04-18-2002
displaying the first line?
how do i display just the first line of a file with the cat command or any command for that matter
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi all,
Does anyone know how to ammend the .cshrc file in $HOME for your session to display the path as part of the command line? So that I dont need to keep on typing pwd to see where I am?
thanks
Ocelot (2 Replies)
Discussion started by: ocelot
2 Replies
2. UNIX for Dummies Questions & Answers
hi...
i need to display the last line of the file and capture the line in to a variable in unix envt.(not the perl ones)... please help (8 Replies)
Discussion started by: lmadhuri
8 Replies
3. UNIX for Dummies Questions & Answers
This is probably the dumbest question you guys can get, but I'm trying, as a complete noob, to display the unix calendar for all the months without Saturday and Sunday showing. How can I remove those fields without having to type all the fields in individually such as:
cal -y | awk '{print $2,... (3 Replies)
Discussion started by: Trellot
3 Replies
4. UNIX for Dummies Questions & Answers
Hi
I really hope someone can help with the below question.
Lets say that I have a file called output.txt and I want to display all of the lines which contain the word ‘disconnect'. I know that this can easily be obtained by using the following command:
grep -i disconnect output.txt
However,... (6 Replies)
Discussion started by: Sunny Sid
6 Replies
5. Shell Programming and Scripting
Hi,
I have a file split.txt with the following contents
one
two
three
four
five
Suppose if i want to display contents of line 3, I know this could be achieved using the command
sed -n '3p' split.txt
But I need the line number to be decided dynamically like
a=3
sed -n '$ap'... (2 Replies)
Discussion started by: deanamrita
2 Replies
6. Shell Programming and Scripting
cat my.log
blah blah blah
< 1 djfh jsdfhk jksdfh
< 2 dshkfl opeir pqowi
< 4 khasd wouipeui
say i am perfroming some action similar to below...
cat my.log | egrep "<" | awk -F' ' '{print $2}' | grep -v ""
it gives output as below
1
2
4
is there anyway to modify above same... (4 Replies)
Discussion started by: vivek d r
4 Replies
7. UNIX for Dummies Questions & Answers
Within AWK, how do you display a field of NR? Here's my code:
awk '(NR>1) && (P1=$1-w)>=100000 {print "increase of" " " P1*.0000179," " "kW at" " " 'NR*60/431900' " " "minutes" "\n" "change from" " " 'NR-10($1)' " " "kW to" " " 'NR+70($1)' "\n"}{w=$1}' filename
I can change NR and print... (3 Replies)
Discussion started by: markymarkg123
3 Replies
8. Shell Programming and Scripting
Input file.
GMDCOM.27936 : Process Request <36812974>
GMDCOM.27936 : Process Request <36812985>
GMDCOM.27936 : Process Request <36812986>
GMDCOM.27936 : Process Request <36812987>
GMDCOM.27936 : Process Request <36812996>
GMDCOM.27936 : Process Request <36812998>
GMDCOM.27936 : Process... (14 Replies)
Discussion started by: ghosh_tanmoy
14 Replies
9. Red Hat
Hello all
I have a query (SQL) that returns a rather long field from an Oracle database. The field in question is defined on 400 characters but all these 400 cannot be displayed by the echo command. Thus when I launch the following command:
echo "SELECT FIELD01 FROM TABLE_NAME;" | sqlplus -s... (9 Replies)
Discussion started by: S. BASU
9 Replies
10. UNIX for Beginners Questions & Answers
Hi,
I have an array, that works well. But, I want to have it display every other line. Like so, 1, 3, 5, 7, etc, etc.
Here is the relevant code:
I'm sorry for the pastebin link. For some reason, I can't get the code to format properly with the code tags.
code tags work fine... everyone... (4 Replies)
Discussion started by: ignatius
4 Replies
cat(1) General Commands Manual cat(1)
Name
cat - concatenate and print data
Syntax
cat [ -b ] [ -e ] [ -n ] [ -s ] [ -t ] [ -u ] [ -v ] file...
Description
The command reads each file in sequence and displays it on the standard output. Therefore, to display the file on the standard output you
type:
cat file
To concatenate two files and place the result on the third you type:
cat file1 file2 > file3
To concatenate two files and append them to a third you type:
cat file1 file2 >> file3
If no input file is given, or if a minus sign (-) is encountered as an argument, reads from the standard input file. Output is buffered in
1024-byte blocks unless the standard output is a terminal, in which case it is line buffered. The utility supports the processing of 8-bit
characters.
Options
-b Ignores blank lines and precedes each output line with its line number.
-e Displays a dollar sign ($) at the end of each output line.
-n Precedes all output lines (including blank lines) with line numbers.
-s Squeezes adjacent blank lines from output and single spaces output.
-t Displays non-printing characters (including tabs) in output. In addition to those representations used with the -v option, all tab
characters are displayed as ^I.
-u Unbuffers output.
-v Displays non-printing characters (excluding tabs and newline) as the ^x. If the character is in the range octal 0177 to octal 0241,
it is displayed as M-x. The delete character (octal 0177) displays as ^?. For example, is displayed as ^X.
See Also
cp(1), ex(1), more(1), pr(1), tail(1)
cat(1)