Commands tagged grep sorted by votes

Commands tagged grep (409)

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Opens Windows internet shortcut files (*.url files) in Firefox.

This command will use grep to read the shortcut (which in the above examle is file.url), and filter out all but the only important line, which contains the website URL, and some extra characters that will need to be removes (for example, URL=http://example.com). The cut command is then used to get rid of the URL= at the beginning. The output is then piped into Firefox, which should interpret the it as a web URL to be opened. Of course, you can replace Firefox with any other broswer. Tested in bash and sh.
This is sample output - yours may be different.
0

firefox "$(grep -i ^url=* file.url | cut -b 5-)"

nachos117 · 2014-10-08 05:56:27 8
Install every (not already installed) component of the Google Cloud SDK

Google Cloud SDK comes with a package manager `gcloud components` but it needs a bit of `sed` to work. Modify the "^| Not" bit to change the package selection. (The gcloud --format option is currently broken) Show Sample Output
This is sample output - yours may be different.
```
gcloud components update pkg-go pkg-java pkg-python app gae-python-launcher-mac gae-go gae-java gae-python
```
0

gcloud components list | grep "^| Not" | sed "s/|$.*$|$.*$|$.*$|/\2/" | xargs echo gcloud components update

wires · 2014-10-13 20:52:25 11
Regex to reliably search a file for valid IP addresses (and external IP addresses)

Command returns valid IP addresses. Append the following regex to additionally filter out NAT and reserved IP addresses | grep -Ev "^0|\.0[0-9]|^10\.|^127\.|^169\.|^172\.(1[6-9]|2[0-9]|3[01])|^192.168.|^2(2[4-9]|3[0-9])|^2(4[0-9]|5[0-5])"
This is sample output - yours may be different.
0

grep -Eoa "\b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b" Filetosearch.txt

jsbrown · 2014-11-02 19:50:54 8
Check if a port is open to the internet using canyouseeme.org

For now just returns either "Success" or "Error". My awk-fu isn't strong enough to hackily parse out the error in case there is one, so I kept it simple. Show Sample Output
This is sample output - yours may be different.
```
~ user@host
&#10095; cysm 80
Success

~ user@host
&#10095; cysm 443
Error
```
0

cysm() { curl -sd port="$1" http://canyouseeme.org |grep -o 'Success\|Error' }

awh · 2014-11-11 23:30:39 8

Show apps that use internet connection at the moment.

Show top apps that use internet, sorted by count connections and grouped by TYPE and Protocol Show Sample Output

sudo lsof -P -i -n | awk '{print $1,$5,$8}' | tail -n +2 | uniq -c | sort -nr

anton_slim · 2014-12-18 05:22:33 9

nmap scan hosts for IP, MAC Address and device Vendor/Manufacturer

In the field, I needed to script a process to scan a specific vendor devices in the network. With the help of nmap, I got all the devices of that particular vendor, and started a scripted netcat session to download configuration files from a tftp server. This is the nmap loop (part of the script). You can however, add another pipe with grep to filter the vendor/manufacturer devices only. If want to check the whole script, check in http://pastebin.com/ju7h4Xf4 Show Sample Output
This is sample output - yours may be different.
```
10.0.0.1 AA:BB:CC:DD:EE:FF (Vendor)
10.0.0.2 BB:CC:DD:EE:FF:AA (Manufacturer)
10.0.0.3 FF:FF:FF:FF:FF:FF (Unknown)
```
0

nmap -sP 10.0.0.0/8 | grep -v "Host" | tail -n +3 | tr '\n' ' ' | sed 's|Nmap|\nNmap|g' | grep "MAC Address" | cut -d " " -f5,8-15

jaimerosario · 2014-12-26 18:31:53 13
Search recursively to find a word or phrase in certain file types, such as C code

