11

I generally pipe the command ls with less and would like to execute a command while it is paging e.g. I come across a file that I would like to delete so I would like to execute the command rm {filename} whilst still paging. I would also like to hope I can use the same method while perusing man pages. If not how is it different?

2 Answers 2

10

You can access the command line using bang (!) within less.

So for example, if you type:

touch temp.txt
ls | less
!rm temp.txt

And temp.txt should be gone.

Edit: By default it seems that man now uses less to page (for some reason I thought it used more, maybe in the past it did). You can use the same trick, but it requires the full path (eg. /home/user/...) to get it to work.

This is because invoking man changes the current working directory. On my machine (xubuntu, using xfce-terminal) it goes to /usr/share/man. If your console displays the CWD you can see it change, or you can see it from within man by entering:

!pwd
8
  • man actually changes CWD, so you would need to use the full path.
    – Rob
    Dec 19, 2012 at 18:46
  • @Rob - What do you mean that man actually changes CWD? Dec 19, 2012 at 18:51
  • I have tmux set up to show my CWD in my status bar. Doing man man (or anything) will change my CWD while man is open. My linux machine isn't available at the moment, and I'm not sure of any other way to check CWD, but to me it seems like that's what it's doing.
    – Rob
    Dec 19, 2012 at 19:56
  • @Rob - So you mean to say that just because you are using tmux, it changes the current working directory when you run the command man {command} from say /home/{user} to a location of the command man? Dec 19, 2012 at 20:54
  • That would explain the behaviour I saw. Now, why it's changing the CWD, that's another question...
    – Ash
    Dec 19, 2012 at 21:24
5

The generic way to do this is by suspending the current job, executing the command and resuming the old job.

ls | less (read text, notice the filename)
Control-z to suspend the current active command

You should get a line similar to this:[1]+ Stopped ls | less
([1] is the job number.)

rm testfile

fg or fg %1 (the 1 is the job number)

You can suspend multiple processes at the same time. E.g.
ls | less
Control-z (output: [1]+ Stopped ls | less)
man rm
Control-z (output: [2]+ Stopped man rm)
rm -i testfile*

fg %1 to resume job 1 (leaving the man page open in the background), or
fg %2 to resume job 2 (man rm)

If you have multiple suspended processes you can list them with jobs.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .