Debianuel Notes on a linux experience. Emmanuel Branlard

Transcription

1 Debianuel Notes on a linux experience Emmanuel Branlard June 2011

2 Contents I Notes on linux 7 1 Unix commands Commands Vi Vim or gvim Vim-latex Grep - List of my REGEXP FORLOOPS/ FIND / XARGS and SPACECHARACTERS TEST TEST - COMPOUND STANDARD IN, STANDARD OUT Shell AWK DU and DF APPPLICATIONS Equalize MP3 using mp3 gain xls2csv PDF password - password crack - pdfcrack - bypass - print by keeping CR Google Earth R - Bypass user le Iceweasel Soud problem Custom letypes in geany Indexation - Search in pdf OCR Text recognition and searchable PDF Antivirus for linux- ClamAV - freshclam Install Microsoft Oce Mount.bin/.cue - convert them to.iso pdf2png - pdftopng Fuseiso - Monter iso facilement- thunar shortcut Meld : File/Folder comparison- thunar shortcut Catsh : Find les- thunar shortcut Java - iceweasel debian - Network problem Matlab : Ajouter un repertoire dans la variable PATH Snapshot - Capture d'ecran FOR LOOPS/ FIND / XARGS and SPACE CHARACTERS -> Find in PDF Iceweasel / Firefox et java plugin VISIO Firefox / iceweasel slow, tweak it PDF Croping - suppression d'espace de marges

3 CONTENTS 2.25 Renommage massif unix Faire un dictionaire - Compter le nombre de keywords d'une page web Aspirer un site avec wget Modication pdf - Avec le paquet pdftk Manipulation d'images en masse : image magick Evince cannot open any pdf documents anymore Audio format conversion : ogg, au, mp3, wav, snd,ai dos2unix : package tofrodos Vim en color Listen ou Exaile ou Quod libet ou banshee ou xrmms pour remplacer Amarok WICD pour remplacer Gnome Netwok Manager Installer un nouveau pager : most Gparted equivalent Congure skype sound Logiciels equivalent linux / windows Personaliser xterm Hacker xterm - source code Congurer Geany Telecharger les jaquettes des pistes de la liste de lecture d'amarok dans leur dossier Latex et packages Latex et windows RAW photo images nikon.nef split view, gestionnaire de fenetre a gauche a droite, avec compiz Xorg - clavier souris touchpad Bien lire le log Xorg Xorg ou/et HAL Numlockx conicting X11 working x11 without hald/dbus Ctrl alt Backspace to restart X server QWERTY et accents Get keyboard keycodes Cong souris logitech lx8 left handed Mise en veille et hibernation qui chie, avec cartes Nvidia Monitor going to sleep after 10 minutes - Power management XFCE - xfce Cleaning up Xfce menu - applications wine Understanding Mimetypes Command for Toggle Desktop Notications Thunar - User customed actions Astuce XFCE : transparent background for panel Astuce XFCE : Handle acpi event for power button, show Xfce logout options Xubuntu et programme au demarrage de session Se passer de keytouch - utiliser xfce xfce shortcuts are stored in Equivalent win split revolution avec wmctrl - raccourcis clavier xfce Applications pour environnement xfce sans dependances gnome ou kde Astuce XFCE : How to include all application while switching windows E. Branlard 2

4 CONTENTS 5 SYSTEM Password protect single user mode Turn o php expose Heure machine exacted - NTP daemon Increase password strencgth with PAM cracklib or passwdqc Init Boot sequence messages in color - [ok] Default User directories Nettoyage des log automatique Une systeme plus reactif Swappiness Optimisation - Date de modif Readahead Informations systeme Addressse MAC Journaux systemes - bootlog Bootchart Add a path to locate ANSI Escape sequences - escape codes for bashrc and login Geeking around with the login prompt - Customization A quiet boot with color-coded error messages in Debian Utiliser aptitude Bien maitriser ses paquets - application a nvidia Command to reload fstab Changer le nom de votre machine, hostname Rendre clef USB amorcable - partitions, formatage, bootable Migrer de Ext3 a Ext Comment savoir si on est 32 ou 64bits Exécuter plusieurs versions de Debian avec chroot Probleme d'heure Script automatique au demarrage Bip systeme - tab - arret systeme Congurer son reseau a la main Conversion UTF8 ISO Initramfs Restaurer une installation Debian Accents, caracteres accentues, font terminal amarok Congurer sudoers Eteindre / redemarrer : droits utilisateur Son muet au demarrage Demarrage - gestionnaire de connexion - autologin Demarrage - gestionnaire de connexion - auto-startx - autostartx Autologin, fenetre de connexion sans gdm FILESYSTEMS, UTILISATEURS, GROUPES, DROITS Les droits d'endossement SetUID et SetGID Begin:waiting for resume on startup, resume process Forcer le montage en ecriture d'une partition ntfs apres un mauvais demontage de windows Disque externe en lecture seule Utilisateurs et groupes Droits partage dossier chiers org.freedesktop.hal.storage E. Branlard 3

5 CONTENTS 7 Grub, dual-boot, MBR Grub Installer grub dans le MBR Installer un dual boot avec Vista, sans utiliser le MBR WIFI Congurer ma carte wi bcm4310, broadcom Fluxbox et wi Cracker wi WAP Cracker wi WEP Monitor mode for wi usb key : TL-WN321G chipset Ralink rt WIFI, et GESTIONNAIRE DE TROUSSEAU SERVERS - PHP SQL APACHE SAMBA FTP SSH Free shell servers Debian Serveur Video surveillance - Zone minder Telnet Creer une base de donnees sql pour amarok PHP mysql et apache sous ubuntu Apache - probleme de liens symbolic Aide server apache - les bases Aide server apache - l'autoindex et le probleme de php Aide server apache - protection par mot de passe iptables Server FTP DynDNS Voisimage reseau : pyneighborhood Samba fusesmb pyneighborhood Communiquer avec les reseaux microsoft Activation du voisinage réseau Windows dans Thunar fusemb OTHERS Lire wmv windows media video? Java Gcj versus Sun - select defaults JVM Script shell -Command FIND - manipulation album cover le Connexion ssh avec mot de passe automatique, methode bourrin mot de passe en clair Nvidia drivers Timidity is not yet congured Midi FFMPEG et MP3 lame sous debian Create from template Probleme gnome barre verticale - liste de fenetres Mot de passe mise en veille NetworkManager - wi au reveil apres mise en veille ou hibernation Histoire de memoire vive detectee Virer le Usplash splash screen demarrage ubuntu Optimisation - Preload Optimisation - Démarrer les applications plus rapidement avec Prelink Optimisation - Suppression services Optimisation - Cong reseau demarrage Optimisation - chargement polices E. Branlard 4

6 CONTENTS 10.20Open oce optimization Optimisation Debian - conseil II Supplementary notes Conguration Files /.bashrc /.bash_prole /.xinitrc /.xsession /.Xdefaults /.vimrc /.conkyrc /etc/apt/sources.list /etc/apt/preferences Shell scripts pm-inhibit.py pdfautorename alarmaniac pdfocr backupsyst shrinkfig topdf xsetnumlock.c ifort-setup convertEnc xfce4ToggleDesktop keywordsSetUp pdfocr-tess GETAPTKEY rhythmboxstart rhythmboxstartlong showTag terms ECN-RenameByTitle.sh compilWebVersion formatWebVersion audioInfo unix2win svg2png toCover texclean DEFAULT shrinkFig tomp pdfBind DoBootchart cnx-vjk.expect pdfAlternRotation syncStorage E. Branlard 5

7 CONTENTS 12.35pdfFind Debian Install Debian from scratch Program list Fluxbox Install Debian with Fluxbox Notes on Fluxbox Tuning Fluxbox Appearence Languages and programs Unix Awk Vim Language C Makeles Fortran Latex Kernel compilation 174 E. Branlard 6

8 Part I Notes on linux 7

9 Chapter 1 Unix commands 1.1 Commands * sort Sorts l i n e s in ascending, descending and unique order * grep Searches for regular expressions in s t r i n g s or f i l e s * basename Strips the path from a path s t r i n g to leave j u s t the filename * dirname Removes the f i l e from a path s t r i n g to leave j u s t the pathname * cut Chops up a text s t r i n g by characters or f i e l d s * wc Count the characters, words, or l i n e s * [ ( test ) ] Predicate or conditional processor * tr 'a ' 'b ' Transform characters * expr Simple arithmetic processor * bc Basic Calculator * eval Evaluate v a r i a b l e s * echo Output s t r i n g s * date Create date s t r i n g s * nawk Manipulate text s t r i n g s * head t a i l Access l i n e s in f i l e s 1.2 Vi Vim or gvim %%%Motions : h j k l 0 $ s i m u l t i l i g n e s : u t i l i s e r gk gj g$ g0 n : go to l i n e CTRL B CTRL F : page backwards page forwrd CTRL U CTRL D : h a l f page up h a l f page down w b : next/previous word z. : place cursor in the middle %%% Basic <C r> : redo!!! u U : undo %%% I n s e r t i o n s ( ne pas se l i m i t e r a i!!! ) a i o A I O 8

10 CHAPTER 1. UNIX COMMANDS %%% Deletion x dd di } : d e l e t e everything t i l l the next matching } dt} : same but does not d e l e t e the } D or d$ : d e l e t e t i l l end of l i n e $ %%% Programming % go to next brace zo : open folded code z f in verbose mode to f o l d zr : unfold a l l l e v e l s < > : indent, use. to repeat >>< << : indent ] p : l i k e p but adjusts indent %%% Block s t u f f (don ' t know proper term ) vi } : select everything between braces ( same as vi {) va} : idem but includes braces yi } : copy content between braces c i } ct } %%% Remplacement r cw : pour changer un mot %%% Copy paste cut p : put a f t e r P : put before yy p : copy paste one l i n e dd p : cut paste one l i n e v y P : select copy paste %%% Marks ( u s e f u l l when copying smthg f a r away) ma : mark 'a ', not a command no : ` a : go to a %%% Search and replace / : search, moving with n and N : s/aa/bb/g : a l l in current l i n e :%s/aa/bb/g : in a l l document : l1, l 2 s /aa/bb/g : a l l between l1 and l2 : set hlsearch : nohlsearch %%% Buffers All f i l e s open in vim are l i s t e d as b u f f e r s. They can be opened, in tab or windows, i t doesnt matter. This means that at any time you can a c c e s s any b u f fer and put i t in a tab or a window : l s : l i s t : bn : b number : go to buffer number E. Branlard 9

11 CHAPTER 1. UNIX COMMANDS : bd : c l o s e s current b u ffer %%%. Vimrc f i l e : so % : source the f i l e you are e d i t i n g. i f it ' s. vimrc, then config i s reloaded automatically %%% Windows : sp : opens in a s p l i t window <C W> s : s p l i t s h o r i z o n t a l l y <C W> v : s p l i t s v e r t i c a l l y <C W> w : loop through windows <C W> j k h l : move between windows <C W> _ : maximize window <C W> c : c l o s e window %%% Tabs : tabnew : new tab : tabe : open a f i l e in a new tab : tabc : tabn or gt : next tab : tabn or gt : previous tab "+y et "+gp ou "+gp copie entre documents???? %%% INSERT mode CTRL+C CTRL+[ or ESC to escape CTRL+N CTRL+P : Word/ variable /command completion!!! CTRL+H : backspace LOOK at my vimrc f o r my I n s e r t s e t t i n g s %%% Recording qa record a macro in recording a q stops : repeat recording %%% Paragraph reformating set textwidth=80 0 to cancel gqap : current paragraph gggqg : a l l paragraphs in f i l e J : j o i n with l i n e below ; whole f i l e : use cmd paste renter : s p l i t Vim-latex < >: press CTRL J to go to %%% Latex in i n s e r t mode %environments EIF : i n s e r t f i g u r e EIT : itemize then <A I> for items % maths s t u f f s ` / : f r a c E. Branlard 10

