echo "<string to append>" >> <file>

#Example:

echo "My string" >> /home/user/myfile.txt

Dock Top
defaults write com.apple.Dock orientation top

Dock Right
defaults write com.apple.dock pinning end

Some might rather have backup put key files somewhere else ie in .backup or /backup 


You could do that pretty easily too... 
Code:

bu () { cp $1 /backup/${1}-`date +%Y%m%d%H%M`.backup ; } 

This would put all files into /backup/ 

Code:

bu () { cp $1 ~/.backup/${1}-`date +%Y%m%d%H%M`.backup ; } 

This would put all the files into ~/.backup (in your home directory) 

this would require that you are IN the directory of the file you want to backup. You would move the file with the bu FILENAME ...... you could not use the /path/filename method like i listed above.

Here's a twist to so you can maintain your backed-up file in the same directory structure in your .backup directory 
Code:

bu () 
{ 
    if [ "`dirname $1`" == "." ]; then 
        mkdir -p ~/.backup/`pwd`; 
        cp $1 ~/.backup/`pwd`/$1-`date +%Y%m%d%H%M`.backup; 
    else 
        mkdir -p ~/.backup/`dirname $1`; 
        cp $1 ~/.backup/$1-`date +%Y%m%d%H%M`.backup; 
    fi 
}

mdfind 'kMDItemFSName == "*textmate*"cw' | grep "\.plist$"

bourne shells silently insert an unbalanced single, double or back quote at EOF (including here-documents)

#!/bin/bash

if [ ! "$1" ]
then
  1='.'
fi

echo "Processing $1"
svn add $1 `svn st $1 | grep '^?.*' | tr -d '? ' | sort -n | tr '\n' ' '`

#!/bin/bash
bean=`cat /proc/user_beancounters`
guar=`echo "$bean" | grep vmguar | awk '{ print $4;}'`
priv=`echo "$bean" | grep privvm | awk '{ print $2;}'`
let totl=guar/256
let used=priv/256
let free=$totl-$used
echo "                             "
echo "  #########################  "
echo "  #     Memory  Stats:    #  "
echo "  #########################  "
echo "                             "
echo "     Total......: $totl MB   "
echo "     In Use.....: $used MB   "
echo "     Available..: $free MB   "
echo "  =========================  "
echo "                             "

for F in * ; do NF=`echo $F | perl -lne "s/ /_/g; s/\._/./g; s/[',-]//g; print lc"` ; mv "$F" "$NF" ; done

find . -name "*.html" \( -name 'dirFoo' -prune -o  -name 'dirBar' -prune \) | xargs grep -n "THE_PATH_YOU_ARE_LOOKING_FOR"

find . -name "*.svn" -exec rm -f -r {} \;