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#deb cdrom:[Ubuntu 16.04.2 LTS _Xenial Xerus_ - Release amd64 (20170215.2)]/ xenial main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ xenial main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ xenial-updates main restricted

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#!/bin/bash

OUTPUT="$(xfconf-query -c xfce4-desktop -p '/desktop-icons/style' -a)"

if [  "$OUTPUT" -eq "0"  ]; then
    echo "Show Desktop icons"
	xfconf-query -c xfce4-desktop -np '/desktop-icons/style' -t 'int' -s '2'

elif [ "$OUTPUT" -eq "2" ];
then

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Remove 'com' substring from all lines

cat file.txt | sed 's/com//g' >newfile.txt

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/* This file is part of:
 *    Jalali, a Gregorian to Jalali and inverse date convertor
 * Copyright (C) 2001  Roozbeh Pournader <roozbeh@sharif.edu>
 * Copyright (C) 2001  Mohammad Toossi <mohammad@bamdad.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 

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Install bicon

pre-request

sudo apt install libfribidi0 libfribidi-dev

Download, exctract, install

behad bicon

`./autogen.sh ./configure

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echo "salam samad dasads"|grep -o "a"|wc -l

C

	char str[]="aaaHello world";
	int a = 0;
	
	int i=0;

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lsb_release -a

uname -a

screenfetch

hostnamectl

cat /etc/os-release

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Printable ASCII charackters

awk 'BEGIN{for( i=32; i<=126;i++) printf "%c",i }'

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#!/bin/bash

# usage ./mdia_suration.sh $(pwd) mp4

len=0;
for f in $1/*.$2; do   
	echo -ne "$f\t";   
	dur=`ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$f"`;
	number=`echo "$dur/1" | bc`;
	printf '%dh:%dm:%ds\n\n' $(($number/3600)) $(($number%3600/60)) $(($number%60))

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Remove old version

sudo apt purge libreoffice

sudo mv ~/.config/libreoffice/ ~/.config/libreoffice-back/

download latest version

https://www.libreoffice.org/download/download/?type=deb-x86_64&version=6.4.1&lang=en-US

extract

tar -xf LibreOffice_6.4.1_Linux_x86-64_deb.tar.gz