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2012-12-25

vim cheat sheet

" file: vim-cheat-sheet.vim v.1.1.0 docs at the end
" 
" how-to start vim in the shell by opening list of files 
vim -o /path/to/some/file-1 /path/to/another/file-2
" how-to exit without saving (the hyphen meaning is the same for all commands )
:q! 
" open all the perl files in the current directory 
vim *.pl  
" open a new bugger with the ouptput from a command
find ~ -name '*vim*' | vim -
" press Esc press w to save the file ,q to quit , ! for not saving anything
:wq!
" how-to open a directory 
:e /etc/
 
"how-to save the changes  were editing. For saving the file under a different name, specify the file name.
:w 
" how-to list the opened files ( called in vim buffers ) 
:ls
" how-to close a buffer  
:bd <<buffer_number>>
" how-to close the current buffer 
:bd 
"Write the file and exit.
:wq 
" how-to reload the current buffer if the file has been edited by another tool
:edit
" how-to get help 
:help 
 
"how-to search or jump to 
/itemToSearchInTheText
" Hit Enter
" hit n to jump to the next match 
" hit N to jump to the previous match 
 
"how-to navigate in the text
" enter normal mode first , note this navigation keys work only in normal and visual modes
Esc
" how-to go one line below
j
" how-to go one line up 
k 
" how-to go one character left in normal mode  
l
" how-to go one character right in normal mode
h
" how-to backward a word in normal mode 
B
" how-to foward a word in normal mode 
e
" how-to go the begining of the document in normal mode
gg
" how-to go the end of the document 
G
" how-to jump to line number xxx ( for example line number 34 ) 
34G 
" how-to jump back from where you were in the previous time
' -(Press ' twice ) jump back to line (where you came from) 
" go to the beginning of the line 
^
" jump to the end of a line.
$ 
" jump to the beginning of a word.
b 
" go backwards a word 
B
" jump to a stringToSearchFor
:/stringToSearchFor
" jump to the previous occurence once having hit enter after the search 
N
 
" jump to the matching brackets [](){} .
" go on top of the bracket and press 
%
 
" how-to delete text
" how-to delete the current line 
dd 
" or 
:d 
" how-to delte 3 lines in normal mode
3d
 
" START COPY PASTE 
" how-to select text and copy paste
" first enter into visual mode 
Esc,v 
" navigate within the text with the navigation keys ( see above ) 
j,k,l,h
" than yank the selected into the register ( Ctrl + C in Windows - copy to clipboard ) 
y 
" or to cut it after the selection into the register ( Ctrl + X in Windows - cut it into the clipboard ) 
d 
" in visual mode Yank the current line. You do not need to highlight it first.
yy or :y or Y 
" Esc to run into the normal mode,navigate to the place where to paste the text and paste it: 
p 
" Undo the last actionUndo the last action
u 
 
" STOP COPY PASTE 
 
 
" START working with buffers 
" list the currently opened buffers ( or files for writing ) 
:ls
" open a file as another bugger
:e /path/to/file3
" switch again to the first bugger 
:b 1
" switch to the next buffer without saving the current one 
:bn!
" switch to the previous file buffer ( your will be prompted to save it if you have not done it yet)
:bp  
" go to the next buffer
:cnext 
" open the file under the cursor in Normal mode
gf 
" opens a new file in a new window
:split /usr/share/some.file  
 
" STOP working with buffers 
 
" START SEARCH AND REPLACE 
" how-to search and replace text with confirmation before each replace 
:%s/search_for_this/replace_with_this/c
 
" how-to Find and replace 
:%s/foo/bar/g Replace every occurrence of the word foo with bar in the whole file.
 
