I've found one way so far: less +G filename, but it's scroll up only with up key line by line. What's more powerful less usages which provide scrolling by page, pattern search backward and so on?
I'm sure someone else has a better answer, but
With "less" after you've opened the file:
G goes to the bottom of the file ^b goes up one page ? searches backwards.
As you said, you can open the file with +G and then use ? and ^b to scroll up. There are likely clever awk things you can do to achieve the same thing in a script.
I'm surprised nobody brought this up before, but:
?pattern searches for pattern backwards.
N finds the previous match of the pattern (that is, searching backwards).
/pattern searches for pattern forward and
n finds the next match of the pattern. That's the way the search is commonly used.
Perhaps some people did not understood what dr01 meant. I try to put it in other words.
- Open the file in less
- Forward search: Enter the key /
- Backward search: Enter the key ?
- For both of the preceding: Enter your search term now
- Press enter
- Press n to search for the next finding
- Press N to search for the previous finding