Bash - Making use of your .bashrc file

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I was playing with my .bashrc file again, and was once again impressed by
how you can tweak Linux to do what YOU want it to do so easily. I am sure
there are tons of other tweaks you can do to your .bashrc file, but I
really like some of mine, and thought I would share them. Some of the
alias's I created, some I found on the net, and some things in my .bashrc
file are just there for fun, like the "# WELCOME SCREEN", although it does
serve a purpose for me at the same time, it might not be something
everyone would want or need.



For those that don't know what a .bashrc file does:
"The ~/.bashrc file determines the behavior of interactive shells."
Quoted From: The Advanced Bash Scripting Guide



Basically , it allows you to create shortcuts (alias's) and interactive
programs (functions) that run on the startup of the bash shell or that are
used when running an interactive shell. For example, it's much easier to
just type: ebrc instead of pico ~/.bashrc (I used the alias ebrc , and it
stands for "Edit Bash RC file". I could have also aliased it to just use
one letter, making it a VERY fast short cut. The bashrc file allows you
to create alias's (shortcuts) to almost anything you want. My list is
pretty long, but I'm sure there is someone with a longer list



I have my .bashrc file setup in sections. The following is the breakdown
by section of how I keep my list of alias's and functions separated. This
is just how I do this, your .bashrc file can be modified to suit YOUR
needs, that's the interesting part about the .bashrc file. It's VERY
customizable and very easy to change.



Header (So I know when i modified it last and what i was running it on)

Exports (So I can set history size, paths , editors, define colors, etc,)

Sourced Alias's (So I can find those hidden alias's faster)

Workstation Alias's (so i can ssh to local machines quickly)

Remote Server Alias's (so i can ssh to remote servers easily)

Script Alias's (quick links to some of my bashscripts)

Hardware control alias's (so I can control cd/dvd/scanners/audio/etc)

Modified commands (Alias's to normal linux commands with special flags)

Chmod Alias's (makes changing permissions faster)

Alias's for GUI programs (start firefox, etc from command line)

Alias's for xterm and others (open xterm with special settings)

Alias's for Lynx (open lynx with urls - kind of a bash bookmark )

UNused Alias's (Alias's that aren't in use on the system, but that i might
use later)

Special functions (more of a function than just an alias..it goes here)

Notes (that should be self explanatory )

Welcome Screen (code to make my bash shell display some stuff as it starts
up)



That's how I lay out my .bashrc files. It may not be perfect, but it
works well for me. I like making changes in just my .bashrc file and not
the global files. I like the .bashrc file because you don't need root
permissions to make changes that make your life easier at the bash shell.



The following is my .bashrc file (with some things obviously commented out
for security... but most of it should be self explanatory). Anyone with
comments/suggestions/ideas feel free to let me know. I'm always looking
for new and interesting things to do with the .bashrc file.



Want to know what alias's your bash shell has? Simply type the word alias
at the command line. The shell will then print out the list of active
alias's to the standard output (normally your screen).



#######################################################
# Dave Crouse's .bashrc file
# www.bashscripts.org
# www.usalug.org
#
# Last Modified 04-08-2006
# Running on OpenSUSE 10
#######################################################


# EXPORTS
#######################################################

PATH=$PATH:/usr/lib/festival/ ;export PATH
export PS1="[\[\033[1;34m\w\[\033[0m]\n[\t \u]$ "
export EDITOR=/usr/bin/pico
export HISTFILESIZE=3000 # the bash history should save 3000 commands
export HISTCONTROL=ignoredups #don't put duplicate lines in the history.
alias hist='history | grep $1' #Requires one input

# Define a few Color's
BLACK='\e[0;30m'
BLUE='\e[0;34m'
GREEN='\e[0;32m'
CYAN='\e[0;36m'
RED='\e[0;31m'
PURPLE='\e[0;35m'
BROWN='\e[0;33m'
LIGHTGRAY='\e[0;37m'
DARKGRAY='\e[1;30m'
LIGHTBLUE='\e[1;34m'
LIGHTGREEN='\e[1;32m'
LIGHTCYAN='\e[1;36m'
LIGHTRED='\e[1;31m'
LIGHTPURPLE='\e[1;35m'
YELLOW='\e[1;33m'
WHITE='\e[1;37m'
NC='\e[0m' # No Color
# Sample Command using color: echo -e "${CYAN}This is BASH
${RED}${BASH_VERSION%.*}${CYAN} - DISPLAY on ${RED}$DISPLAY${NC}\n"


# SOURCED ALIAS'S AND SCRIPTS
#######################################################

### Begin insertion of bbips alias's ###
source ~/.bbips/commandline/bbipsbashrc
### END bbips alias's ###

# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi

# enable programmable completion features
if [ -f /etc/bash_completion ]; then
. /etc/bash_completion
fi


# ALIAS'S OF ALL TYPES SHAPES AND FORMS ;)
#######################################################

# Alias's to local workstations
alias tom='ssh 192.168.2.102 -l root'
alias jason='ssh 192.168.2.103 -l root'
alias randy='ssh 192.168.2.104 -l root'
alias bob='ssh 192.168.2.105 -l root'
alias don='ssh 192.168.2.106 -l root'
alias counter='ssh 192.168.2.107 -l root'