" how-to remove all the lines containing the string "clear"
:%s/^.*clear$\n//gi  
 
" For all lines in a file, find "string_to_find" and replace with "string_to_replace" for each instance on a line. Ask for confirmation 
:%s/string_to_find/string_to_replace/gc 
 
"  - For all lines between line marked "a" (ma) and line marked "b" (mb), find string "fff" and replace with string "rrrrr" for each instance on a line. Case insensitive. 
:'a,'bs/fff/rrrrr/gi
" For all lines in a file, delete blank spaces at end of line. 
:%s/*$/ 
" For all lines in a file, move last field delimited by ":" to the first field. Swap fields if only two.
:%s/\(.*\):\(.*\)/\2:\1/g 
 
" how-to get help on search and replace commands  
:help substitute 
:help pattern 
 
 
" STOP SEARCH AND REPLACE 
 
 
" where vim sets the settings of the "sessions" 
vim ~/.viminfo
 
" How to edit the colors of the current color scheme: 
" 1. Check the name of your current color scheme located at: /root/.vimrc or /home/usrname/.vimrc (attention come kind of aliasing ... )
:colorscheme elflord
 
" 2. Edit the current colorsheme 
locate elflord.vim 
" search for the section containinng the colors would like to edit
/comments
 
" 3. Pick a HEX number for the color of the comments you would prefer to have .. "40FF00 (google color table )
" Enters the file under the cursor into the editor in you commend line (normal mode).
Ctrl-R Ctrl-F 
 
Ctrl-R Ctrl-A Enters the text from the editor in you commend line (normal mode).
" As most other *nix applications, you can also pause Vim with Ctrl-z, which will drop you back to the shell. When you are re finished, you can resume Vim with fg. (This is a feature of the shell, not a Vim feature.)
 
 
" how-to show the current directory
:!pwd"  
 
" START folding 
" jump to the beginning char of the folding - for example the brackets of the function 
e
" change to visual mode
Esc , v
" select till the end of the desired folding region 
%
" to fold the region type the following command
:fold
" to open the just closed folded region 
zo 
" to close it back again 
zc 
" STOP folding
 
 
   " START indending 
   " enter normal mode
   Esc
   " enter visual mode
   v
   " select the text you would like to intent / shift wit the navigation keys
   " shift with 
   >>
   " or 
   <<
   " STOP indending 
 
 
" START SETTINGS 
" all of those could be set in the ~/.vimrc file 
 
" adjust the amount of space on pressing tab
:set tabstop=3
" set cursor showing matching brackets 
:set showmatch 
" set the appearance on the left side for the line numbers
:set number
" set syntax highlighting 
:set 
" set a specific type of syntax 
:set syntax=html
" set the heigt of the window 
:set winheight=90 
" set the default shift width 
:set sw=3
" set the columnn width to 120 characters 
:set co=120 
" set wrapping 
:set wrap 
 
" STOP SETTINGS 
 
 
" how-to create your own syntax highting 
" create your customizable syntax highlighting dir
mkdir -p ~/.vim/syntax/
" copy the already existing syntax file to this folder
cp -c /cygdrive/f/cygwin/usr/share/vim/vim73/syntax/perl.vim ~/.vim/syntax/
" edit the "overriding " syntax file 
: e ~/.vim/syntax/perl.vim
"
 
" START COMMANDS 
" Any UNIX command can be executed from the vi command line by typing an "!" before the UNIX command. 
" how-to insert the current date 
:r! date +"\%Y-\%m-\%d \%H:\%M:\%S"
" how-to insert the full paths from the current directory 
:r! find `pwd`
" navigate onto a file path and press 
gf
" to openn it into another buffer
" STOP COMMANDS 
 
 
 
"START Mappings 
"show all the mappings 
:map
" the keyboard shortcuts performing user defined commands which could be saved in the .vimrc file
" Ctrl + Tab for switching to the next buffer
map <C-Tab> :bn!<CR> 
 
map <f4> :bn! <CR> :bd "<CR>  Ctrl + F4 - for closing the current buffer
" STOP Mappings 
 
" 
 
" Purpose: 
" to provide a tutorial-like vim-cheat-sheet 
" 
" sources 
http://www.yolinux.com/TUTORIALS/LinuxTutorialAdvanced_vi.html
" 
" VersionHistory
" 1.0.1 --- 2012-12-26 11:58:40 --- ysg --- enhancements 
" 1.0.0 --- 2012-12-25 10:30:16 --- ysg --- Initial creation 
"
" eof file: vim-cheat-sheet.vim

