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Afiseaza wallpaperul X11 cu xv E-mail
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Scris de Cypress   
Thursday, 22 November 2007
#!/bin/bash
##########################################################################
# Title      :    getpic - background picture for X11 with xv
# Author     :    Heiner Steven ( Aceasta adresa e-mail este protejata impotriva spamului, JavaScript trebuie activat pentru a putea vizualiza pagina. )
#        (based on a script by Aceasta adresa e-mail este protejata impotriva spamului, JavaScript trebuie activat pentru a putea vizualiza pagina. )
# Date       :    1995-03-07
# Requires   :    cfcat, rand
# Category   :    Desktop
# SCCS-Id.   :    @(#) getpic    2.1 04/03/12
##########################################################################
# Description
#    Prints name of a background image
##########################################################################

PN=`basename "$0"`            # program name
VER='2.1'

: ${GREP:=egrep}

# Directories to search for pictures
: ${PICDIRS:="$HOME/pictures:/export/pictures:/usr/local/pictures"}
: ${PICEXCL:=$HOME/.picexclude}        # exclude list
: ${PICDEF:=`cfcat $HOME/.picdefault 2>/dev/null`}    # Default image

usage () {
    echo >&2 "$PN - print name of a background picture, $VER
usage: $PN [picture|pattern]

If no picture is specified, one is chosen randomly. Otherwise a picture
is chosen randomly chosen from all files matching the specified pattern.

Environment variables:
    Directory to search
       for pictures: PICDIRS=$PICDIRS
    Pictures to exclude: PICEXCL=$PICEXCL
    Name of default picture: PICDEV=$PICDEF"
    exit 1
}

msg () {
    for i
    do echo "$PN: $i" >&2
    done
}

fatal () { msg "$@"; exit 1; }

while [ $# -gt 0 ]
do
    case "$1" in
    --)    shift; break;;
    -h)    usage;;
    -*)    usage;;
    *)    break;;            # First file name
    esac
    shift
done

[ -f "$PICEXCL" ] || > $PICEXCL
[ -f "$PICDEF" ] || echo "# default picture for $PN" > $HOME/.picdefault

Pic=$PICDEF
PicList=${TMPDIR:=/tmp}/gp$$.l
Tmp=$TMPDIR/gp$$.t
 
# Remove temporary file at exit or interrupt
trap 'rm -f "$PicList" "$Tmp" > /dev/null 2>&1' 0
trap "exit 2" 1 2 3 15

# Create picture list and return count
for dir in `echo "$PICDIRS" | tr : ' '`
do
    find "$dir" -type f -print 2>/dev/null |
    fgrep -v -f "$PICEXCL"
done > "$PicList"

if [ $# -gt 0 ]
then                    # try to get specified picture
    # Select the matching pictures
    "$GREP" "$1" "$PicList" > "$Tmp" && mv "$Tmp" "$PicList" || exit 1
fi

# Count images (lines), remove leading blanks
n=`echo \`wc -l < "$PicList"\``
if [ ${n:=0} -gt 0 ]
then                    # randomly select picture
    # Randomly choose one picture
    k=`rand "$n"`
    Pic=`sed -ne "${k}{p;q;}" "$PicList"`
    if [ -r "$Pic" ]
    then
    msg "selected #$k of $n pictures: $Pic"
    else
        msg "could not read file $Pic - using default"
        Pic=$PICDEF
    fi
fi

[ -z "$Pic" ] && fatal "could not determine picture"

cat <<EOT
$Pic
EOT

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Copyright (C) 2007 Alain Georgette / Copyright (C) 2006 Frantisek Hliva. All rights reserved.
 

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Tips & Tricks

Foloseste aceeasi partitie SWAP in Linux si Windows
Daca esti in lipsa de spatiu si doresti sa folosesti aceeasi partitie swap si in Linux si in Windows, poti sa faci urmatorul truc:
1. Formateaza partitia ca si partitie DOS si creaza fisierul SWAP Windows pe ea, dar nu rula inca sistemul de operare.
2. Booteaza in Linux si s alveaza partitia intr-un fisier. Presupunand ca partitia swap se afla pe /dev/hda5, vom face
dd if=/dev/hda5 of=/etc/dosswap
3. Comprima fisierul dosswap:
gzip -9 /etc/dosswap
4. Adauga urmatoarele in fisierul /etc/rc pentru a pregati si instala swap-ul in Linux. XXXXX este numarul de blocuri din partitia swap:
mkswap /dev/hda5 XXXXX
swapon -av   
5. Adauga partitia in /etc/fstab
 

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