LinuxQuestions.org - [SOLVED] Remove trailing characters while adding leading characters

To further generalize...

Suppose the alchemist want to change two base metals to one precious metal.

With this InFile ...

Code:

m1_IRON some other text m2_IRON

p2_LEAD yet more text p2_IRON extra text

change is good hello_LEAD

... this code ...

Code:

BaseMetal1='IRON'

BaseMetal2='LEAD'

PreciousMetal='GOLD'

sed -r 's/([[:alnum:]]+)_('$BaseMetal1'|'$BaseMetal2')/'$PreciousMetal'_\1/g' <$InFile >$OutFile

... produces this OutFile ...

Code:

GOLD_m1 some other text GOLD_m2

GOLD_p2 yet more text GOLD_p2 extra text

change is good GOLD_hello

Daniel B. Martin

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