01-04-2007
Use 'sort -u' if your file isn't already sorted.
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1. Shell Programming and Scripting
I have a flat file and need to count no of records in the file less the header and the trailer record.
I would appreciate any and all asistance
Thanks
Hadi Lalani (2 Replies)
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2. Shell Programming and Scripting
Hi All,
I have two files say file1 and file2.
I want to check the number of records in file1 and if its atleast 2 (i.e., 2 or greater than 2 ) then I have to check records in file2 .If records in file2 is atleast 1 (i.e. if its not empty ) i have to set some conditions .
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3. Shell Programming and Scripting
Hi,
I have a huge file say with 2000000 records. The file has 42 fields. I would like to pick randomly 1000 records from this huge file. Can anyone help me how to do this? (1 Reply)
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4. UNIX for Dummies Questions & Answers
Hi everyone.
I am a newbie to Linux stuff. I have this kind of problem which couldn't solve alone. I have a text file with records separated by empty lines like this:
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5. Web Development
Hi all,
I have an interesting and I am sure simple question for yau'll.
Basically this is what I am after:
The table:
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6. UNIX for Dummies Questions & Answers
Hello,
I have a file which looks like:
%_SPE_RDP_NUM_ECH(7)*************%
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%_SPE_RDP_NUM_ECH(72)************%
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7. Shell Programming and Scripting
From the below ps output , I want the distinct values of the third field (ie. I need the distinct PPIDs)
$ ps -ef
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root 1 0 0 Nov 10 - 48:49 /etc/init
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Hi Freinds ,
I have 2 files .
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|nag|HYd|1|Che
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File 2
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Red Hat Enterprise Linux 5.4
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10. Shell Programming and Scripting
Hi I am new to shell programming in unix
Please if I can provide help.
I have a file structure of a header record and "N" detail records.
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look(1) General Commands Manual look(1)
NAME
look - Finds lines in a sorted list
SYNOPSIS
look [-df] [-tcharacter] string [file]
The look command prints all lines in a sorted file that begin with string.
OPTIONS
Uses dictionary order; only letters, digits, tabs, and spaces are used in comparisons. Searches without regard to case; treats uppercase
and lowercase as equivalent. Ignores character and characters following it in the search string. If you specify look -tC ABCDE, the
string ABCDE would become (in effect) AB, with CDE being ignored. This option is primarily for shell scripts, in which more than one
string is being processed.
DESCRIPTION
If no file is specified, look searches in the system word list /usr/share/dict/words, with the options -df assumed by default.
The look command uses binary search.
The -d and -f options affect comparisons as in sort.
NOTES
In order to use the -f option, you must first sort file with the sort -f command; otherwise, look displays only lowercase items.
If you do not specify -f, but specify a file (such as /usr/share/dict/words) that has been sorted with sort -f, look may not produce any
output.
EXAMPLES
To search a sorted file called sortfile for all lines that begin with the string as, enter: look as sortfile To search the system word list
for all words beginning with smi, enter: look smi
This might result in: smile smirk smith smithereens Smithfield Smithson smithy smitten
FILES
System word list.
SEE ALSO
Commands: grep(1), sort(1), spell(1)
look(1)