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in reply to Re^4: replace string
in thread replace string

Better idea would be to provide hex dump of data, so we know what the actual bytes are
echo |hexdump 00000000: 45 43 48 4F 20 69 73 20 - 6F 6E 2E 0D 0A |ECHO is o +n. | 0000000d;
or
echo |od -tx1 0000000 45 43 48 4f 20 69 73 20 6f 6e 2e 0d 0a 0000015