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The simplest i know
pidof -x -o $$ $(basename "$0") && exit 1

something likesed -n '/\<component/,/.*>/p' infile.xml | grep -E 'version=|description='

getting parameters in a function is the same as in a script. If you call the script like InsertRecord "$OLD_VAL" "$NEW_VAL" "$DATE"
you can retrieve the values inside the function (as in your...

You can simply add html tags in your echo statements.
Don't forget to add echo statements for header and footer.
If you use variables for the tags, you can choose between plain text or html by...

I'm searching for a similar tool.
I found a simple way to print the duplicate file names
#!/bin/bash
FILES=/dev/shm/filelist
find -type f | awk -F'/' '{print $NF}' | sort | uniq -d > $FILES...

If they must be exactly the same
systime=2011-05-13:18:45
shubtime=2011-05-13:18:30
if [ "$systime" = "$shubtime" ]
then
echo" OK"
else
echo "NOK"
fi
Or shorter:[ "$systime" =...

#!/bin/bash
##!/bin/bash
var2="bgroup = set bgroup port"
var3="utm = set security utm"
echo "$var2 --> '${var2# = }'"
echo "$var3 --> '${var3# = }'"
# You can also
for V in var2 var3; do
...

Could be written (with arithmetic evaluation and array)
#!/usr/bin/bash
parity=(even odd) # parity[0]='even' parity[1]='odd'
read -p "enter a number: " a
echo "the number is ${parity[$((a%2))]}

No need to mkdir -p /foo if you already mkdir -p /foo/dir1 as the -p option creates parents.

#!/bin/bash
for d1 in boo doo foo; do
for d2 in dir1 dir2; do
mkdir -p /$d1/$d2
...

#!/bin/bash
while IFS='&' read -a L
do
for i in ${!L[@]}; do
eval "${L[$i]}"
done
for V in poc ooc mjv omj mov ps rel bod oxi ozn lang loc
do
echo -en "$V=${!V}\t"
...

If you have GNU date
$ D1="5/21/2010 9:14:00 AM"
$ D2="5/24/2010 7:23:00 AM"
$ DM=$((($(date -d "$D2" +%s)-$(date -d "$D1" +%s))/60))
$ printf "%s:%02d\n" $((DM/60)) $((DM%60))
70:09

Just an example of how it can be done (first get rid of the GOTO):
#!/bin/bash
while : ; do
echo "SELECT OPTION"
echo "-------------"
echo "1- Create username"
echo "2- Create...

Please, use code tags.
Somthing like
if (($#<2)); then
echo "There must be at least 2 parameters (pattern, file)"
exit 1
fi
Pattern="$1"
shift
Response=$(grep "$Pattern" "$@")
#...

Yes I can !

Why store it? (but it's preferable to store the date string to avoid calls to date in the iteration.
#!/bin/bash
D=$(date +%d-%m-%Y)
for F in *.*
do
mv $F ${F%.*}-$D.${F##*.}"
done

Please, use code tags to make the code more readable.
Howto:

Select the text corresponding to code
Click on the 'code' button in the editor's...

What's the output of this:
#!/bin/bash
while IFS=':=' read A B C
do
echo "A='$A' B='$B' C='$C'"
done <$INFILE

---------- Post updated at 23:06 ---------- Previous update was at 21:52...

egrep:
F=570345
echo *${F}* | grep -E '[^0-9]$F[^0-9]'
# ls *${F}* | grep -E '[^0-9]$F[^0-9]' # If the previous doesn't work

#!/bin/bash
while IFS='<>' read Null Tag Val Null
do
case $Tag in
free-energy)
echo $Val
Pos=0 ;;
position)
((Pos++))
((Pos%2)) && echo -n...

Simple
while read file
do rm -f FolderB/$file
done < <(ls FolderA)

No need to count the lines:
while read L
do
echo "$L"
done <playerlist
Above code reads each line of playerlist and assigns it to the variable L; then prints the variable on screen, until...

grep -i 'model name' /proc/cpuinfo | cut -d: -f2 | head -1

With the GNU date:
LIMIT=$(date -d '-8 days' '+%Y/%m/%d')
while IFS='|'; read D L
do [[ $D > $LIMIT ]] && echo "$D|$L"
done < infile
awk:
awk -F'|' -vD=$(date -d '-8 days' '+%Y/%m/%d') '$1 > D'...

sed -e 's/ [^ ]*\.log//g' -e 's/ / /g' -e 's/^ //' file
To modify file in place
sed -i -e 's/ [^ ]*\.log//g' -e 's/ / /g' -e 's/^ //' file
If -i option isn't available, you can redirect outpu to...

I wrote a function to handle different cases of pause in shell scripts. You can simplify it for your needs.
pause() { # [1:timeout] [2:prompt]
local P T
[[ $1 =~ ^[0-9]+$ ]] && { T=$1; shift; }...