12 CHAPTER 1. UNIX COMMANDS ` I : int <A L> a f t e r of before a parenthesis, completes i t with \ l e f t... %%% References and c i t a t i o n s completion with <F9>!!! %%% LATEX VISUAL mode `{ puts \ l e f t { around s e l e c t i o n `( %%% Bib f i l e s BBB : new entry 1.4 Grep - List of my REGEXP Basics options : r : r e c u r s i v e in f o l d e r s color=auto : for better display I : ignore binary f i l e s E : w i l l i n t e r p r e t the pattern as an extended regexp F : w i l l i n t e r p r e t the pattern as a fixed s t r i n g i : ignore case n : l i n e number s : remove error messages I n r s i s I r n i grep r I color=auto pattern. /* Geany : nhiif %%% Regexp Remember :. : match one unique char, does not depend on what i s b e f o r e * : zero, one or s e v e r a l times what i s before? : zero or one time + : one time or more (),n} : n times () {m, n} : between m and n %Dates : echo " " grep E " ( ) [0 9]{2}" %Extensions 3 4 characters echo " sdf. png" grep E " [. ] [ a za Z]{3,4} $" %f i l e name ugly echo " s d f l_d s é f k l k f. ds f s k f j s " grep E " ^[a Z0 9\_ ]* [. ] " filename = ${ f %.*} E. Branlard 11

13 CHAPTER 1. UNIX COMMANDS 1.5 FORLOOPS/ FIND / XARGS and SPACECHARACTERS #! /bin /bash echo "Looking f o r "$1 SAVEIFS=$IFS IFS=$( echo en "\n\b" ) for i in ` find name "*. pdf" printf '%h/%f \n ' 2> /dev/null ` do echo " " echo "$ i " ; echo " " pdftotext $ i grep color=always $1 # s t r i n g s "$ i " grep $1 done ; IFS=$SAVEIFS 1.6 TEST Look at Compound! %%% String i s empty [ z ${var} ] Conditionnals t e s t s are in bracket [ ] See man test for d e t a i l s, l i k e : Expression comparison :! EX1 a Ex2, Ex1 o Ex2 String comp : S1 = S2, S1!=S2 Int comp : I1 ne I2 IF : i f [ ] [ ] && [ ] ; then... ; e l i f [ ] ; then... ; else... ; f i WARNING!! you need spaces around [ and =!!!!!!!!!! 1.7 TEST - COMPOUND %%% String matching [ [ "abc def. d, x " == a [ abc ] *\?d* ] ] ; echo $? 1.8 STANDARD IN, STANDARD OUT : PIPE. /compile_astra 2>&1 tee log. log 1.9 Shell E. Branlard 12

14 CHAPTER 1. UNIX COMMANDS extension = ${ f#*.} filename = ${ f %.*} %%% l o c a t i o n for local s c r i p t s % i f local p a r t i t i o n ( /usr / local /bin ) % or in. bash_p r o f i l e PATH=$PATH: /home/manu/ s c r i p t s / 1.10 AWK awk i s a pattern scanning and processing language. By default i t reads standard input and writes standard output. Usage : awk f p r o g f i l e [ ] f i l e Usage : awk ' program ' f i l e Usage :. / awkfscript F, : f i e l d separator comma(, ) F " ; " : f i e l d separator semicolumn ( ; ) F " ;, " : f i e l d separator semicolumn or comma ( ; ) #f i r s t 1000 l i n e s awk 'NR<1000 { print } ' r a d i a l. ini >radi #l i g n e s paires NR % 2 == 1 { print $0 } #a f f i c h e l e numero de l i g n e { print NR, $0 } # First three f i e l d s awk F, 'NR>1 { print $1, $2, $ 3;} ' tab. csv > tab2 # Not matching a pattern awk '! / Distribution / { print $0 } ' d r i f t. in # Cut a l i n e every 20 f i e l d s awk F, '{ for ( i =1; i<=nf; i=i +1){ i f (( i %20)==0 ) { printf $ i " ;\ n" } else { printf $ i " ; "} } printf "\n" } ' p. csv >r. csv # print sum of f i r s t record awk '{ sum += $1 }; END { print sum } ' f i l e awk F= 'NR<10 { for ( i =1; i<=nf; i++){ printf $ i "=" }; print "" } ' d r i f t. in #p r i n t f "&NEWRUN\n D i s t r i b u t i o n ='$bunchdir /$3 '\n" tee $2>/dev/ n u l l E. Branlard 13

