When middle click doesn't work in Vim

I mean the Linux feature to use mouse middle click to paste selected text. In vim(not gvim) it sometimes doesn't work. Here I post how to fix it.

In ~/.vimrc find line like

set mouse=a

and change it to

set mouse=r

That's it!

RPM for nethogs in openSUSE

Nethogs is a 'top' for network connections. It seems, RPMs are no longer supported(At least homepage links for RPM don't work). I had some troubles making an RPM for in in openSUSE. So I'd share a workaround for it.

Download lastest(for now) release tarball and uncompress it:

$ cd /tmp && wget 'http://sourceforge.net/projects/nethogs/files/nethogs/0.7/nethogs-0.7.0.tar.gz/download'
$ tar -xzvf nethogs-0.7.0.tar.gz

Now make

$ cd nethogs
$ make

You may try running

$ sudo checkinstall -R

but if you are at openSUSE box as me, you'd probably get error that says you didn't specify filename in
'install -d -m 755'... If so, edit ./Makefile:
1) find line:

sbin  := $(DESTDIR)/sbin

2) append the folliwing line after that:

bin  := $(DESTDIR)/bin

That's it! Yoy may now run

$ sudo checkinstall -R 

and follow checkinstall instuctions. Everything should be OK now.

Good luck.

UPDATE
You might have to install checkinstall:

$ sudo zipper in checkinstall

Create RPM from source in openSUSE easily. Checkinstall

Being new to openSUSE, I searched for a took "like" checkinstall in Debian. But
openSUSE already has it! :) I'll show how to use it.

Firstly, install it:

$ sudo zypper in checkinstall

Now the whole process mainly looks like the following.

$ ./configure && make
######################################################################
# or 
# qmake 
# or whatever appopriate before doing make install.
######################################################################
$ sudo /usr/sbin/checkinstall
######################################################################
# ... checkinstall advices some settings
######################################################################
$ rpm -i /path/to/generated/rpm

Now let's build an RPM for KeePassX password manager:

$ cd /tmp
$ mkdir keepasx
$ cd keepasx
$ svn co https://keepassx.svn.sourceforge.net/svnroot/keepassx/trunk
$ cd trunk
$ qmake

######################################################################
# To install qmake:
# $ sudo zypper in libqt4-devel
######################################################################
$ sudo /usr/sbin/checkinstall
######################################################################
# Now I had some problems with uncreated directories... Had to issue:
# $ sudo mkdir /usr/share/keepassx /usr/share/mimelnk
# and repeat 
# $ sudo /usr/sbin/checkinstall
######################################################################

Now checkinstall should generate file like

$ /usr/src/packages/RPMS/x86_64/keepassx-0.4.3-1.x86_64.rpm

So may now install the RPM normally:

$ sudo rpm -i /usr/src/packages/RPMS/x86_64/keepassx-0.4.3-1.x86_64.rpm

How to enable color prompt in byobu

Byobu sets $TERM environment variable to screen-bce, screen.linux, or something beginning with screen(at least currently in Ubuntu 10.10). And if you have your bash prompt normally colorized, it probably won't work in byobu without some changes in ~/.bashrc.

To enable color prompt in boybu find out what's the value of $TERM within byobu:

$ echo $TERM

screen-bce

Now in ~/.bashrc find lines like

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm*) color_prompt=yes;;

and append the following line there:

    screen*) color_prompt=yes;;

Then find lines like:

# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"

and change them to:

# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*|screen*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"

Here is my ~/.bashrc:

# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples

# If not running interactively, don't do anything
[ -z "$PS1" ] && return

# don't put duplicate lines in the history. See bash(1) for more options
# don't overwrite GNU Midnight Commander's setting of `ignorespace'.
#export HISTCONTROL=$HISTCONTROL${HISTCONTROL+,}ignoredups
# ... or force ignoredups and ignorespace
export HISTCONTROL=ignoreboth

# append to the history file, don't overwrite it
shopt -s histappend

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
export HISTSIZE=1000
export HISTFILESIZE=3000

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# make less more friendly for non-text input files, see lesspipe(1)
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm*) color_prompt=yes;;
    screen*) color_prompt=yes;;
esac

# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
#force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
 # We have color support; assume it's compliant with Ecma-48
 # (ISO/IEC-6429). (Lack of such support is extremely rare, and such
 # a case would tend to support setf rather than setaf.)
 color_prompt=yes
    else
 color_prompt=
    fi
fi
if [[ "$color_prompt" = yes && "$USER" = root ]]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]: \[\033[01;34m\]\w\[\033[00m\] \$ '
elif [[ "$color_prompt" = yes ]]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[00;33m\]\u@\h\[\033[00m\]: \[\033[01;34m\]\w\[\033[00m\] \$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w \$ '
fi
unset color_prompt force_color_prompt

# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*|screen*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac

# Alias definitions.
if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
fi

export EDITOR='vim'
export GREP_COLOR=';33'
#export PATH=$PATH:/usr/local/mysql/bin:/usr/local/mysql/sbin

Change wallpaper periodically in Ubuntu

Thanks to UbuntuForums.org, I made a simple cron job changing desktop wallpaper depending on time.

