Replace command

[markbusu]

Hi Guys,

I have a document, which contains a series of numbers such as:

0
21
551
1
1
2
1
1
5
0

Now, i would like to find a method of parsing the entire document, and replacing any 0s with 1s, therefore the example above would become:

1
21
551
1
1
2
1
1
5
1

Any idea of a command to achieve this?

Thanks!

[dxqcanada]

Read up on "sed"

[markbusu]

Thanks... that did the trick:

sed 's/string1/string2/g'

Cheerz!

[markbusu]

Hi once again, hit a bump here...

If you run the following:

sed s/0/1/g yourfile > newfile

If the number has a 10, this will change to 11... :S

I need to change 0 to 1, only if it is a whole 0 not 10, 100, 101 etc....

I tried sed s/"0"/1/g, however no luck...

Is there any way around this???

thanks!

[shawn.rin]

~~~spot closely...

[markbusu]

You'll have to put the sed argument in double quotes or it will interpret the $ as the start of a variable:

sed -e "s/^0$/1/"

However, for some strange reason, it doesn't work in a script.... only when executed directly...

Can you check it out and let me know if you get the same results??

Thanks!

[vsemaska]

Actually you have to use single quotes otherwise the $ will be interpeted. Although the way it's used in the sed command in this case it doesn't seem to matter. I tried it in a script and it worked for me.

#!/bin/bash -vx

echo "0"|sed -e "s/^0$/1/"
+ echo 0
+ sed -e 's/^0$/1/'
1
exit
+ exit

[markbusu]

Thanks m8!! That did it!