On 2011-10-11, at 16:19 , Simon Urbanek wrote: > > On Oct 11, 2011, at 6:24 AM, Marius Hofert wrote: > >> Hi, >> >> I have multiple R versions installed and would like to switch between them >> via setting the symblic link "Current". To make this a bit more convenient, >> I defined two "aliases" in .bashrc: >> >> alias R2.13='d=/Library/Frameworks/R.framework/Versions; rm $d/Current; ln >> -s $d/2.13 $d/Current' >> alias R2.14='d=/Library/Frameworks/R.framework/Versions; rm $d/Current; ln >> -s $d/2.14 $d/Current' >> > > Try > > ln -sfn 2.13 /Library/Frameworks/R.framework/Versions/Current >
Dear Simon, thanks, I put it in the alias. It now looks like this: alias R2.13='d=/Library/Frameworks/R.framework/Versions; rm $d/Current; ln -sfn $d/2.13 $d/Current' (and similarly for R 2.14) > You'll need to be admin of the computer, otherwise you'll need sudo If I execute (in a new shell, as usual) R2.13, I (still) get: bash-3.2$ R2.13 rm: /Library/Frameworks/R.framework/Versions/Current: Permission denied ln: /Library/Frameworks/R.framework/Versions/Current: Permission denied So the obvious would be to "sudo R2.13", but I obtain: bash-3.2$ sudo R2.13 Password: sudo: R2.13: command not found > or change permissions. Note that for symlinks you'll need extra -h in chown > otherwise you're changing ownership of the target not the link. This I also realized :-) I tried that: sudo chown -h myuser /Library/Frameworks/R.framework/Versions/Current bash-3.2$ ls -al total 8 drwxrwxr-x 5 root wheel 170 Oct 11 15:54 . drwxrwxr-x 9 root wheel 306 Oct 11 11:38 .. drwxrwxr-x 8 root wheel 272 Oct 11 12:16 2.13 drwxrwxr-x 6 root wheel 204 Oct 11 11:38 2.14 lrwxr-xr-x 1 myuser wheel 45 Oct 11 15:54 Current -> /Library/Frameworks/R.framework/Versions/2.13 bash-3.2$ => okay, root was changed to myuser, that's good. But again, I get bash-3.2$ R2.13 rm: /Library/Frameworks/R.framework/Versions/Current: Permission denied ln: /Library/Frameworks/R.framework/Versions/Current: Permission denied > If in doubt (ie., you messed with permissions before), run sudo chmod g+w -R > /Library/Frameworks/R.framework okay, thanks a lot, that's good to know. > > Cheers, > Simon > > >> On executing R2.13 in the terminal, I get: >> rm: /Library/Frameworks/R.framework/Versions/Current: Permission denied >> ln: /Library/Frameworks/R.framework/Versions/Current/2.13: Permission denied >> >> If I chown Current, I still get: >> rm: /Library/Frameworks/R.framework/Versions/Current: Permission denied >> >> I (bad) solution is to put in "sudo" in the alias... >> >> How is it done correctly? >> >> Cheers, >> >> Marius >> >> PS: I also posted it for future reference, I've only found the idea of using >> ln -s on the help pages/FAQ, but not how to get around the permission issue. >> _______________________________________________ >> R-SIG-Mac mailing list >> R-SIG-Mac@r-project.org >> https://stat.ethz.ch/mailman/listinfo/r-sig-mac >> >> > ETH Zurich Dr. Marius Hofert RiskLab, Department of Mathematics HG E 65.2 Rämistrasse 101 8092 Zurich Switzerland Phone +41 44 632 2423 marius.hof...@math.ethz.ch http://www.math.ethz.ch/~hofertj _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-mac