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Emulab FAQ: Software Setup: Locking complaints during compilation

While compiling software on Emulab, you may encounter complaints similar to this one:

+ autoreconf -i
autom4te: cannot lock autom4te.cache/requests with mode 2 (perhaps you
are running make -j on a lame NFS client?): Permission denied 

Typically, you do not want to build your software across NFS. It puts an excessive load on our NFS server, which we discourage with a variety of mechanisms... :-)

Please build your software on "local disk" on your experimental node. Copy your software to local disk and then build it. (Remember that your user home directory and project/group directories are remote across NFS, not local.)

If you need more disk space on your local node, type "mkextrafs" into the Emulab search box to find out how to create another whole file system.