AWK scripting :How to remove Field separator using awk

Posted by anil-1985 on Stack Overflow See other posts from Stack Overflow or by anil-1985
Published on 2010-06-02T12:29:18Z Indexed on 2010/06/02 12:33 UTC
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shell

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shell-scripting

Need the following output

ONGC044 
ONGC043
ONGC042
ONGC041
ONGC046
ONGC047

from this input

Medium Label                   Medium ID                            Free Blocks
===============================================================================
[ONGC044] ECCPRDDB_FS_43       ac100076:4aed9b39:44f0:0001            195311616
[ONGC043] ECCPRDDB_FS_42       ac100076:4aed9b1d:44e8:0001            195311616
[ONGC042] ECCPRDDB_FS_41       ac100076:4aed9af4:4469:0001            195311616
[ONGC041] ECCPRDDB_FS_40       ac100076:4aed9ad3:445e:0001            195311616
[ONGC046] ECCPRDDB_FS_44       ac100076:4aedd04a:68c6:0001            195311616
[ONGC047] ECCPRDDB_FS_45       ac100076:4aedd4a0:6bf5:0001            195311616

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