Oracle Universal Installer... Checking swap space: 493 MB available, 500 MB required. Failed

After installing the patch i decided to relink all binaries. The relinking procedure is very simple:

$ cd $OH/bin
$ ./relink all 

But in my environment i got a unpleasant message:

" Starting Oracle Universal Installer...

Checking swap space: 493 MB available, 500 MB required.    Failed <<<<

Some requirement checks failed. You must fulfill these requirements before
continuing with the installation,

Exiting Oracle Universal Installer ...  "

Because I'm on the Linux, then the fastest solution is to make additional swap file.
It can be done online:

# free
# df -h
# dd if=/dev/zero of=/swapfile bs=1M count=100
# chmod 0600 /swapfile
# mkswap /swapfile
# swapon /swapfile
# df -h
# free

And relink  say:

"Starting Oracle Universal Installer...

Checking swap space: must be greater than 500 MB.   Actual 593 MB    Passed
Preparing to launch Oracle Universal Installer ..."


To revert changes (online): 
#  swapoff /swapfile
#  rm /swapfile