15 CHAPTER 1. UNIX COMMANDS #awk 'BEGIN{IGNORECASE=1; FS=", ="}; / d i s t r i b u t i o n /{ for ( i =1; i<nf; i=i +2){ i f ($ i~/ d i s t r i b u t i o n /) {} e l s e { print " ", $i,"=",$( i +1)} } } NR>1 &&! / d i s t r i b u t i o n /{ print } ' $ casedir /$2 > $tempbuffer #cat $tempbuffer tee a $2>/dev/ n u l l awk 'BEGIN{IGNORECASE=1; FS=", =" }; / d i s t r i b u t i o n /{ for ( i =1; i<nf; i=i +2){ i f ( $ i~/ d i s t r i b u t i o n /) { s p l i t (ARGV[ 2 ], a, "=" ) ; print a [1]= a [ 2 ; ] } else { print " ", $i, "=", $( i +1)} } } NR>1 &&! / d i s t r i b u t i o n /{ print } ' $ c a s e d ir /$2 Distribution =\'$bunchdir /$3\'> $2 #! /bin /awk BEGIN { IGNORECASE=1 FS=", =" s p l i t (ARGV[ 2 ], a, "=" ) ; b=tolower ( a [ 1 ] ) } $0 ~ b { for ( i =1; i<nf; i=i +2){ i f ( $ i~b) { s p l i t (ARGV[ 2 ], a, "=" ) ; print " ", a [ 1 ], "=", a [ 2 ] ; } else { gsub ( " ", "", $ i ) ; print " ", $i, "=", $( i +1)} } } $0!~ b { print } 1.11 DU and DF %%%DU du sh FOLDER/FILE : disk u t i l i s a t i o n, readable by human, s : include subfolders the above w i l l return the t o t a l #l i s t i n g space used by the s u b f o l d e r s in the current f o l d e r a l i a s duf='du max depth=1 h ' %%%DF df al : disk space a l i a s df =' df ht egrep i " f i l e ^ /" ' E. Branlard 14

16 Chapter 2 APPPLICATIONS 2.1 Equalize MP3 using mp3 gain find. name ' *.mp3' exec mp3gain r k {} \; #But f i r s t, to hceck l e v e l without doing anything run : find. name ' *.mp3' exec mp3gain s s {} \; 2.2 xls2csv command among other tool from package " catdoc " 2.3 PDF password - password crack - pdfcrack - bypass - print by keeping CR ## Encrypting info pdfinfo ## First try g h o s t s c r i p t ( i f read access but no modif ) gs q dnopause dbatch sdevice=p d f w r i t e soutputfile=unencrypted. pdf c. setpdfwrite f crypted. pdf ## For brute force cracking : pdfcrack f i l e. pdf o pdfcrack f i l e. pdf o c ` cat a s c i i l i s t. txt ` 2.4 Google Earth sudo aptitude i n s t a l l googleearth package make googleearth package sudo dpkg i googleearth_ _i386. deb 15

