Commands using egrep (220)

  • Get a process's pid by supplying its name


    1
    pidof () { ps acx | egrep -i $@ | awk '{print $1}'; }
    pmbuko · 2009-02-06 15:33:46 12
  • ps grep with header

    Yet another ps grep function, but this one includes the column headings. Show Sample Output


    1
    psg () { ps auxwww | egrep "$1|PID" | grep -v grep }
    mulad · 2009-02-18 23:37:35 6
  • for x in `psql -e\l | awk '{print $1}'| egrep -v "(^List|^Name|\-\-\-\-\-|^\()"`; do pg_dump -C $x | gzip > /backups/$x-back.gz

    Ran as the postgres user, dumps each database individually. It dumps with the create statements as well, so you can just 'zcat $x-nightly.dmp.gz | psql' to reimport/recreate a database from a backup.


    1
    for x in `psql -e\l | awk '{print $1}'| egrep -v "(^List|^Name|\-\-\-\-\-|^\()"`; do pg_dump -C $x | gzip > /var/lib/pgsql/backups/$x-nightly.dmp.gz; done
    f4nt · 2009-02-21 15:21:09 6
  • Show battery infomations for OS X 10.5.x


    1
    system_profiler SPPowerDataType | egrep -e "Connected|Charge remaining|Full charge capacity|Condition" | sed -e 's/^[ \t]*//'
    bpfx · 2009-07-01 15:09:08 8
  • Search commandlinefu from the command line

    There's probably a more efficient way to do this rather than the relatively long perl program, but perl is my hammer, so text processing looks like a nail. This is of course a lot to type all at once. You can make it better by putting this somewhere: clf () { (curl -d "q=$@" http://www.commandlinefu.com/search/autocomplete 2>/dev/null) | egrep 'autocomplete|votes|destination' | perl -pi -e 's/<a style="display:none" class="destination" href="//g;s/<[^>]*>//g;s/">$/\n\n/g;s/^ +|\([0-9]+ votes,//g;s/^\//http:\/\/commandlinefu.com\//g'; } Then, to look up any command, you can do this: clf diff This is similar to http://www.colivre.coop.br/Aurium/CLFUSearch except that it's just one line, so more in the spirit of CLF, in my opinion. Show Sample Output


    1
    (curl -d q=grep http://www.commandlinefu.com/search/autocomplete) | egrep 'autocomplete|votes|destination' | perl -pi -e 's/a style="display:none" class="destination" href="//g;s/<[^>]*>//g;s/">$/\n\n/g;s/^ +//g;s/^\//http:\/\/commandlinefu.com\//g'
    isaacs · 2009-07-08 22:10:49 13
  • Scrape commands from commandline fu's 1st page

    just bored here at work ... if your are daring ... add '| bash' .... enjoy require 'ruby' Show Sample Output


    1
    curl -s http://www.commandlinefu.com/commands/browse|egrep '("Fin.*and"|<div class="command">.*</div>)'|sed 's/<[^<]*>//g'|ruby -rubygems -pe 'require "cgi"; $_=sprintf("\n\n%-100s\n\t#%-20s",CGI.unescapeHTML($_).chomp.strip, gets.lstrip) if $.%2'
    copremesis · 2009-08-18 19:04:03 4
  • Output files without comments or empty lines

    better integration. works on all Unices works one bash and ksh. Show Sample Output


    1
    function catv { egrep -v "^$|^#" ${*} ; }
    mobidyc · 2009-09-11 14:58:47 3
  • Grep auth log and print ip of attackers

    Work for me on CentOS, grep and print ip addresses of ssh bruteforce attempts Show Sample Output


    1
    egrep 'Failed password for invalid' /var/log/secure | awk '{print $13}' | uniq
    servermanaged · 2009-10-04 18:08:13 7
  • Build an exhaustive list of maildir folders for mutt

    Of course, you can adjust "Maildir" to your config... Show Sample Output


    1
    find ~/Maildir/ -mindepth 1 -type d | egrep -v '/cur$|/tmp$|/new$' | xargs
    ook · 2009-11-05 14:11:29 3
  • Find unused IPs on a given subnet