2012-12-24

.vimrc example

" file:~/.vimrc v1.0.0 docs at the end 
 
" enable syntax hightlighting 
syntax on 
 
" allways show status line
set ls=2 
 
" set the default windows height to 92
set winheight=92
 
" set the brightest possible colorscheme 
colorscheme elflord 
 
" set the number of spaces the tab should produce
set tabstop=3
 
" display always the row number on the left 
set number 
 
" ignore case when searching
set ignorecase     
 
" show the title in the console title bar 
set title
 
" smooth changes 
set ttyfast 
 
" highlight the searched items  
set hlsearch
 
" autoindent by default 
set autoindent
 
 
" enable MUI type of buffer switching 
" NOK map <C-Tab> :bn!<CR>
 
 
" purpose:
" provide the defaults for the vim on the hostname host
" credits and sources : http://phuzz.org/vimrc.html
"
" VersionHistory
" 1.0.0 --- 2012-12-24 14:22:52 --- ysg --- Initial creation from source  
" eof file: ~/.vimrc 
 
pre class=

2012-12-16

bash stub

#!/bin/bash
# File: sh-stub.sh v.1.5.0 docs at the end 
umask 000 ; 
 
# print the commands 
# set -x
# print each input line as well
# set -v
# exit the script if any statement returns a non-true return value. gotcha !!!
# set -e 
 
 
#
# parse the single letter command line args 
doParseCmdArgs(){
 
while getopts ":a:h" opt; do
  case $opt in
    a)
      doLog "-a cmd arg was triggered, Parameter: $OPTARG" >&2
      export vars="$vars $OPTARG"
      doLog "\$vars is $vars"
      ;;
    h)
      doLog "-h cmd arg was triggered, Parameter: $OPTARG" >&2
      doPrintHelp 0
      ;;
    \?)
      doLog "Invalid option: -$OPTARG" >&2
      doPrintHelp 2
      exit 1
      ;;
    :)
      doLog "Option -$OPTARG requires an argument." >&2
      doPrintHelp
      exit 1
      ;;
  esac
done
}
# eof func doParseCmdArgs
 
 
#
# set the variables from the $0.`hostname`.conf file which has ini like syntax
doSetVars(){
   MyDir=`dirname $(readlink -f $0)`
   Tmp="$MyDir/tmp/tmp.$$"
   mkdir -p $Tmp           #create the tmp dir if it does not exist 
   ( set -o posix ; set ) >$Tmp/variables.before 
   MyName=`basename $0`
   IniFile="$MyDir/$MyName.`hostname`.conf"
   IniSection=MainSection
   LogFile="$MyDir/$MyName.log"
   # get the machine / host specific configuration 
   for i in {1..5} ; do cd .. ;done ;
   ProductBaseDir=`pwd`;
   export ProductBaseDir;
   cd "$MyDir/"
   doParseIniFile
   #source $0
   ( set -o posix ; set ) >$Tmp/variables.after
   doLog " Using the following vars :"
   cmd="comm --nocheck-order -3 $Tmp/variables.before $Tmp/variables.after"
   doRunCmdAndLog $cmd
   rm -fr "$Tmp/"
}
# eof function doSetVars
 
 
#
# parse the ini like $0.hostname.conf and set the variables
doParseIniFile(){
   eval `sed -e 's/[[:space:]]*\=[[:space:]]*/=/g' \
      -e 's/;.*$//' \
      -e 's/[[:space:]]*$//' \
      -e 's/^[[:space:]]*//' \
      -e "s/^\(.*\)=\([^\"']*\)$/\1=\"\2\"/" \
      < $IniFile \
      | sed -n -e "/^\[$IniSection\]/,/^\s*\[/{/^[^;].*\=.*/p;}"`
}
# eof function doParseIniFile
 
 
#
# run a command and log the call and its output to the LogFile
# usage: doRunCmdAndLog $cmd
doRunCmdAndLog(){
   cmd="$*" ; 
   doLog " DEBUG running cmd : \"$cmd\""
   Msg=$($cmd 2>&1)
   [ $? -eq 0 ]  || doLog "ERROR : Failed to run the following command \"$cmd\" with the following output \"$Msg\" !!!"
   doLog " DEBUG : cmdoutput : \"$Msg\""
}
# eof function doRunCmdAndLog
 
