Here our requirement is to remove all the whitespace from the leading and ending space per line of a file.
Our sample file /tmp/file
This is line one
This is line two
This is line three
This is line four
Remove all leading whitespace
To remove all tab whitespace (This will not remove empty space)
# sed 's/^[ ]*//g' /tmp/file
This is line one
This is line two
This is line three
This is line four
As you see the "tab" space is still there
To remove all leading whitespaces (including tabs)
# sed 's/^[t ]*//g' /tmp/file
This is line one
This is line two
This is line three
This is line four
Remove all trailing whitespace
To remove all trailing whitespaces (including tabs)
# sed -i 's/[t ]*$//g' /tmp/file
Remove both leading and trailing whitespaces
# sed 's/^[t ]*//g;s/[t ]*$//g' /tmp/file
This is line one
This is line two
This is line three
This is line four
Here I have combined both the commands with ";"
Hi everybody, Thanks you all, I used your very useful idea.
I have a problem with my bash scripting, it is:
I have several files in several directories. At the beginning of each line there are few blank spaces, one, two, three, tab and more. These blank space are fine,I want to keep them.
but inside each line there are also blank spaces which I want to delete all of them. I am using sed, tr, ed commands but they delete also the Blank spaces through all the lines and the files, I do not want to delete the blank spaces at the beginning of the lines,
I appreciate if someone can help me.
Regards
Shirzad