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Try this :

while read word; do
i=$((i+1))
convert canvas.jpg \
\( -size 350x350 -background none \
-fill white -gravity center caption:"$word" -trim +repage -depth 8 \) \
-gravity center...

With GNU sed, try:
sed 's/Remove This: [0-9,]*/\t/' file

with regular sed you need to use a real TAB character, which can be entered with CTRL-V TAB
sed 's/Remove This: [0-9,]*/ /' file
...

Hello martinsmith,

I have a few to questions pose in response first:-
Is this homework/assignment? There are specific forums for these.
What have you tried so far?
What output/errors do you...

Will your input ever contain the string title=">PATTERN1 without a matching string PATTERN2 on the same line, such as one of the following?:
title=">PATTERN1 Tokyo City whatever whatever...

And, in those cases, what is supposed to happen? Does capitalization start with the first string and continue until the second string is seen on a subsequent line, or is capitalization only...

Would any of these do it?
perl -ple '$cl=$_; while(/title=">PATTERN1\s+(.*?)\s+PATTERN2/g){$opt=$mpt=$&; $os=$ms=$1; $ms=~s/\b(\w)/\U$1/g; $mpt=~s/$os/$ms/; $cl=~s/$opt/$mpt/}$_=$cl' patterns.file
...

Hello martinsmith,

Following awk solution may help you too in same, let me know if this helps.

awk '/^title=\">PATTERN1.*PATTERN2$/{A=$1;for(i=2;i<NF;i++){A=A OFS toupper(substr($i,1,1))...

cat patterns.file
blank">PATTERN1 some word PATTERN2
title=">PATTERN1 some word PATTERN2
blank">PATTERN1 another word PATTERN2
title=">PATTERN1 another word PATTERN2 and leave this alone PATTERN2...

Try:
sed 's/ / - /2' file
Note that this also leaves lines that don't have two <space> characters in them unmodified.

Hello bhupeshchavan,

Adding an awk solution for same now too.

awk '{$2=$2 FS "-"} 1' Input_file
If you need to remove any empty lines from Input_file then following may help you in same.
...

Aia, your solution does not work. First, there is a g too many. Second, the \b is not replicated to the \1. But even if I improve it like
perl -ne 'print unless /\b(\w+)\b.*\b\1\b/i'...

cat martinsmith.file
One and a Two
Unix.com is the Best
This as a Line Line
Example will be the same that EXAMPLE
Example duplicate sentence with the word duplicate

perl -ne 'print unless...

Best of breed
awk '{split("",A); for(i=1; i<=NF; i++) if (A[tolower($i)]++) next} 1' file
(Just seeing Scrutinizer has it already)

Note:

delete A is BSD awk and GNU awk only. With regular awks use for(i in A) delete A[i] or split("",A)
length(A) is GNU sed only, with regular awk, use a counter..


--
So POSIX awk...

I like that approach. Somewhat abbreviated:awk '{delete A; for(i=1; i<=NF; i++) if (++A[tolower($i)] > 1) next} 1' file
One and a Two
Unix.com is the Best

Interesting solution. In short it is
awk '{for(i=1; i<=NF; i++) A[tolower($i)]} (NF==length(A)); {delete A}'
But works only with a recent GNU awk.
Other awk versions say "fatal: attempt to use...

Hello martinsmith,

Adding one more solution here without 2 time loops, which may help you here. Let's say following is the Input_file.

One and a Two
Unix.com is the Best
This as a Line Line...

Adapting RudiC's suggestion for case independence and minimum string length:
awk '{for (i=1; i<NF; i++) for (j=i+1; j<=NF; j++) if ((tolower($i) == tolower($j)) && length($i)>=3) next}1' file

...

Hello martinsmith,

Could you please try this and let me know if this helps. I am ignoring case sensitivity here so it will match all kind of same words either they are in capital or small letters....

From what length is a "string" a string? Is "a" a string?

---------- Post updated at 11:40 ---------- Previous update was at 11:40 ----------

Does case matter?

---------- Post updated at...

Your Welcome, also if you have blank lines too into your Input_file and you want to leave them as it is, then following may help you. Let's say following is the Input_file:

First line of text...

Assuming that there is at least one space (or two words) on each line, you could also try the simpler:
sed 's/ / - /' file

Hello martinsmith,

Could you please try following and let me know if this helps you.

awk '{$2="-" OFS $2} 1' Input_file
Output will be as follows.

First - line of text
Second - line of...

You could also try:
sed 'sX \([^ ]*\)/\1X \1/Xg' file

Please, try:
perl -pe 's:(folder\d+)/\1:$1/:g' martinsmith.file
some text here folder1/ some text here folder1/ some text here folder1/ some text here
some text here folder2/ some text here...