir "string" . But that command searches inside all kinds of files, including binary files (pictures, ...
1
vote
2answers
91 views

Compare MAC address of live network interface using grep to existing configuration files

Cloning VMs creates new network interface everytime on CentOS/RedHat VMs. I need to rename the ifcfg-eth* to the same name as the live interface on the VM. What I would like to do is to use a script ...
1
vote
2answers
129 views

If, else based on command piped to grep

I can't figure out how to make this (what supposed to be simple) script to work. Basically what I want, to run different stuff based on the state of my Parallels vm, something like this: if [ prlctl ...
0
votes
0answers
15 views

How can I use zgrep to take a file with IPs and recursively search another path, then take matching lines and correlate them into a single txt file?

How can I use zgrep to take a file with IPs and recursively search another path, then take matching lines and correlate them into a single text file? The command I have been using to find a single IP ...
0
votes
1answer
57 views

GREP for multiple strings with wildcard

I am trying to copy lines from a log file from certain days. Here's an example of what they look like. 2014-05-01T15:53:16+00:00 DEBUG (7): 2014-04-301T11:08:10+00:00 DEBUG (7): This GREP ...
1
vote
1answer
128 views

Why ssh connection is refused?

How can I set up ssh connection success for all times? I do remote communication to my Raspberry Pi using ssh. Most of the time I can connect. But sometimes, I got connection error as "session is ...
0
votes
1answer
42 views

What does ps axuwfw return?

I am getting strange output including my old makefile output and process tree when running below command on linux ps axuwfw Also, what is the usefulness of the following command and how does it ...
0
votes
2answers
72 views

Print or grep lines which start from second column

I want to print lines which start from second column (first column is white space). $ cat test.txt first second third four second five seven Output should be: second second ...
0
votes
1answer
26 views

grep and search and replace in linux accepting parameters with /

I'm trying to find and replace the contents of a file using grep and sed. ```grep "#!/bin/bash" ./ | sed xargs -i 's/#!/bin/bash/#!/usr/env bash' How do I make sure that the string #!/bin/bash will ...
0
votes
3answers
68 views

Grep for block surrounding an error message

I want to grep for the block of logs around a particular error message. Say I know my log looks like this: [----] I, [2014-04-10T19:12:36.294512 #1910:e93004] INFO -- : Started GET "/ems_infra/new" ...
0
votes
1answer
50 views

Oddity: “grep” cmd in /etc/network/interfaces

While digging through the birds-nest of network initialisation in our embedded linux setup (Linux SDK on Leopardboard SBC) we've come across what seems like an odd and possibly non-functioning line in ...
1
vote
2answers
138 views

How to search for a particular pattern in a log file and count the number of matches?

In a very large log file I have entries like : FLOW ENTERING somecompany.somepackage.datacontrol.provider.DataProvider@c37ae61.release() The only change between what differs between entries is ...
0
votes
1answer
45 views

How to grep rows that have value less than 0.2 in a specific column? [closed]

ID RT EZ Z0 Z1 Z2 RHO PHE 1889 UN NA 1.0000 0.0000 0.0000 0.8765 -1 1890 UN NA 1.0000 0.0000 0.0000 0.4567 -1 1891 UN NA 1.0000 0.0000 ...
1
vote
2answers
50 views

bzgrep -H pattern file.bz2 gives no filename, but “standard input”

I thought -H always should print filename before matched line. this is true for grep, but not for bzgrep: $ grep -H pattern file1 file1: data pattern data $ bzgrep -H pattern file2.bz2 (standard ...
0
votes
1answer
65 views

Extract stings between a delimiter if it matches a certain string

File cat hosts.cfg define host { host_name switchlan alias switchlan address ...
0
votes
0answers
6 views

Grep values from nethog and netperf [duplicate]

I need to monitor the network activities of a process and the bandwidth of the connection. So I decided to use nethog and netperf combine with grep and awk to write the values to a file. nethog ...
0
votes
2answers
93 views

Grep values from nethog and netperf

I need to monitor the network activities of a process and the bandwidth of the connection. So I decided to use nethog and netperf combine with grep and awk to write the values to a file. nethog ...
0
votes
1answer
22 views

How to find files that contain a string in its content OR the path?

Find and grep does not work afaik because I need to create a list of files that satisfy EITHER requirement, not both. I assume this requires more than a one-liner. Any suggestions?
1
vote
2answers
71 views

moving directories after grep

I have isseued the next command in order to move some directories to the "build_tools" folder however the result was not the one I expected. ls -l | grep 2014-03 | awk '{if ($8!=build_tools) print ...
1
vote
1answer
74 views

How to redirect ALL output from a command in Linux

I'm running Gentoo Linux. A program (equery) outputs a massive list of all the currently installed packages (equery list "*"). I want to find out which of them are unstable. Equery marks the unstable ...
1
vote
2answers
32 views

Search zipped *and* non-zipped files in one hit

I have a folder with a mix of zipped and unzipped log files which i want to search. I can search the non-zipped with grep -r "my-search-string" /path/to/folder and search the zipped files with ...
1
vote
2answers
167 views

How do I pipe output to date -d “value”?

