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EIN -- FUER -- ALLE -- MAL!
i=$(($i+1))

During my day-to-day activities, I use the Bash shell a lot. My #1 policy is to optimize the most frequently used activities as much as possible, so I’ve compiled this handy bash shortcuts and hints (tested in SecureCRT on Windows and Konsole on Linux). It only touches on the default bash mode – emacs, not vi. If you haven’t specifically assigned your shell mode to vi (set –o vi), you’re almost certainly using the emacs mode. Learn these and your shell productivity will skyrocket, I guarantee it.

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egrep "image.*s.*(Los|sport)" /var/log/apache2/access_log | awk '{print $1}' | sort -n | uniq -c | sort -rn

http://my.opera.com/cpr/blog/show.dml/206175

Leaving basename() behind by chopping from the end of the variable-string:

$ for f in `ls *gif`;do echo $f; convert.exe $f ${f%.gif}.png;done
first_basic_admin.gif
first_comments_under_post.gif
first_congrats.gif
first_crud.gif
first_crud_layout.gif
first_custom_admin.gif
first_form_validation.gif
first_login.gif
first_routing.gif
first_welcome.gif
bash-3.00$ ls
first_basic_admin.gif          first_crud.png             first_login.gif
first_basic_admin.png          first_crud_layout.gif      first_login.png
first_comments_under_post.gif  first_crud_layout.png      first_routing.gif
first_comments_under_post.png  first_custom_admin.gif     first_routing.png
first_congrats.gif             first_custom_admin.png     first_welcome.gif
first_congrats.png             first_form_validation.gif  first_welcome.png
first_crud.gif                 first_form_validation.png  symfony_favicon.png
$ for p in `ls *png`; do echo \\pgfdeclareimage\{${p%.png}\}{pictures/${p%.png}};done

Caveat: Sanitize underscore in pgfimage handle

IMG_0020.JPG 020.JPG IMG_x020.JPG
IMG_0021.JPG 021.JPG IMG_x021.JPG
IMG_0022.JPG 022.JPG IMG_x022.JPG
IMG_0023.JPG 023.JPG IMG_x023.JPG
bash-3.1$ for f in `ls *JPG`; do mv $f IMG_x${f#IMG_0};  done

#!/bin/bash
awk -F"\t" '

  function makeEasyAccess()
  {
    system("mv " $1 "/cgi.ebay.de/ws/*html " $1 "/cgi.ebay.de/ws/index.html")
    system("sed s~##path##~cgi.ebay.de/ws/index.html~ index.html.tpl > " $1 "/index.html")
  }
  function conditionalFetch()
  {
    #http://www.unix.org.ua/orelly/unix/sedawk/ch10_03.htm
    if (system("test -r " $1 )) {
      print "\t not mirrored, fetching..."
      system(command)
      makeEasyAccess()
    }
    else print "\t already mirrored"
  }

  {
  URL="cgi.ebay.de%2Fws%2FeBayISAPI.dll%3FViewItem%26item" "=" $1
  command = ("/usr/bin/wget --quiet -P " $1 " -F -E -H -k -K -p http://" URL)

  if ( $2 !~ /^shop$/ ) {
    ebayEndtime = mktime ( 20 substr($2,7,2) " " substr($2,4,2) " " substr($2,1,2) " " substr($2,10,2) " " substr($2,13,2) " " substr($2,16,2) )
    if ( ebayEndtime < systime()) {
      print $1 ": ebayEndtime is in past"
      conditionalFetch()
    }
    else print $1 ": ebayEndtime is in future"
  }
  else {
    print $1 ": is a shop offer"
    conditionalFetch()
  }
}' Id_Endtime.txt

The input format is a plain tab-delimeted file with the end time in german format. Other formats need to adjust the above line "ebayEndtime = mktime ( 20 substr($2,7,2) " " substr($2,4,2) " " substr($2,1,2) " " substr($2,10,2) " " substr($2,13,2) " " substr($2,16,2) )"

7392197359 26.02.06 23:51:14 MEZ
7391483206 27.02.06 07:46:37 MEZ
7391548097 27.02.06 20:03:00 MEZ
7387433771 28.02.06 21:30:00 MEZ
6607816962 01.03.06 20:45:00 MEZ
7392366671 02.03.06 16:06:06 MEZ
6608401423 06.03.06 20:35:00 MEZ
7326030533 shop
7351499282 shop
7393652292 07.03.06 19:15:00 MEZ