Warnings and errors will be suppressed Show Sample Output
This is sample output - yours may be different.
```
./web/blah.html:33:		<div>some string and some such</div>
```
0

grep --include=\*.html -R "some string" . 2>/dev/null

sjmixon · 2015-02-04 17:59:41 8

dynamically list open files for a given process name

us lsof, grep for any pid matching a given name such as "node". Show Sample Output

lsof -i -n -P | grep -e "$(ps aux | grep node | grep -v grep | awk -F' ' '{print $2}' | xargs | awk -F' ' '{str = $1; for(i = 2; i < NF; i++) {str = str "\\|" $i} print str}')"

hochmeister · 2015-02-14 23:24:00 10

Find IPv4 addresses in files from current directory
This is sample output - yours may be different.
0

grep -R '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}' *

nitrogear · 2015-03-12 15:30:12 8
Search for a process by name

I like this method because I can make use of pgrep which also has the -f flag that can use regex to match patterns in the full command line string. It will also do ps -fww on all pids returned by pgrep, providing a list of process matching the regex provided. Show Sample Output
This is sample output - yours may be different.
```
UID        PID  PPID  C STIME TTY          TIME CMD
ntp      24062     1  0 Apr21 ?        00:00:00 ntpd -u ntp:ntp -p /var/run/ntpd.pid -g
```
0

ps -fwwp $(pgrep process_name)

acesaro · 2015-04-23 13:29:57 9
Use grep and aspell to help find crossword answers

You have a clue... 5 Down: You're looking at it (8) You have some letters... C--SS-O-- You use the terminal... Show Sample Output
This is sample output - yours may be different.
```
classroom
classwork
crossbows
crossroad
crosstown
crossword
```
0

grep -i "^c..ss.o..$" <(aspell dump master)

cwmwd24 · 2015-06-24 12:51:00 11
Grep for non-empty lines that do not start with # (comments) or <some-char> and does not include <some-char>

Grep for: >> non-empty lines : denoted by -v -e '^$' >> that do not start with # (comments) or : denoted by -v -e '^[#\]' >> and does not include : denoted by -v -e '\' (Note that we use -v only once)
This is sample output - yours may be different.
0

grep -v -e '^$' -e '^[#\[]' -e '\/' some_file

abhikeny · 2015-07-17 21:28:14 26
grep for all occurences of a (Perl-)regex in the complete, or part of man-database
This is sample output - yours may be different.
0

man -a --regex "byobu" |grep --color=always -i3P 'key[a-z-]*?s' | less -R

VoidDroid · 2015-10-18 10:38:01 10
Download files linked in a RSS feed

Just added a little url encoding with sed - urls with spaces don't work well - this also works against instead of enclosure and adds a sample to show that you can filter against links at a certain domain Show Sample Output
This is sample output - yours may be different.
```
Reusing existing connection to www.yourfeed.com:80.
HTTP request sent, awaiting response... 200 OK
Length: 176975 (173K) [application/pdf]
Saving to: 'MyFile.pdf'

MyFile.pdf            100%[==================================================================================================================>] 172.83K   488KB/s   in 0.4s   

2015-10-30 15:06:24 (488 KB/s) - 'MyFile.pdf' saved [176975/176975]
```
0

wget -q -O- http://www.yourfeed.com/rss | grep -o "<link[ -~][^>]*" | grep -o "http://www.myfeed.com[ -~][^\"]*" | sed "s: :%20:g" | xargs wget -c

dermidgen · 2015-10-30 22:13:43 24
Using NMAP to check if a port is open or close
This is sample output - yours may be different.
0

nmap -n 10.0.0.50 | grep udp | cut -d":"-f3>> test02

h_kaur2 · 2015-11-13 13:28:35 11
Using NMAP to check if a port is open or close
This is sample output - yours may be different.
0

nmap -n 10.0.0.50 | grep udp | cut -d":"-f3>>

h_kaur2 · 2015-11-13 13:31:14 10
grep in .odt files

find '.odt' files that contain USAGE: grepodt
This is sample output - yours may be different.
0

grepodt () { W=$1;P=$2;ls *.odt > /dev/null 2>&1;if [[ $? -ne 0 ]];then exit 1;fi;if [[ ! "$P" ]];then P='*';fi;for i in $P.odt;do unzip -qq "$i" content.xml;grep -l $W content.xml>/dev/null;if [[ $? -eq 0 ]];then echo $i;fi;rm content.xml; done;}

roberto_scotti · 2015-12-09 20:37:52 10
Execute grep only with files related to current node.js project