I have a date like "2014-01-30 05:04:27 GMT", and if I run date -d "2014-01-30 05:04:27 GMT", the output is in my server's timezone ("Thu Jan 30 16:04:27 EST 2014"). With the use of grep and cut, I ...
2
votes
2answers
97 views

How to grep a line with a backslash at the end of the line?

I'm trying to grep a line with a backslash at the end of the line like: abc\ def ghij ... I hope it can grep the line "abc\". I tried the command below but they didn't work. grep -EHn "\\$" ...
1
vote
4answers
87 views

String Search: find and grep and?

Task: 1) find a string 'decor' inside files in a directory 2) get # of occurrence for decor for each file that has it The first part of the problem is partially solved with find . -type f | grep -i ...
1
vote
1answer
42 views

Why can ps know about the process that runs after it?

[root@myvm1 ~]# ps aux | grep ls root 13594 0.0 0.1 3912 672 pts/1 R+ 09:46 0:00 grep ls In the above, the ps aux runs first and its output is then redirected to the grep ls ...
0
votes
2answers
243 views

How to restrict grep to search only below a token of a column?

How can I use grep to search only the values of a column below a token? For example in the following CSV file: A B C 1 𝟒 5 2 𝟒 0 1 𝟑 6 ...how can I get ...
1
vote
1answer
26 views

emacs: run grep process without looking for .cshrc file in home directory

When I run emacs commands like grep or rgrep a new shell process is started and .cshrc is loaded from the home directory. There is quite a lot of stuff in it and I don't want to load it every time ...
0
votes
1answer
1k views

Recursive zgrep not working

I have a directory hierarchy that contains numerous .gz files. I want to be able to recursively grep them for the string "foo". From what I've read online the following should work: zgrep -R -H ...
2
votes
2answers
452 views

How to grep a group of files within a time range?

I'm trying to write a script used on a buffer box that does full packet capture of network traffic. As it's for a fairly big network we split the captures into 100MB segments. At times of high network ...
1
vote
2answers
118 views

Why is my recursive grep not working?

I am in a parent directory and want to search for any ODT files (LibreOffice Writer) that contain the phrase "GWT" in them. I'm on Ubuntu 12.04 desktop. From the terminal: ...
0
votes
0answers
56 views

Linux flow control exit or break on condition

I have a query about the following flow control. I need help to run a script that has these three conditions: Conditions: Successful: Proceed to read message. Fails: Exit to cat or just exit ...
3
votes
3answers
74 views

Use different colors for every another grep

How can I configure grep that I could highlight in color smarter? By using different colors? Problem : "grep --color" default use red to highlight matches, but it still difficult to read for ...
0
votes
2answers
49 views

display whole stream while highlighting with grep

I often use tail -f | grep someregex on log files. I have grep liased to grep ---color=auto so my matches are highlighted. If I want to see my matches in the context of the whole stream, how would I ...
2
votes
1answer
68 views

How to grep file containing some binary characters?

One application sometimes, not very often, puts some incorrect (binary) characters in log. Only information that it matches is printed, no matched lines. $ grep -e error app.log Binary file app.log ...
1
vote
3answers
692 views

How do I grep the first 50 lines of each file in a directory recursively?

I need to search the first 50 lines of every file in a directory and its subdirectories. This will do the recursive part, but how do I limit to just the first 50 lines of each file? grep -r ...
2
votes
1answer
621 views

Filter tail command through multiple grep commands to separate files

What I am trying to do is filter the output of one log file into separated log files based on a grep filter. tail -f test.log | tee >(grep "Error" > error.log) >(grep "Warning"" > warning.log) ...
2
votes
2answers
706 views

How to grep to check if strings is not there in a file (in linux) and also the case of multiple strings?

I want to search if "ack_enabled not defined" is not there in a particular file all_defs.txt and return something, by which i can understand that the string is not there. Can anyone tell me how to do ...
2
votes
3answers
131 views

What does really mean null string?

I'm sure most of us know that when we want that some regex matches with a string at the begin of the line we must use "^" ... But, I'm trying to understand what really means "empty string at the ...
0
votes
3answers
82 views

Pre-pending to an output line of `tail -f file` if its contents match another file

Trying to cram all of the following into the title was hard, so this is what I really mean: I am doing a tail -F access.log to watch an Apache2 log in realtime. The first thing on each line is an IP ...