    1
    nmap -sP <subnet>.* | egrep -o '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' > results.txt ; for IP in {1..254} ; do echo "<subnet>.${IP}" ; done >> results.txt ; cat results.txt | sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4 | uniq -u
    bortoelnino · 2010-01-22 00:26:42 4
  • find all open files by named process

    lists all files that are opened by processess named $processname egrep 'w.+REG' is to filter out non file listings in lsof, awk to get the filenames, and sort | uniq to remove duplciation Show Sample Output


    1
    lsof -c $processname | egrep 'w.+REG' | awk '{print $9}' | sort | uniq
    alustenberg · 2010-02-24 16:47:49 6
  • Iterate through current directory + all subs for C++ header files and rank by # of comments

    This shows you which files are most in need of commenting (one line of output per file)


    1
    find ./ -name *.h -exec egrep -cH "// | /\*" {} \; | awk -F':' '{print $2 ":" $1}' | sort -gr
    blocky · 2010-04-23 19:00:07 3
  • dd with progress bar and statistics

    Will automatically take the size of the file but longer, usefull only if in an function.


    1
    dd if=FILE | pv -s $(stat FILE | egrep -o "Size: [[:digit:]]*" | egrep -o "[[:digit:]]*") | dd of=OUTPUT
    andrepuel · 2011-02-09 22:21:06 4
  • kill all running instances of wine and programs runned by it (exe)

    Look mah! All pipes


    1
    ps ax | egrep "*.exe|*exe]" | awk '{ print $1 }' | xargs kill
    coffeeaddict_nl · 2011-03-01 09:48:47 3
  • Show a script or config file without comments or blank lines


    1
    egrep -v "^$|^#" file
    wincus · 2011-05-23 11:39:24 18
  • Debug your makefile

    Say your dependencies specified in your Makefile (or dates on your source files) is causing 'make' to skip some source-files (that it should not) or on the other other end, if it is causing make to always build some source-files regardless of dates of target, then above command is handy to find out what 'make' thinks of your date v/s target date-wise or what dependencies are in make's view-point. The egrep part removes the extra noise, that you might want to avoid. Show Sample Output


    1
    make -d | egrep --color -i '(considering|older|newer|remake)'
    b_t · 2011-06-03 01:55:08 53
  • Find the package a command belongs to on debian-based distros

    Advanced revision to the command 8776 . This revision follows symbolic links. The quotation-marks surrounding $(which $1) allows for graceful handling of errors ( ie. readlink does not complain incase 'which' command generates (null) output) Show Sample Output


    1
    whichpkg () { dpkg -S $1 | egrep -w $(readlink -f "$(which $1)")$; }
    b_t · 2011-07-17 13:39:56 3
  • Get all URLs from webpage via Regular Expression

    Get all URLs from website via Regular Expression... You must have lynx installed in your computer to execute the command. --> lynx --dump "" | egrep -o "" - Must substitute it for the website path that you want to extract the URLs - Regular Expression that you wanna filter the website Show Sample Output


    1
    lynx --dump "http://www.google.com.br" | egrep -o "http:.*"
    felipelageduarte · 2011-09-05 01:12:15 3
  • Hide comments

    Hide comments and empty lines, included XML comments, Show Sample Output


    1
    nocomments () { cat $1 | egrep -v '^[[:space:]]*#|^[[:space:]]*$|^[[:space:]]*;' | sed '/<!--.*-->/d' | sed '/<!--/,/-->/d'; }
    RuizTapiador · 2011-11-04 12:47:39 57
  • Equivalent to ifconfig -a in HPUX

    Command is properly working on HP-UX 11.31 Show Sample Output


    1
    for i in `netstat -rn|egrep -v "Interface|Routing"|awk '{print $5}'`;do ifconfig $i;done
    giorger · 2011-12-16 09:49:03 6
  • url shortner using google's shortner api

    First get a api key for google url shortner from here https://developers.google.com/url-shortener/ Then replace the API_KEY in the command Show Sample Output


    1
    shorty () { curl -s https://www.googleapis.com/urlshortener/v1/url\?key\=API_KEY -H 'Content-Type: application/json' -d '{"longUrl": "'"$1"'"}' | egrep -o 'http://goo.gl/[^"]*' }
    cybersiddhu · 2012-04-26 18:30:50 4
  • Plaintext credentials sniffing with tcpdump and grep

