Shell Programming and Scripting

Since you are using quotes where there should not be any since they are not part of the search string. Also in you replacement text you left out the space so it would be a replacement, not an append. Thirdly there is no g flag, so the replacement only happens once per line.

Try:

Code:

sed 's/ /&ABC/g'

I have output such as

(SPACEBEFORE->)9
10
11

There is a space before the 9 and I cannot figure out how to remove it with sed.

If I do sed s/ /&abc/g

my output should be:
abc9
10
11
Correct?

...

If I do sed s/ //g
It just removes the entire line and leaves an empty line before the 10.

But you send you wanted to , in other words, to append it. If you want to replace each space you should use :

Code:

sed 's/ /ABC/g'

Don't forget the quotes, they are important.

Be careful with spaces though, they could be tabs (\t)...

I think the problem I am having is that they are tabs

Code:

# sed 's/ 9//' file

--> delete all line before 10

Code:

# sed 's/ //' file

--> delete space every lines just one time

Code:

# sed 's/ //g' file

--> delete all spaces every lines all time

Code:

# sed 's/ /&9/g' file

--> change all spaces every lines with space+9 (why ? because our string is space -> that matches --> & symbol)

then try:

Code:

's/[ \t]*/ABC/'

to replace any space character before the first non-space character with ABC

Why is it that when I take data and store it in a variable with grep, that it creates a space after every single piece of data except for the first chunk?
For example,

my output is
400
500
600
700
800
900
I store 400 500 600 700 800 900 in A by doing

A=`(i used grep to single out this set of data )|head -6|awk '{print $6}'`
( $6 is the 6th column within my data set )
I echo $a

and only 900 is shown in A, however.... if I do -5 it->( outputs 800 ) or -4 it ->( outputs 700 ) -3 it ->( outputs 600 ).... why is that?



Also

My numbers do have something in front of them Than I cannot explain...
I can only get my code to work with the FIRST line ( 100 )and the first line has no spaces or anything in front of it.
Further explanation...

NOSPACESHERE100
_200
_300
_400
_500
etc...
there are spaces before 200 300 400 500 which are making this stressful... are they carriage returns...tabs?