Only search source files directly related to current project. Everything under the "node_modules" directly are ignored.
This is sample output - yours may be different.
0

find * -type d -name node_modules -prune -o -type f -name \*.js -exec grep [opts] [pattern] {} \;

panic · 2015-12-11 16:42:07 11
Count relevant lines of shell code in a git repo

Uses git grep for speed, relies on a valid she-bang, ignores leading whitespace when stripping comments and blank lines Show Sample Output
This is sample output - yours may be different.
```
% egrep -v '^\s*($|#)' $(git grep -l '#!/bin/.*sh' *) | wc -l
14079
```
0

egrep -v '^\s*($|#)' $(git grep -l '#!/bin/.*sh' *) | wc -l

Natureshadow · 2016-02-15 11:15:48 15
tail from the last occurrence of a pattern to the end of the (log) file

I wanted a method to display the last run of my script from my log file. I had a pattern I could grep for to find the beginning of each run. This command line greps for that pattern in the log, finds the last occurrence and gives me the line number. Then I use the line number in tail to give me everything from that line number to the end of the log file. I tested this on Linux Mint (variant of Ubuntu) and on RHEL, but I suspect it will run many Linux systems.
This is sample output - yours may be different.
0

grep -n PATTERN /logs/somelog.log | cut -f1 -d: | tail -1 | xargs -I num tail -n +num /logs/somelog.log

goeltzec · 2016-07-29 15:47:26 29
See how many times you've typed 'ls' by itself

I seem to do this compulsively every time I change directories, sometimes even when I don't, even if I know exactly what I need to do. (Don't worry, the sample output is just an exaggeration. :) Show Sample Output
This is sample output - yours may be different.
```
23934729
```
0

grep -cx ls ~/.bash_history

Sparkette · 2016-09-14 17:06:59 17
Get the current svn branch/tag (Good for PS1/PROMPT_COMMAND cases)

Diverse trunk and branch, when last index is trunk, show trunk repository name when last index minus one is branches, show branch repository name
This is sample output - yours may be different.
0

svn info | grep ^URL | awk 'BEGIN {FS="\/"}; {if($(NF-1)=="branches") {print $NF} else if($NF=="trunk") {print $(NF-1)} else {print $NF} } '

mtaqwim · 2016-10-18 02:16:45 17
Use tail -f effectively by omiting unwanted lines containing particular pattern of words using grep -v.

This will be useful when checking for logs and have to omit specific weblogic or apache server's log information which are redundant and unnecessary. Show Sample Output
This is sample output - yours may be different.
```
[surya@suryalinux work]$ tail -f test | grep -v "bea"
19-07-2015
radar
liril
mayam
kayak

h4CkR
summa
sdlfjsk
```
0

tail -f test | grep -v "bea"

suryadavinci · 2016-10-28 21:05:42 17
GREP a PDF file.

grep pdf files easily
This is sample output - yours may be different.
0

pdfgrep pattern /the/path

ees · 2017-02-02 09:27:43 19
Find text in contents with multiple filename

-name : base of filename -o : 'or' '*.c' : avoiding "paths must precede expression" error message -type f : only find file type --color: hightlight specific word with color -E : extended regexp Show Sample Output
This is sample output - yours may be different.
```
./test.c: int Data;
./test.c: int iData;
./test.h: float fnData();
```
0

find ./$(PATH) -name '*.h' -o -name '*.c' -type f | xargs grep --color -E '*Data*'

debpolaris · 2017-02-10 04:17:16 19
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check remote port without telnet

Do some learning...

I like it sorted... 2> /dev/null was also needless, since our pipes already select stdin, only.

convert from decimal to hexadecimal

Use the standard calculator bc to convert decimals to hex

Position the cursor under the current directory line

In case you're like me and like your commands to start on clean lines, especially when you're deep into a 10-level directory tree. This can be added to .bashrc.

AWK: Set Field Separator from command line

Get your commandlinefu points (upvotes - downvotes)

This will calculate the your commandlinefu votes (upvotes - downvotes). Hopefully this will boost my commandlinefu points.

Switch to the previous branch used in git(1)

Very useful if you keep switching between the same two branches all the time.

Hiding and Show files on Mac OS X

These commands will mark a file as hidden or visible to Mac OS X Finder. Notice the capitol V vs the lowercase v. This will also work for directories. setfile -a V foo.bar; // This marks the file invisible setfile -a v foo.bar; // This marks the file visible I have also found that adding the following aliases are helpful: alias hide='setfile -a V' alias show='setfile -a v'

Install pip with Proxy

Installs pip packages defining a proxy

PulseAudio: set the volume via command line

If you have more than one SINK

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Commands tagged grep (409)

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