17 CHAPTER 2. APPPLICATIONS 2.5 R - Bypass user le R no i n i t f i l e 2.6 Iceweasel Soud problem %%%# Introduction The problem comes when s e v e r a l a p p l i c a t i o n s try to access the sound device d i r e c t l y. I f a mixer i s used in between the application and the hardware, then there should be no problem Pulseaudio does t h i s mixing job, and thus, allow playing of s e v e r a l a p p l i c a t i o n s at the same time. Pulseaudio, s t a r t s by default, i f c a l l e d properlly by the application. So let ' s try with pulseaudio which i s now default in debian and ubuntu. Several people remove pulseaudio and don ' t have trouble... well, let ' s take the challenge. # Firefox / Iceweasel /Flash player vlc & rhythmbox together, no problem, they c a l l pulseaudio. The problem comes from iceweasel or maybe j u s t the f l a s h p l u g i n which try to access the sound device d i r e c t l y. I f pulseaudio i s c a l l e d f i r s t, then iceweasel does not have access to the card /dev/snd/*. I f iceweasel i s c a l l e d f i r s t and then pulseaudio, it ' s pulseaudio that can ' t access the card. To see who i s using what : l s o f w egrep ' snd dsp ' Use t h i s command e x t e n s i v e l y to debug : i f you see that f i r e f o x bin uses / dev/snd/* then, i t w i l l obviously not work. The only one that should use i t i s pulseaudio! %%% The s o l u t i o n that worked for me: #( Step 0: As I was q u i t e uncertain of my l a s t i n s t a l l of f l a s h p l a y e r, I did a clean i n s t a l l, but t h i s i s not necessary Purged flashplugin nonfree * Removed ~/. mozilla / plugins / f l a s h p l u g i n *. so ( not sure about the name anymore ) l o c a t e f l a s h p l u g i n * to see i f everuthing was purged c o r r e c t l y i n s t a l l flashplugin nonfree and that ' s a l l ) #Step 1 : i n s t a l l a l l the pulseaudio s t u f f : sudo aptitude i n s t a l l pulseaudio libao4 libpulse mainloop glib0 pulseaudio module j a c k pulseaudio module hal pulseaudio module x11 gstreamer0.10 pulseaudio pulseaudio u t i l s libasound2 plugins libpulse browse0 pulseaudio esound compat l i b p u l s e 0 I f you want to use bluetooth : pulseaudio module bluetooth E. Branlard 16

18 CHAPTER 2. APPPLICATIONS I f you want to use some v i s u a l i n t e r f a c e s t u f f : pavumeter paprefs pavucontrol!!! PAVUCONTROL i s r e a l l y good. For instance, for recording audio card flux. Launch recording with audacity. then in pavucontrol /recording change i n t e r n a l to monitor in the audacity l i n e. #Step 2: Tell ALSA a p p l i c a t i o n s to use a " pulse " device. Create /Edit f i l e ~/. asoundrc ( or /etc /asound. conf ) with the following content : pcm. pulse { type pulse } c t l. pulse { type pulse } pcm.! default { type pulse } c t l.! default { type pulse } This w i l l create a pseudo device c a l l e d " pulse " that w i l l be used by default by ALSA a p p l i c a t i o n s #Step3 : Make sure you have pcm( mixing ) volume none z e r o In terminal you can use alsamixer ( I had to use the option c 0) or aumixer, or probably the p u l s e audio commandline pacmd. or whatever volume mixer i n t e r f a c e l i k e xfce4 mixer, or the pulse audio one i f you i n s t a l l e d i t. #Step4 : Test K i l l a l l a p p l i c a t i o n s using sound, including pulseaudio. The command l s o f w egrep ' snd dsp ' should return nothing. Do some t e s t i n g. Hopefully you should be able to have youtube / vlc / rhythmbox working a l l t o g e t h e r at the same time for a good cachophony. %%% In the f i l e /etc / iceweasel / iceweaselrc, replace the l i n e ICEWEASEL_DSP=" none" by ICEWEASEL_DSP=" aoss " aoss i s a simple wrapper s c r i p t which f a c i l i t a t e s the use of the ALSA OSS compatibility l i b r a r y. To i n s t a l l i t : root@localhost : ~#apt get i n s t a l l alsa oss E. Branlard 17