 
#
# run a command on failure exit with message
# usage: doRuncmdOrExit $cmd
doRuncmdOrExit(){
   cmd="$*" ; 
   doLog " DEBUG running cmd : \"$cmd\""
   Msg=$($cmd 2>&1)
   # if error occured during the execution exit with error
   [ $? -eq 0 ] || doExit "ERROR : FATAL : Failed to run the following command \"$cmd\" with the following output \"$Msg\" !!!"
   #if no error occured just log the message
   doLog " DEBUG : cmdoutput : \"$Msg\""
}
# eof function doRuncmdOrExit
 
 
#
# runs procs in parallel on a file set from the the find command 
doRunProcsInParallel(){
 
   cmd="zgrep $strToGrep '{}' >> $FileFilteredResults"
   #todo remove echo 
   doLog "RUNNING cmd find ${DirFindRoot} -type f  -name ${nameFilter} -print0 | xargs -0 -I '{}' sh -c $cmd!!!"
   #Action !!!
   #debug sleep 1
   find ${DirFindRoot} -type f  -name ${nameFilter} -print0 | xargs -0 -I '{}' sh -c "$cmd"
 
}
# eof doRunProcsInParallel
 
 
#
# echo pass params and print them to a log file
doLog(){
      # check terminal if exists echo 
      test -t 1 && echo "`date +%Y.%m.%d-%H:%M:%S` [$$] $*"
      # check LogFile and 
      test -z $LogFile || {
        echo "`date +%Y.%m.%d-%H:%M:%S` [$$] $*" >> $LogFile
      } # eof test
 } 
# eof function doLog 
 
#
# perform the checks to ensure that all the vars needed to run are set 
doCheckReadyToStart(){
 
   test -f $IniFile || doExit 1 "Cannot find IniFile : $IniFile" 
 
}
# eof function 
 
 
# exit with passed status and message
doExit(){
  ExitCode=0 
  case $1 in [0-9]) 
  ExitCode="$1";
    shift 1;
    esac 
    Msg="$*"
    if [ "$ExitCode" != 0 ] ; then
      Msg=" ERROR --- ExitCode $ExitCode --- Msg : $Msg" 
    fi
    doLog " $Msg" 
    echo -e "\n\n"
    exit $ExitCode
}
# eof function doExit
 
 
#
# the main function called 
main(){
   doSetVars
   doParseCmdArgs $@
   doCheckReadyToStart
  }
# eof function main
 
doPrintHelp(){
 
   ExitCode="$1";
   
   echo ""
   echo ""
   echo `basename $0` "is an utlity script having the following purpose"
   echo " to provide an easy starting template for writing bash and sh scripts"
   echo " with  the following features: "
   echo " - prints the set in the script variables"
   echo " - separation of host specific vars into $0.`hostname`.conf file"
   echo " - doLog function for both xterm and log file printing"
   echo " - for loop examples with head removal and inline find and replace "
   echo " - getopts example for accepting cmd args "
   echo ""
   echo ""
   
   doExit $ExitCode "printing help and exit" 
}
# eof func doPrintHelp
 
 
# Action !!! call the main by passing the cmd args 
main $@
 
 
 
# Purpose:
# to provide an easy starting template for writing bash and sh scripts
# with  the following features: 
# - prints the set in the script variables
# - separation of host specific vars into $0.`hostname`.conf file
# - doLog function for both xterm and log file printing
# - for loop examples with head removal and inline find and replace 
# 
# ErrorCodes 
# 1 --- Cannot find conf file 
# 2 --- called with a wrong cmd argument or -h for help 
# 
# VersionHistory: 
# 1.5.1 --- 2012-12-15 23:38:46 --- ysg --- fixed bug with test
# 1.5.0 --- 2012-12-15 23:04:09 --- ysg --- Added getopts function for cmd parsing
# 1.4.2 --- 2012-11-09 13:10:03 --- ysg --- ErrorCode added , refactoring
# 1.4.1 --- 2012-11-09 13:10:03 --- ysg --- Refactoring 
# 1.4.0 --- 2012-10-24 08:57:01 --- ysg --- Added the doRunProcsInParallel function 
# 1.3.1 --- 2012-10-11 12:29:47 --- ysg --- doMethod naming , doExit change with ERROR
# 1.3.0 --- 2012-05-20 18:48:08 --- ysg --- replacing cmd with error output
# 1.2.6 --- 2012-05-02 20:41:11 --- ysg --- added for loop with pipes 
# 1.1.0 --- ysg --- add runcmd with erro
# 1.0.0 --- ysg --- Initial creation
# EOF File:sh_stub_cygwin.sh
\2\span class=