# ALIAS TO REMOTE SERVERS
alias ANYNAMEHERE='ssh YOURWEBSITE.com -l USERNAME -p PORTNUMBERHERE'
# My server info removed from above for obvious reasons ;)

# Alias's to TN5250 programs. AS400 access commands.
alias d1='xt5250 env.TERM = IBM-3477-FC env.DEVNAME=D1 192.168.2.5 &'
alias d2='xt5250 env.TERM = IBM-3477-FC env.DEVNAME=D2 192.168.2.5 &'
alias tn5250j='nohup java -jar /home/crouse/tn5250j/lib/tn5250j.jar
2>>error.log &'

# Alias's to some of my BashScripts
alias bics='sh /home/crouse/scripts/bics/bics.sh'
alias backup='sh /home/crouse/scripts/usalugbackup.sh'
alias calc='sh /home/crouse/scripts/bashcalc.sh'
alias makepdf='sh /home/crouse/scripts/makepdf.sh'
alias phonebook='sh /home/crouse/scripts/PHONEBOOK/baps.sh'
alias pb='sh /home/crouse/scripts/PHONEBOOK/baps.sh'
alias ppe='/home/crouse/scripts/passphraseencryption.sh'
alias scripts='cd /home/crouse/scripts'

# Alias's to control hardware
alias cdo='eject /dev/cdrecorder'
alias cdc='eject -t /dev/cdrecorder'
alias dvdo='eject /dev/dvd'
alias dvdc='eject -t /dev/dvd'
alias scan='scanimage -L'
alias playw='for i in *.wav; do play $i; done'
alias playo='for i in *.ogg; do play $i; done'
alias playm='for i in *.mp3; do play $i; done'
alias copydisk='dd if=/dev/dvd of=/dev/cdrecorder' # Copies bit by bit
from dvd to cdrecorder drives.
alias dvdrip='vobcopy -i /dev/dvd/ -o ~/DVDs/ -l'

# Alias's to modified commands
alias ps='ps auxf'
alias home='cd ~'
alias pg='ps aux | grep' #requires an argument
alias un='tar -zxvf'
alias mountedinfo='df -hT'
alias ping='ping -c 10'
alias openports='netstat -nape --inet'
alias ns='netstat -alnp --protocol=inet | grep -v CLOSE_WAIT | cut
-c-6,21-94 | tail 2'
alias du1='du -h --max-depth=1'
alias da='date " %Y-%m-%d %A %T %Z"'
alias ebrc='pico ~/.bashrc'

# Alias to multiple ls commands
alias la='ls -Al' # show hidden files
alias ls='ls -aF --color=always' # add colors and file type extensions
alias lx='ls -lXB' # sort by extension
alias lk='ls -lSr' # sort by size
alias lc='ls -lcr' # sort by change time
alias lu='ls -lur' # sort by access time
alias lr='ls -lR' # recursive ls
alias lt='ls -ltr' # sort by date
alias lm='ls -al |more' # pipe through 'more'

# Alias chmod commands
alias mx='chmod a x'
alias 000='chmod 000'
alias 644='chmod 644'
alias 755='chmod 755'

# Alias Shortcuts to graphical programs.
alias kwrite='kwrite 2>/dev/null &'
alias firefox='firefox 2>/dev/null &'
alias gaim='gaim 2>/dev/null &'
alias kate='kate 2>/dev/null &'
alias suk='kdesu konqueror 2>/dev/null &'

# Alias xterm and aterm
alias term='xterm -bg AntiqueWhite -fg Black &'
alias termb='xterm -bg AntiqueWhite -fg NavyBlue &'
alias termg='xterm -bg AntiqueWhite -fg OliveDrab &'
alias termr='xterm -bg AntiqueWhite -fg DarkRed &'
alias aterm='aterm -ls -fg gray -bg black'
alias xtop='xterm -fn 6x13 -bg LightSlateGray -fg black -e top &'
alias xsu='xterm -fn 7x14 -bg DarkOrange4 -fg white -e su &'

# Alias for lynx web browser
alias bbc='lynx -term=vt100 http://news.bbc.co.uk/text_only.stm'
alias nytimes='lynx -term=vt100 http://nytimes.com'
alias dmregister='lynx -term=vt100 http://desmoinesregister.com'


# SOME OF MY UNUSED ALIAS's
#######################################################

# alias d=`echo "Good Morning Dave. today's date is" | festival --tts;
date '%A %B %e' | festival --tts`
# alias shrink84='/home/crouse/shrink84/shrink84.sh'
# alias tl='tail -f /var/log/apache/access.log'
# alias te='tail -f /var/log/apache/error.log'


