cut awk dummy question :)

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

2. UNIX for Dummies Questions & Answers

Dummy question on awk

Hi, I have a file which has three columns and 200 rows. I would like to print an extra column say "disco" for every 10 th row starting from 4 th row. How is that possible? Thnx

3. IP Networking

Hello everyone, I have a some doubt about DNS. We have connected to 2 ISPs /ISP#1 and ISP#2/. Our web site's dns zone is located on ISP#1. If connection to ISP#1 is down clients won't find our website. ISP#1 connection went down few times this month. So we are going to create our website's...

4. UNIX for Dummies Questions & Answers

a dummy question on data processing

Hi, everyone, I have a matrix, let's say: 1 2 3 4 5 6 ... 4 5 6 7 8 9 ... 7 8 9 1 2 3 ... 3 4 5 6 7 8 ... ......... (nxm matrix) Is there a simple command that can take certain specific rows out of the matrix? e.g., I want to take row 2 (4 5 6 7 8 9 ...) and row 4 (3 4 5 6 7 8...

5. UNIX for Dummies Questions & Answers

dummy question on data process

I have a file which contains 6 columns. But I only need the first 3 columns. So I need to remove the last 3 columns. I checked 'cut' but it seems not working. So is there a command that could remove certain columns from a file? :( Thanks a lot!!

6. UNIX for Dummies Questions & Answers

a dummy question...needs help...

I am trying to use 'cut' to get a line from my file. But it seems that 'cut' recongnizes TAB as default. My file uses space instead. So 'cut' doesn't work. Anybody can tell me how to change the default from TAB to space ? Or how to transform a space-delimited file into tab-delimited file??...

7. UNIX for Dummies Questions & Answers

Dummy question about /proc/cpuinfo

Perhaps this is a very dummy question but sorry I don't know other place to do it. We just buy a new cluster of Xeon machines but there is something I don't understand and perhaps someone can help me. The more /proc/cpuinfo produces the following output (just part of it). processor : 0...

8. Filesystems, Disks and Memory

A simple dummy question

Hello Everyone! changing from Microsoft to Macintosh, I connected my hard disk (nearly full) to the apple computer, which could not recognize it. I was prompt to "initialize it", unfortunately I DECIDED YES!!, but just for 1/100 of a second: now I cannot access the hard disk at all. Is still...

9. UNIX for Dummies Questions & Answers

question from a dummy

okay so I just started this unix class and understood all the test questions but this "normal" question threy me through a loop :confused:. The question is Why are UNIX commands noninteractive and why is their output not usually preceededby header information? This question has been driving me...

10. UNIX for Dummies Questions & Answers

Unix dummy's question

:confused: Hi, 2 questions to get some insight. Thanks (1) I would like to add a prefix (XX00) in each row of the line in my text file and save a newly generated file another name. How to go about it. (2) How to insert a blank line into each row in my file. and save the file another name....

LEARN ABOUT ULTRIX

cut

cut(1) General Commands Manual cut(1)

Name
cut - cut out selected fields of each line of a file

Syntax
cut -clist [file1 file2...]
cut -flist [-dchar] [-s] [file1 file2...]

Description
Use the command to cut out columns from a table or fields from each line of a file. The fields as specified by list can be fixed length,
that is, character positions as on a punched card (-c option), or the length can vary from line to line and be marked with a field delim-
iter character like tab (-f option). The command can be used as a filter. If no files are given, the standard input is used.

Use to make horizontal ``cuts'' (by context) through a file, or to put files together in columns. To reorder columns in a table, use and

Options
list Specifies ranges that must be a comma-separated list of integer field numbers in increasing order. With optional - indicates
ranges as in the -o option of nroff/troff for page ranges; for example, 1,4,7; 1-3,8; -5,10 (short for 1-5,10); or 3- (short
for third through last field).

-clist Specifies character positions to be cut out. For example, -c1-72 would pass the first 72 characters of each line.

-flist Specifies the fields to be cut out. For example, -f1,7 copies the first and seventh field only. Lines with no field delim-
iters are passed through intact (useful for table subheadings), unless -s is specified.

-dchar Uses the specified character as the field delimiter. Default is tab. Space or other characters with special meaning to the
shell must be quoted. The -d option is used only in combination with the -f option, according to XPG3 and SVID2/SVID3.

-s Suppresses lines with no delimiter characters. Unless specified, lines with no delimiters are passed through untouched.
Either the -c or -f option must be specified.

Examples
Mapping of user IDs to names:
cut -d: -f1,5 /etc/passwd
To set name to the current login name for the csh shell:
set name=`who am i | cut -f1 -d" "`
To set name to the current login name for the sh, sh5, and ksh shells:
name=`who am i | cut -f1 -d" "`

Diagnostics
"line too long" A line can have no more than 511 characters or fields.

"bad list for c/f option"
Missing -c or -f option or incorrectly specified list. No error occurs if a line has fewer fields than the list calls
for.

"no fields" The list is empty.

UNIX for Dummies Questions & Answers