vim cheat sheet

   # how-to start vim in the shell 
   vim -o /path/to/file1 /path/to/file2
   # press Esc, press w to save the file ,q to quit
   wq!
   #how-to get help in vim 
   :help 
   #how-to search or jump to 
   /itemToSearchInTheText --- works without the colon also 
   #how-to navigate in the text
   # enter normal mode first 
   Esc
   # how-to go one line below
   j
   # how-to go one line up 
   k 
   # how-to go one character left in normal mode  
   l
   # how-to go one character right in normal mode
   h
   # how-to backward a word in normal mode 
   B
   # how-to foward a word in normal mode 
   e
   # how-to go the begining of the document in normal mode
   gg
   # how-to go the end of the document 
   G
   # how-to jump to line number xxx ( for example 495 ) 
   495G 
   # how-to jump back from where you were in the previous time
   ' -(Press ' twice ) jump back to line (where you came from) 
   #
   Ctrl + O --- Ctrl + I --- e - 0 To the beginning of a line.
   $ To the end of a line.
   b To the beginning of a word.
   :/tokenToSearch n - N 
   :%s/search_for_this/replace_with_this/c   - confirm each replace
   :?tokenToSearch n - Ctrl + o - Ctrl + i - N - 
 
   [](){} %
 
   Deleting 
   dd or :d Delete the current line.
 
   # how-to select text and copy paste
   # first enter into visual mode 
   Esc,v 
   # navigate within the text with the navigation keys ( see above ) 
 
   # than yank the selected into the buffer ( Ctrl + C in Windows - copy to clipboard ) 
   y 
   # or to cut it after the selection with 
   d 
   yy or :y or Y Yank the current line. You don't need to highlight it first.
   u Undo the last action
   Esc to run into the normal mode 
   p - to paste
 
 
   Find and replace 
   :%s/foo/bar/g Replace every occurrence of the word foo with bar in the whole file.
 
   :%s/^.*clear$\n//gi --- remove all the lines containing the string "clear" 
 
   Find/Replace: 
   Example: 
   :%s/fff/rrrrr/g - For all lines in a file, find string "fff" and replace with string "rrrrr" for each instance on a line. 
   :%s/fff/rrrrr/gc - For all lines in a file, find string "fff" and replace with string "rrrrr" for each instance on a line. Ask for confirmation 
   :'a,'bs/fff/rrrrr/gi - For all lines between line marked "a" (ma) and line marked "b" (mb), find string "fff" and replace with string "rrrrr" for each instance on a line. Case insensitive. 
   :%s/*$/ - For all lines in a file, delete blank spaces at end of line. 
   :%s/\(.*\):\(.*\)/\2:\1/g - For all lines in a file, move last field delimited by ":" to the first field. Swap fields if only two. 
   For more info type: 
   :help substitute 
   :help pattern 
   :help gdefault 
   :help cmdline-ranges
 
 
   where vim sets the settings of the "sessions" 
 
   vim /root/.viminfo
 
   vim /home/sysadmin/.viminfo
 
   vim /home/nortel/.viminfo
 
   How to edit the colors of the current color scheme: 
 
   1. Check the name of your current color scheme located at: /root/.vimrc or /home/usrname/.vimrc (attention come kind of aliasing ... )
 
   set colorsheme=dark
   :colorscheme elflord
 
 
   2. Edit the current colorsheme 
 
   /usr/share/vim/vim63/colors/darkblue.vim
 
   /comments
 
   3. Pick a HEX number for the color of the comments you would prefer to have .. #40FF00 (google color table )
 
   Ctrl-R Ctrl-F Enters the file under the cursor into the editor in you commend line (normal mode).
 