    Simple TCPDUMP grepping for common unsafe protocols (HTTP, POP3, SMTP, FTP) Show Sample Output


    1
    tcpdump port http or port ftp or port smtp or port imap or port pop3 -l -A | egrep -i 'pass=|pwd=|log=|login=|user=|username=|pw=|passw=|passwd=|password=|pass:|user:|username:|password:|login:|pass |user ' --color=auto --line-buffered -B20
    jseidl · 2012-06-18 19:27:54 3
  • Clean config from # and empty strings


    1
    egrep -v '(\t)?#.*|^$' /etc/apache2/sites-available/default
    sc0rp1us · 2012-12-07 06:04:14 4
  • tcpdump sniff pop3,imap,smtp and http


    1
    tcpdump -i eth0 port http or port smtp or port imap or port pop3 -l -A | egrep -i 'pass=|pwd=|log=|login=|user=|username=|pw=|passw=|passwd=|password=|pass:|user:|userna me:|password:|login:|pass |user '
    ene2002 · 2013-02-07 19:14:58 4
  • Shows size of dirs and files, hidden or not, sorted.

    Enhanced version: fixes sorting by human readable numbers, and filters out non MB or GB entries that have a G or an M in their name.


    1
    du --max-depth=1 -h * |sort -h -k 1 |egrep '(M|G)\s'
    TerDale · 2013-02-14 08:56:56 6
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Find files that have been modified on your system in the past 60 minutes
Useful mainly for debugging or troubleshooting an application or system, such as X11, Apache, Bind, DHCP and others. Another useful switch that can be combined with -mmin, -mtime and so forth is -daystart. For example, to find files that were modified in the /etc directory only yesterday: $ sudo find /etc -daystart -mtime 1 -type f

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Watch and cat the last file to enter a directory
Great for watching things like Maildir's or any other queue directory.

Remove specific entries from iptables
Then you can remove the specific entry: iptables -D INPUT 10 Just make sure these are set: IPTABLES_SAVE_ON_STOP="yes" IPTABLES_SAVE_ON_RESTART="yes" Else your changes won't stick when you restart iptables.

Convert an existing Git repo to a bare repo
If you want to turn a Git repo into the origin that folks can push to, you should make it a bare repository. See: http://stackoverflow.com/questions/2199897/git-convert-normal-to-bare-repository

Find and display most recent files using find and perl
This pipeline will find, sort and display all files based on mtime. This could be done with find | xargs, but the find | xargs pipeline will not produce correct results if the results of find are greater than xargs command line buffer. If the xargs buffer fills, xargs processes the find results in more than one batch which is not compatible with sorting. Note the "-print0" on find and "-0" switch for perl. This is the equivalent of using xargs. Don't you love perl? Note that this pipeline can be easily modified to any data produced by perl's stat operator. eg, you could sort on size, hard links, creation time, etc. Look at stat and just change the '9' to what you want. Changing the '9' to a '7' for example will sort by file size. A '3' sorts by number of links.... Use head and tail at the end of the pipeline to get oldest files or most recent. Use awk or perl -wnla for further processing. Since there is a tab between the two fields, it is very easy to process.

list files recursively by size

check open ports without netstat or lsof

Scans for open ports using telnet

Efficient count files in directory (no recursion)
$ time perl -e 'if(opendir D,"."){@a=readdir D;print $#a - 1,"\n"}' 205413 real 0m0.497s user 0m0.220s sys 0m0.268s $ time { ls |wc -l; } 205413 real 0m3.776s user 0m3.340s sys 0m0.424s ********* ** EDIT: turns out this perl liner is mostly masturbation. this is slightly faster: $ find . -maxdepth 1 | wc -l sh-3.2$ time { find . -maxdepth 1|wc -l; } 205414 real 0m0.456s user 0m0.116s sys 0m0.328s ** EDIT: now a slightly faster perl version $ perl -e 'if(opendir D,"."){++$c foreach readdir D}print $c-1,"\n"' sh-3.2$ time perl -e 'if(opendir D,"."){++$c foreach readdir D}print $c-1,"\n"' 205414 real 0m0.415s user 0m0.176s sys 0m0.232s

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