I have lftp process running for days at a time on a CentOS machine. I read the lftp man pages and discovered the attach command. However when I call it with the respective process id from the lftp shell I get Unknown command "attach".
Any suggestions?
There could be a few reasons:
lftp version is lower than 4.3.0, see Changes. According to this answer:
The Debian stable version might not have the attach feature though, but you can still list the active lftp processes with pgrep.
But you can trick the shell if you set cmd:move-background-detach setting to false and use the fg command to bring lftp back. See man page.
On stable Debian.
After being disconnected (computer entered sleep mode) I simply reconnected in ssh, cd to the local dir, logged in to external server via lftp and did same command again
mirror -c --parallel=10
And it resumed
