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# 2 chars starting from 3rd
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$ echo string | sed -r 's/.{3}(.{2}).*/\1/'
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in
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|
# remove first 3 chars
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|
echo string | sed -r 's/^.{3}//'
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|
# delete last char
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|
$ echo string | sed -r 's/.$//'
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|
strin
|
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# `r' with two following chars
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|
$ echo string | sed -r 's/.*(r.{2}).*/\1/'
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|
rin
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