   Ctrl-R Ctrl-A Enters the text from the editor in you commend line (normal mode).
 
   Mappings 
 
   the keyboard shortcuts performing user defined commands which could be saved at the /etc/vimrc
 
   map <C-Tab> :bn!<CR> ---- Ctrl + Tab for switching to the next buffer
 
   map <f4> :bn! <CR> :bd #<CR> --- Ctrl + F4 - for closing the current buffer
 
   As most other *nix applications, you can also pause Vim with Ctrl-z, which will drop you back to the shell. When you're finished, you can resume Vim with fg. (This is a feature of the shell, not a Vim feature.)
 
 
   Any UNIX command can be executed from the vi command line by typing an "!" before the UNIX command. 
   Examples: 
   ":!pwd" - shows your current working directory. 
   ":r !date" - reads the results from the date command into a new line following the cursor.
 
   http://www.yolinux.com/TUTORIALS/LinuxTutorialAdvanced_vi.html
 
   Working with files
 
   :bn -- switch to the next file buffer
   :bp -- switch to the previous file buffer 
 
   :ls -- list the opened file buffers
   :buffer 17 --- go to the file with number 17 listed in the previous command
 
   Go to line 10 :10
   Redo Ctrl+R 
 
   gf -- open the file under the cursor in Normal mode
 
   :bd --- close the current file buffer
 
   :e /var/tmp.txt open new buffer (and window ) with the /var/tmp.txt file 
 
   :new /path/to/the/file/to/open in 
 
   set winheight=90 (also could be added to /etc/vimrc
 
   vim *.pl --- open all Perl scripts in the current directory
 
   :cnext :bn -- go to the next buffer
 
   :ls list all the buffers
 
   :bn 3 -- go the nubmer of the buffer listed from the previous command 
 
   to Quit VIM :q
 
   to delete the line in the executable mode – dd
 
   :split /usr/share/some.file --- opens a new file in a new window
 
   :e /usr/share --- opens a directory (in a new buffer , no windows to mess around ) 
 
   :w filename Save changes to a file. If you don't specify a file name, Vim saves as the file name you were editing. For saving the file under a different name, specify the file name.
 
   :wq Write the file and exit.
 
   :q! exit without saving (the hyphen meaning is the same for all commands )
 
   : start folding 
   select block, then :fold
   zo - open
   zc - close
   : stop folding

2012-12-09

how-to add a host independant relative path to the @INC in perl

      BEGIN {
         # START add a host independant relative path to the @INC 
         my $cwd = "";
         # $1 is the basedir , $2 the dir separator , $3 the file name without the file ext , $4 the file ext
         $0 =~ m/^(.*)(\\|\/)(.*)\.([a-z]*)/;
         $cwd =~ s/\\/\//g;
         use Cwd 'abs_path';
         #resolve the run dir where this scripts is placed
         my $ScriptAbsolutPath = abs_path( $0 );
         #debug print "\$ScriptAbsolutPath is $ScriptAbsolutPath \n" ;
         $ScriptAbsolutPath =~ m/^(.*)(\\|\/)(.*)\.([a-z]*)/;
         # get the run of the current dir
         my $RunDir = $1;
         #change the \'s to /'s if we are on Windows
         $RunDir =~ s/\\/\//gi;
         # add the run dir 
         push( @INC, $RunDir);
         # split the string of the RunDir into parts , use the / as the delimiter
         my @DirParts = split( '/', $RunDir );
         # go 2 levels up from the cwd
         for ( my $count = 0; $count < 2; $count++ ) { pop @DirParts; }
         # resolve the product dir
         my $ProductDir = join( '/', @DirParts );
         # build the relative path for the lib dir 
         my $DirLibs = "$ProductDir/lib/perl/db" ; 
         # perldoc perlvar search for @INC
         push( @INC, $DirLibs) unless (grep {$_ eq $DirLibs} @INC) ; 
         #debug 
         print join ( "\ndir found in \@INC: \n" , @INC ) ;
         # STOP add a host independant relative path to the @INC 
      }   #eof BEGIN

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