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$ cat file
0001 firstname1 lastname1 0002 firstname2 lastname2 0003 firstname3 lastname3 0004 firstname4 lastname4

$ awk 'ORS = !(NR%3)? "\n" : FS ' RS=" " file
0001 firstname1 lastname1
0002...

awk '{gsub(/>/,RS $1 FS)}1' infile

# awk '{print $9"@"$7}' RS="\n\n\n" text
xxxxxxxxx@11.11.11.11
yyyyyyyyyyyyy@11.11.11.22
zzzzzzzzzzz@11.11.11.33

Or#!/bin/bash
b=(2 4 6)
a=0
for i in ${b[@]}
do
narray[a++]=$((i*2))
done
echo ${narray[@]}

Can't you use unique sort?
sort -ut, -k1,3 infile > outfile

And slightly tweaking agama's solution, here's without the use of temp file.

#! /bin/bash

i=0
while IFS=, read a b
do
names[$i]=${a#*=}
locs[$i]=$b
(( i++ ))
done < inputfile

% cat infile
1333553619.647
1333553620.859
% sed 'N; s/\(.*\)\n\(.*\)/\2-\1/' infile|bc
1.212

#!/bin/bash

getmd5sum()
{
ssh ${1} "md5sum ${file} | awk '{print $1}'"
}

for file in $(cat file_list); do
[[ "$(getmd5sum ipaddr1)" != "$(getmd5sum ipaddr2)" ]] && echo ${file} >>...

@rpf, if you use the suggestion with IFS, don't forget to put IFS back to its original value if you plan to do more stuff in the same shell, otherwise you will get unexpected results...

NOTE: these solutions are GNU only, nothing wrong with that, but this will not work on every platform...

awk -F: '/^Record/{p=$1}/ID.*[^0]"$/{print p}' infile
*edit* this is incorrect

$ cat infile
<complexTypename="abc">
bklah vlah
blah
blha blha blah
blha

</complexType >
<complexTypename="def">
bklah vlah
blah
blha blha blah
blha

</complexType >


$ cat...

top -n 1 | awk '{ if (NR==4) print int($5) }'

script_to_run:

for n in $(find /data1 -name 'ini*.ext'); do
echo cp $n "${n}.ext"
done

Invoking the script:

ssh user@machineB "bash -s" < script_to_run

xargs -n 1 which < listfile

Try...awk '{a=b=0;for(i=1;i<=NF;i++)if($i+0==$i){a+=$i;b++};print a/b}' file1

#! /bin/bash
while read x
do
y=''
while [ ${#x} -gt 0 ]
do
y="${y}${x:0:2}:"; x=${x#??}
done
echo ${y%?}
done < inputfile


or

sed 's/\(..\)/\1:/g; s/:$//'...

Hi, try:
awk 'NR%2{getline p<f}{print p OFS $1}' f=file1 file2