Three problems with Ubuntu 20.04 under Windows WSL

Question

When using 'gcc' -Os option not accepted

sleep command produces sleep: cannot read realtime clock

Can no longer perform:

sudo cat XXX >> YYY

Results in Permission denied where XXX and YYY are owned by root

I'll expect sudo cp XXX >> YYY to fail since cp needs a destination operand instead. — Kulfy, May 01 '20 at 08:13
When using 'gcc' -Os option not accepted. Sleep is a separate issue sleep command produces sleep: cannot read realtime clock. Sorry I meant to say sudo cat XXX >> YYY — Ken-unix.guy, May 01 '20 at 18:01
In sudo cat XXX >> YYY, sudo was attached to the cat not the text redirection. That's why permissions were denied. See How to solve “permission denied” when using sudo with redirection in Bash? — Kulfy, May 02 '20 at 15:39
Thanks. I ended using cat AAA | sudo tee -a BBB >/dev/null That works across platforms like Ubuntu, Debian, Linux Mint at the suggestion of a friend. — Ken-unix.guy, May 03 '20 at 16:58
What are you trying to achieve? What errors do you encounter while running gcc -Os? As of now it seems you're asking 2 questions in a single question which might make this question too broad. Consider asking one question in a post. — Kulfy, May 07 '20 at 15:45
At this point I am using gcc -s instead of gcc -Os -Os was supposed to be for size optimized. And yes , there were two different questions. — Ken-unix.guy, May 08 '20 at 21:40

score -1 · Answer 1 · answered May 08 '20 at 21:46

-1

Under Ubuntu 20.04 gcc -Os for optimize for size does not work am using gcc -s

and cat issue has been fixed with cat AAA | sudo tee -a BBB >/dev/null

And the shell 'sleep' command not working on WSL turned out to be a 'libc' issue.

answered May 08 '20 at 21:46

Ken-unix.guy

1 Answers1