crontab

SHELL=/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
@hourly /share/scripts/bash/change_wallpaper.sh

change_wallpaper.sh

#!/bin/bash -
# Get the pid of nautilus
nautilus_pid=$(pgrep -u $LOGNAME -n nautilus)
# If nautilus isn't running, just exit silently
if [ -z "$nautilus_pid" ]; then
    exit 0
fi
# Grab the DBUS_SESSION_BUS_ADDRESS variable from nautilus's environment
eval $(tr '\0' '\n' < /proc/$nautilus_pid/environ | grep '^DBUS_SESSION_BUS_ADDRESS=')
# Check that we actually found it
if [ -z "$DBUS_SESSION_BUS_ADDRESS" ]; then
    echo "Failed to find bus address" >&2
    exit 1
fi
# export it so that child processes will inherit it
export DBUS_SESSION_BUS_ADDRESS
HOUR=$(date +%H)
PICDIR="/usr/share/backgrounds/"
#echo "HOUR: $HOUR"
#echo "PICDIR: $PICDIR"
case $HOUR in
21|22|23|00|01|02|03|04|05|06)
/usr/bin/gconftool-2 --type string --set  /desktop/gnome/background/picture_filename $PICDIR"NATURE-ZenLizard.png"
;;
12|13|14|15|16|17|18|19|20)
/usr/bin/gconftool-2 --type string --set  /desktop/gnome/background/picture_filename $PICDIR"Fern_by_aalex04.jpg" 
;;
09|10|11)
/usr/bin/gconftool-2 --type string --set  /desktop/gnome/background/picture_filename $PICDIR"Bon-Echo_wallpaper.jpg"
;;
*)
/usr/bin/gconftool-2 --type string --set  /desktop/gnome/background/picture_filename $PICDIR"Ropey_Photo_by_Bob_Farrell.jpg"
;;
esac

I wonder, why it didn't work without DBUS_SESSION_BUS_ADDRESS detection. However, it works now. I'd be glad, if it helps someone.

Simple CLI tool to escape HTML entities

Following scripts read content from stdin and output html-escaped string.

PHP

#!/usr/bin/env php
<?php
/* htmlescape.php */
echo str_replace("\n", "<br />\n", htmlspecialchars( file_get_contents('php://stdin')));
?>

Python

#!/usr/bin/python
# htmlescape.py
import cgi, sys
print cgi.escape(sys.stdin.read())

Usage

$ php htmlescape.php < file.html

or

$ python htmlescape.py < file.html

or for executables:

$ cat file.html | htmlescape.py
$ cat file.html | htmlescape.php

It also works like that:

$ ./htmlescape.py 
if (a > b && c < d) func();                                       
^D
if (a &gt; b &amp;&amp; c &lt; d) func();

^D is Ctrl+D shortcut.
I used it in writing this blog ;)

Copy SVN working copy changes to a folder

To copy changed files and folders to a temporary folder, I use the following bash script:

#!/bin/bash - 
#          FILE:  cpsvnst.sh
#         USAGE:  ./cpsvnst.sh source_dir destination_dir
#   DESCRIPTION:  Copy changed files and folders from SVN working copy to a temp. dir.
#        AUTHOR: Ruslan Osmanov 
#       CREATED: 11/25/2010 01:37:18 PM UZT

set -o nounset                              # Treat unset variables as an error

# Displays the message, usage info and exits with error code 1
function my_usage()
{
    msg=$1
    [[ $msg ]] && echo $msg
    echo "Usage:
    ./$0 source_dir destination_dir
    source_dir          Source directory
    destination_dir         Destination directory"
    exit 1
}

# Returns dir name with trailing slash
function my_get_dirname()
{
    dir=$1
    if [[ ${dir:${#dir}-1:1} != '/' ]]; then 
        dir=$dir"/"
    fi
    echo $dir
}

src_dir=`my_get_dirname $1`
dst_dir=`my_get_dirname $2`
verbose=1

# Validate args
if [[ ! -d $src_dir ]]; then 
    usage "'$src_dir' is not a directory"
elif [[ ! -d $dst_dir  ]]; then 
    usage "'$dst_dir' is not a directory"
fi

# Remember current dir 
dir=`pwd`
cd $src_dir

# Loop through files and folders 
svn st | awk '{ print $2 }' | while read F
do
    if [[ $F != 'framework' ]]; then
        # Create directory, if not exists
        d=`dirname "$dst_dir$F"`
        if [[ ! -d $d ]]; then 
            mkdir -p "$d"
        fi

        # Copy file or directory
        if [[ -f $F ]]; then
            [[ $verbose = 1 ]] && echo "FILE $F"
            cp -f "$F" "$dst_dir$F"
        elif [[ -d $F ]]; then
            [[ $verbose = 1 ]] && echo "DIR $F"
            [[ ! -d "$dst_dir$F" ]] && mkdir -p "$dst_dir$F"
            cp -rf $F $dst_dir$F/../
        fi
    fi
done

# Go to the initial dir 
cd $dir

I'd be glad, if it helped someone.