# SPECIAL FUNCTIONS
#######################################################

netinfo ()
{
echo "--------------- Network Information ---------------"
/sbin/ifconfig | awk /'inet addr/ {print $2}'
echo ""
/sbin/ifconfig | awk /'Bcast/ {print $3}'
echo ""
/sbin/ifconfig | awk /'inet addr/ {print $4}'

# /sbin/ifconfig | awk /'HWaddr/ {print $4,$5}'
echo "---------------------------------------------------"
}

spin ()
{
echo -ne "${RED}-"
echo -ne "${WHITE}\b|"
echo -ne "${BLUE}\bx"
sleep .02
echo -ne "${RED}\b ${NC}"
}

scpsend ()
{
scp -P PORTNUMBERHERE "$@"
USERNAME@YOURWEBSITE.com:/var/www/html/pathtodirectoryonremoteserver/;
}


# NOTES
#######################################################

# To temporarily bypass an alias, we preceed the command with a \
# EG: the ls command is aliased, but to use the normal ls command you would
# type \ls

# mount -o loop /home/crouse/NAMEOFISO.iso /home/crouse/ISOMOUNTDIR/
# umount /home/crouse/NAMEOFISO.iso
# Both commands done as root only.


# WELCOME SCREEN
#######################################################

clear
for i in `seq 1 15` ; do spin; done ;echo -ne "${WHITE} USA Linux Users
Group ${NC}"; for i in `seq 1 15` ; do spin; done ;echo "";
echo -e ${LIGHTBLUE}`cat /etc/SUSE-release` ;
echo -e "Kernel Information: " `uname -smr`;
echo -e ${LIGHTBLUE}`bash --version`;echo ""
echo -ne "Hello $USER today is "; date
echo -e "${WHITE}"; cal ; echo "";
echo -ne "${CYAN}";netinfo;
mountedinfo ; echo ""
echo -ne "${LIGHTBLUE}Uptime for this computer is ";uptime | awk /'up/
{print $3,$4}'
for i in `seq 1 15` ; do spin; done ;echo -ne "${WHITE} http://usalug.org
${NC}"; for i in `seq 1 15` ; do spin; done ;echo "";
echo ""; echo ""



The following belong under the "function" section in my .bashrc. Useable
as seperate programs, I've integrated them simply as functions for my
.bashrc file in order to make them quick to use and easy to modify and
find. These are functions that are used to symetrically encrypt and to
decrypt files and messages. Some are completely command line, and the last
two create gui interfaces to locate the files to encrypt/decrypt. If you
create a program out of the functions creating a link via a shortcut/icon
on the desktop would create a completely gui based interface to locate and
encrypt/decrypt files. Either way, it's an easy way to use gpg.



Requires: zenity, gpg



################### Begin gpg functions ##################
encrypt ()
{
# Use ascii armor
gpg -ac --no-options "$1"
}

bencrypt ()
{
# No ascii armor
# Encrypt binary data. jpegs/gifs/vobs/etc.
gpg -c --no-options "$1"
}

decrypt ()
{
gpg --no-options "$1"
}

pe ()
{
# Passphrase encryption program
# Created by Dave Crouse 01-13-2006
# Reads input from text editor and encrypts to screen.
clear
echo " Passphrase Encryption Program";
echo "--------------------------------------------------"; echo "";
which $EDITOR &>/dev/null
if [ $? != "0" ];
then
echo "It appears that you do not have a text editor set in your
.bashrc file.";
echo "What editor would you like to use ? " ;
read EDITOR ; echo "";
fi
echo "Enter the name/comment for this message :"
read comment
$EDITOR passphraseencryption
gpg --armor --comment "$comment" --no-options --output
passphraseencryption.gpg --symmetric passphraseencryption
shred -u passphraseencryption ; clear
echo "Outputting passphrase encrypted message"; echo "" ; echo "" ;
cat passphraseencryption.gpg ; echo "" ; echo "" ;
shred -u passphraseencryption.gpg ;
read -p "Hit enter to exit" temp; clear
}

keys ()
{
# Opens up kgpg keymanager
kgpg -k
}

encryptfile ()
{
zenity --title="zcrypt: Select a file to encrypt" --file-selection > zcrypt
encryptthisfile=`cat zcrypt`;rm zcrypt
# Use ascii armor
# --no-options (for NO gui usage)
gpg -acq --yes ${encryptthisfile}
zenity --info --title "File Encrypted" --text "$encryptthisfile has been
encrypted"
}

decryptfile ()
{
zenity --title="zcrypt: Select a file to decrypt" --file-selection > zcrypt
decryptthisfile=`cat zcrypt`;rm zcrypt
# NOTE: This will OVERWRITE existing files with the same name !!!
gpg --yes -q ${decryptthisfile}
zenity --info --title "File Decrypted" --text "$encryptthisfile has been
decrypted"
}

################### End gpg functions ##################


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