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Under unix, I have text file contain records, each line is a record. I have both history<br />
file and update file, if history file<br />
contains:<br />
a<br />
b<br />
c<br />
update file contains <br />
c <br />
d<br />
how can I merge together get a file<br />
a <br />
b<br />
c <br />
d<br />
each letter stands for a line.<br />
Thanks.<br />
Shane<br />

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Under unix, I have text file contain records, each line is a record. I have both history
file and update file, if history file
contains:
a
b
c
update file contains 
c 
d
how can I merge together get a file
a 
b
c 
d
each letter stands for a line.
Thanks.
Shane


How to do this?

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.