19 CHAPTER 2. APPPLICATIONS Does i t work?? 2.7 Custom letypes in geany # to make i t r e a l l y custon, you need to comnpile one... Otherwise use an e x i s t i n g parser ( perl C, LaTeX) and customize i t # First step launch Geany, Tool>>Configuration Add the l i n e Bib=*. bib ; f i l e s >>f i l e t y p e_extensions. conf and saved in ~/. config /geany/ f i l e t y p e_extensions. conf cp /usr /share /geany/ f i l e t y p e s. latex /home/manu/. config /geany/ f i l e t y p e s. bib. conf 2.8 Indexation - Search in pdf # swish++ appear as a good solution, i t i s configurable via a. conf f i l e instead of using a conf f i l e, one can use do i t manually convert a l l pdf to txt via pdftotext then index them with index++ then search with search++ # Use tracker... it ' s e a s i e r and more complete tracker control s : To launch the indexing : tracker p references : for options tracker search tool : for graphical i n t e r f a c e tracker search bla : command l i n e search tracker search t bla : search in documents 2.9 OCR Text recognition and searchable PDF Idea : s p l i t t i n g pdf converting to good image format (1bpp ) use an OCR tool to create hocr data ( html OCR) use hocr2pdf to put the t e x t data i n t o the pdf combine the pdf ( using pdfjoin from pdfjam ) %%% Step by step t o o l s # pdftk # pdf2ppm # Creating hocr f i l e s from images t e s s e r a c t ( you need version 3 not 2.04 as in Debian see below ) E. Branlard 18

20 CHAPTER 2. APPPLICATIONS cuneiform cuneiform l language f hocr o output. hocr i n f i l e.ppm # hocr2pdf : puts hocr data into the pdf ( behind images ) hocr2pdf comes with exactimage i i n p u t f i l e o output pdf n : no image, allows to skip the image normally shadowing the text to e i t h e r save storage space or take a look how exactly the glyphs are positioned. s : sloppy text can improve copy paste text example : hocr2pdf i scan. t i f f s o test. pdf < cuneiform out. hocr %%% Tools / s c r i p t s to do i t gkovacs pdfocr ( https : //github. com/gkovacs /pdfocr ) pdf2ocr ( http : //blog. konradvoelkel. de/2010/01/linux ocr and pdf problem solved /) # watchocr i s a linux d i s t r i b u t i o n acting as server to do t h i s ( using ho cr2 pdf and cuneiform ) %%% Script 1 Using Tesseract 3 #! /bin /bash echo " usage : pdfocr. sh document. pdf \" author \" \" t i t l e \"" # Adapted from http : // blog. konradvoelkel. de /2010/01/linux ocr and pdf problem solved / # NOTE: This s c r i p t has been s u b s t a n t i a l l y modified / s i m p l i f i e d from the o r i g i n a l. # This version does not allow rotation, language s e l e c t i o n or cropping. # Those parameters were a l l required in the original, but I don ' t r e a l l y need them. # I f you can think of a way to make them optional, please share. # This version also uses Tesseract, which I find to be s u b s t a n t i a l l y more # accurate than Cuneiform for English t e x t. # usage examples : pdftk "$1" burst dont_ask for f in pg_*. pdf do echo "pre processing $ f... " convert quiet density 300 depth 8 "$ f " "$ f. t i f " echo no s p l i t t i n g done for f in pg_*. t i f do echo " processing $ f... " t e s s e r a c t "$ f " "$ f " hocr echo "Merging TIFF and hocr into PDF f i l e at 150 DPI... " #Downsample to cut down on f i l e b l o a t hocr2pdf r 150 i "$ f " o "$f ocr. pdf" <"$ f. t i f. html" done echo "InfoKey : Author" > in. i n f o E. Branlard 19