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    Programming

    1.Unix | 2.* Perl * | 3.PHP | 4.ASP.NET | 5.ASP | 6.Visual C++ | 7.Visual Basic | 8.JavaScript | 9.HTML | 10.CSS |
    11.CGI, bin and Perl | 12.Cygwin | 13.Linux | 14.mySQL | 15.Python | 16.robertbody C++ & *.BAT |
    17.Unix Notes (live) | 18.Perl Notes (live)

    Unix

    -  +
    see also: [ CGI, bin and Perl ] in section bin/ section for script examples of tgz, untgz, etc bg, fg, fg %2
    a few examples follow, and [ Unix Notes (live) ] - server resident file, has many more examples
    #-------------------------------------shell-------------------------------------
    PS1='$PWD> '           # prompt showing current directory
    PATH=$PATH':whatever'  # append to path
    cd -                   # previous directory
    
    #-------------------------------------date-------------------------------------
    date -v-7H "+%A %l:%M:%S %p, %Y-%m-%d"   # Friday  3:59:50 PM, 2003-09-12 ( -7 hours from GMT specified )
    date +"%Y-%m-%d-%H-%M"                   # 2005-11-09-13-19
    
    #-------------------------------------tar-------------------------------------
    # tar -c create, -x extract, -f file, -v verbose
      tgz: tar -cvf - $* | gzip > my.tgz       # "-" alone important 
    untgz: gunzip -c my.tgz | tar -xvf -
    
    #-------------------------------------scripts-------------------------------------
    for ((x=1;x<20000;x++)); do clear; ls -al; sleep 5; done    # for (c-style) loop
    for i in $* ; do echo $i; done;        # for-in loop; all ARGV command line arguments 
    
    #-------------------------------------strings-------------------------------------
    echo "Make LOWERCASE" |  tr A-Z a-z # convert from uppercase to lowercase
    ls -w | sed s/www.robertbody.com./RB:/              # replace "www...com" with "RB:"
    
    #-------------------------------------scripts-------------------------------------
    tail -200 file* | grep -B1 redirect
    ls -w | sed s/www.robertbody.com./RB:/
    
    for i in $* ; do
      if [ -a $i ]; then               # if file exists (specified as parameters)
        echo "$H $i <-- ok";
      else
        echo "$H $i <-- does not exist"; allFound=0;
      fi;
    done;
    #-------------------------------login script example------------------------------
    /www/robertbody/robertbody.com> cat r
    echo "...robertbody setup..."
    echo "   PS1='\$PWD> '"
    echo " MYBIN=/www/robertbody/robertbody.com/cgi-bin/bin"
    echo "     C=/www/robertbody/robertbody.com/cgi-bin/counter"
    echo "  PATH=.:\$PATH:\$MYBIN"
    echo "......................"
    PS1='$PWD> '
    MYBIN=/www/robertbody/robertbody.com/cgi-bin/bin
    C=/www/robertbody/robertbody.com/cgi-bin/counter
    PATH=.:$PATH:$MYBIN
    
    find . -name '*.html' | xargs grep -L '</html>'   # find *.html files (within subdirs) which don't have </html>
    
    tar -xvf /cygdrive/c/robert-backup/2009-09*.tgz --wildcards --no-anchored 'ola'  # extract filenames with 'ola'
    

    www.bell-labs.com - History of Unix
    www.ee.surrey.ac.uk - Teaching Unix
    Links - Regular Expressions:
    http://search.cpan.org/~jhi/perl-5.8.0/pod/perlretut.pod#Extracting_matches - Extracting matches

    sed
    Xterm FAQ - dickey
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    Last Updated: Wed, November 23, 2005 21:32