tools

tools/extract_pdf_image

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+#!/bin/bash
+
+
+usage(){
+	echo "Usage: $(basename "$0") <PAGE|[START]-[END]> <FILE.pdf> [FOLDER|PREFIX]"
+}
+
+[[ $# -lt 2 ]] && usage && exit 2
+
+PAGE=$1
+PDF=$2
+DEST=${3:-.}
+
+[[ ! -f "$PDF" ]] && echo "FAILURE: File <$PDF> not found!" && exit 3
+file -bi "$PDF" | grep -q "application/pdf"
+[[ $? -ne 0 ]] && echo "FAILURE: File <$PDF> not detected as a valid application/pdf document!" && exit 3
+
+if [[ -d $DEST ]];  then
+	DEST="$DEST/extract"
+fi
+
+if [[ "$PAGE" == *-* ]]; then
+	START=$(echo "$PAGE" | cut -d '-' -f1)
+	START=${START:-1}
+	PAGINATION="-f $START"
+	
+	END=$(echo "$PAGE" | cut -d '-' -f2)
+	if [[ ! -z $END ]]; then
+		PAGINATION="$PAGINATION -l $END"
+	fi
+else
+	PAGINATION="-f $PAGE -l $PAGE"
+fi
+
+pdftoppm -jpeg $PAGINATION "$PDF" "$DEST"

tools/internet_check

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+#!/bin/bash
+
+if ping -c1 1.1.1.1 2>&1 >/dev/null; then
+    connectivity=true
+else
+    connectivity=false
+fi
+echo "connectivity=$connectivity"
+
+if ping -c1 google.fr 2>&1 >/dev/null; then
+    dns=true
+else
+    dns=false
+fi
+echo "dns=$dns"
+
+if nmcli device status | grep -E "^wl" | grep -q connected; then
+    wifi=true
+else
+    wifi=false
+fi
+echo "wifi=$wifi"

tools/ip-lan-detect

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+#!/bin/bash
+
+nmap -sn `ip route | tail -1 | cut -d ' ' -f1` | sed -n 'n;p' | cut -c 22- | head -n -1 | awk '{tmp=$1; $1=$2; $2=tmp; gsub("\\(","",$1); gsub("\\)","",$1); printf "%-15s %s\n", $1, $2}' | sed 's/^ *//'
+
+# sed -n 'n;p' =>  FILTER odd lines
+# awk '{tmp=$1; $1=$2; $2=tmp; gsub("\\(","",$1); gsub("\\)","",$1); printf "%-15s %s\n", $1, $2}' => SWAP words and remove parenthesis
+# sed 's/^ *//' => REMOVE starting spaced

tools/pgrep2

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+#!/bin/bash
+# Colorized pgrep
+
+arg1="$1"
+
+
+if [[ $arg1 = *"grep"* ]];then
+	# remote the grep command itself from process list!
+	ps -eo pid,ppid,uname:20,cmd | grep -v $$ | grep --color=auto "$arg1"
+else
+	ps -eo pid,ppid,uname:20,cmd | grep -v 'grep' | grep --color=auto "$arg1"
+fi

tools/shrinkpdf

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+#!/bin/sh
+
+# http://www.alfredklomp.com/programming/shrinkpdf
+# Licensed under the 3-clause BSD license:
+#
+# Copyright (c) 2014, Alfred Klomp
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+# 1. Redistributions of source code must retain the above copyright notice,
+#    this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+# 3. Neither the name of the copyright holder nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+
+shrink ()
+{
+	gs					\
+	  -q -dNOPAUSE -dBATCH -dSAFER		\
+	  -sDEVICE=pdfwrite			\
+	  -dCompatibilityLevel=1.3		\
+	  -dPDFSETTINGS=/screen			\
+	  -dEmbedAllFonts=true			\
+	  -dSubsetFonts=true			\
+	  -dAutoRotatePages=/None		\
+	  -dColorImageDownsampleType=/Bicubic	\
+	  -dColorImageResolution=$3		\
+	  -dGrayImageDownsampleType=/Bicubic	\
+	  -dGrayImageResolution=$3		\
+	  -dMonoImageDownsampleType=/Bicubic	\
+	  -dMonoImageResolution=$3		\
+	  -sOutputFile="$2"			\
+	  "$1"
+}
+
+check_smaller ()
+{
+	# If $1 and $2 are regular files, we can compare file sizes to
+	# see if we succeeded in shrinking. If not, we copy $1 over $2:
+	if [ ! -f "$1" -o ! -f "$2" ]; then
+		return 0;
+	fi
+	ISIZE="$(echo $(wc -c "$1") | cut -f1 -d\ )"
+	OSIZE="$(echo $(wc -c "$2") | cut -f1 -d\ )"
+	if [ "$ISIZE" -lt "$OSIZE" ]; then
+		echo "Input smaller than output, doing straight copy" >&2
+		cp "$1" "$2"
+	fi
+}
+
+usage ()
+{
+	echo "Reduces PDF filesize by lossy recompressing with Ghostscript."
+	echo "Not guaranteed to succeed, but usually works."
+	echo "  Usage: $1 infile [outfile] [resolution_in_dpi]"
+}
+
+IFILE="$1"
+
+# Need an input file:
+if [ -z "$IFILE" ]; then
+	usage "$0"
+	exit 1
+fi
+
+# Output filename defaults to "-" (stdout) unless given:
+if [ ! -z "$2" ]; then
+	OFILE="$2"
+else
+	OFILE="-"
+fi
+
+# Output resolution defaults to 72 unless given:
+if [ ! -z "$3" ]; then
+	res="$3"
+else
+	res="72"
+fi
+
+shrink "$IFILE" "$OFILE" "$res" || exit $?
+
+check_smaller "$IFILE" "$OFILE"