Need help removing repeating lines

[fsanchez13]

I have a outfile that has nothing but time stamps and I need to parse through it and just grab the first two different times I colored them in red. The actual file has many more lines of repeating time stamps but I shortend for this post. Please help!!!

23:59:34
23:59:34
23:59:34
23:59:34
23:59:34
23:59:34
23:59:34
23:59:34
23:59:34
23:59:34
23:59:34
00:29:34
00:29:34
00:29:34
00:29:34
00:29:34
00:29:34
00:29:34
00:29:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
00:59:34
01:29:34
01:29:34
01:29:34
01:29:34
01:29:34
01:29:34
01:29:34
01:29:34

 

[PHV]

man uniq

you can also take a look at the

 sort -u

command.

Hope This Help
PH.

 

[vgersh99]

uniq file.txt | head -2

vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[CaKiwi]

Or if you need the output records to be in the same order as in the original file, you could use the following awk program

awk -f fsanchez13.awk input-file

# ------ fsanchez13.awk ------
{
if ($0 != a) {
if (NR > 1) print a
a = $0
}
}
END {
if (a) print a
}

CaKiwi

&quot;I love mankind, it's people I can't stand&quot; - Linus Van Pelt