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Top Forums Shell Programming and Scripting KSH or AWK for fetching the first and the last line based on time. Post 302699651 by Ygor on Wednesday 12th of September 2012 06:17:32 AM
Old 09-12-2012
Try...
Code:
$ cat file1
10.160.101.160,0708044510,22.203.195.151
10.160.101.160,0708044645,22.203.195.151
10.160.101.160,0708050410,22.203.195.151
10.160.101.161,0707073952,22.203.199.152
10.160.101.161,0707074936,22.203.199.152
10.160.101.161,0707075457,22.203.199.152

$ awk -F, '$1!=p1&&$3!=p3{if(p1)print p0;print;p1=$1;p3=$3}{p0=$0}END{print}' file1 > file2

$ cat file2
10.160.101.160,0708044510,22.203.195.151
10.160.101.160,0708050410,22.203.195.151
10.160.101.161,0707073952,22.203.199.152
10.160.101.161,0707075457,22.203.199.152

$

 

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ISALPHA(3)						   BSD Library Functions Manual 						ISALPHA(3)

NAME
isalpha -- alphabetic character test LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <ctype.h> int isalpha(int c); DESCRIPTION
The isalpha() function tests for any character for which isupper(3) or islower(3) is true. The value of the argument must be representable as an unsigned char or the value of EOF. In the ASCII character set, this includes the following characters (preceded by their numeric values, in octal): 101 ``A'' 102 ``B'' 103 ``C'' 104 ``D'' 105 ``E'' 106 ``F'' 107 ``G'' 110 ``H'' 111 ``I'' 112 ``J'' 113 ``K'' 114 ``L'' 115 ``M'' 116 ``N'' 117 ``O'' 120 ``P'' 121 ``Q'' 122 ``R'' 123 ``S'' 124 ``T'' 125 ``U'' 126 ``V'' 127 ``W'' 130 ``X'' 131 ``Y'' 132 ``Z'' 141 ``a'' 142 ``b'' 143 ``c'' 144 ``d'' 145 ``e'' 146 ``f'' 147 ``g'' 150 ``h'' 151 ``i'' 152 ``j'' 153 ``k'' 154 ``l'' 155 ``m'' 156 ``n'' 157 ``o'' 160 ``p'' 161 ``q'' 162 ``r'' 163 ``s'' 164 ``t'' 165 ``u'' 166 ``v'' 167 ``w'' 170 ``x'' 171 ``y'' 172 ``z'' RETURN VALUES
The isalpha() function returns zero if the character tests false and returns non-zero if the character tests true. COMPATIBILITY
The 4.4BSD extension of accepting arguments outside of the range of the unsigned char type in locales with large character sets is considered obsolete and may not be supported in future releases. The iswalpha() function should be used instead. SEE ALSO
ctype(3), isalnum_l(3), islower(3), isupper(3), iswalpha(3), ascii(7) STANDARDS
The isalpha() function conforms to ISO/IEC 9899:1990 (``ISO C90''). BSD
July 17, 2005 BSD
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