Preciso instalar o Tesseract, que precisa instalar o autoconf automake libtool. No entanto, recebi o erro da seguinte maneira:
sahu@sahu-desktop:/$ sudo apt-get install autoconf
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package autoconf is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'autoconf' has no installation candidate
Então por favor me ajude.