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Hi

I have a text file which contains the following.

AAA,BBB,CCC,DDD
AAA,BBB,CCC,DDD
AAA,BBB,CCC,DDD

How can I replace all CCC with 888, with other contents inside the file remain unchange?...

sorry about the typo mistake...
this time...I would like to concanate the contents of file B with contents of file A, then for the resulted output, I would like overwrite it into file A, as shown...

I Have Two Files, A And B. How Can I Rewrite Them Into A New File With The Following Pattern?

File A
123
456
789

File B
235
478
987

Become

123 235
456 478
987 789
...

Hi

May I know how can I use grep command to do the following operation?

Example:

Case1
ABC=1

Hello
How are you?

Case 2
ABC=2

Hello
How do you do

Case 3
ABC=3

after issuing
awk ' BEGIN { FS=","} { if (NR == 2) { $2 = 777 ;$1 = 888 } print } ' filename
command, I found that the line that I edited seperator become a blank. How can I set it back to comma?...

I have set to = but for the following error.

if: Expression syntax.

can anyone tell me what`s going wrong with my if else statement?


set exam=(AAA BBB CCC)

foreach ii ($exam)
if ($ii -eq "AAA")
do
echo "PASS"
else
echo "FAILED"
done
end

i field seperators that I want in line 2 and line 3 are different. In this case, I need to define field seperator twice, don`t I?

awk ' { BEGIN { FS=","};if (NR == 2) { $2 = 777 ;$1 = 888 }; BEGIN { FS=" "};if (NR == 3) { $3 = 555 } print } ' filename

may i know whether the above syntax correctly defined the fiels seperator...

may i know how can I specify field seperator as comma? (or other sign like $, . and etc)?

may i know how awk command count the number of words in a line?
for example
123,134,156 - is it counted as one words only? or 5 words?

If I wish to modify only 123 and 134 to 555 and 333...

Hi

may I know whether the following syntax is correct or not? if not, what should be the correct one?

awk ' { if (NR == 2) { $2 = 777 $1 = 888 } if (NR == 3) { $3 = 555 } print } ' filename

if I have 2 nested foreach loop and I have two conditions to satisfy in switch case, how should I correct the syntax below to the correct one?

#! /usr/bin/csh

set exam=(AAA BBB CCC)
set...

hi

can I use awk command to change word 2 on line 2 and word 3 on line 3 into 777 and 555 respectively (for example)? if yes, how should I write the awk syntax?

hi

can anybody help me with the switch syntax?

set exam(AAA BBB CCC)
foreach ii ($exam)
switch ($ii)
case $ii=="AAA"
echo aaa
breaksw
case $ii=="BBB"
echo bbb
breaksw
case $ii=="CCC"...

Hi Jean-Pierre

I thought " and ' are refering to the same thing in unix. After changing " to ', the problem solved. Sorry for all the trouble.

The error that I got when run awk "NR==3 {print "200 3000"; next} 1" unit.dat
is as below.

Syntax Error The source line is 1.
The error context is
NR==3 {print >>> 200 <<<
...

hi

sorry for my unclear description of the problem.

I have two input files (fileA.txt and fileB.txt), and would like to write the contents of two input files into a new file(let says...

Hi

Can anyone help me with the task below?

Example:

The contents in fileA.txt are:
HELLO
HOW DO U DO?

The contents in fileA.txt are:
HI
I AM FINE.

how to combine the data in 2...

Thanks everyone for valuable suggestions.

I tried both commands suggested by aigles but it doesnt work. I got errors which indicating syntax error if I am not mistaken.
However, Shell Life...

Hi

Can anyone tell me how can rewrite a line in a file by using line number? I tried to use sed by failed to do so.
For example

HELLO
179.390 111.560
HOW TO DO
WHAT TO DO

to become
...