%general-entities; ]> The structure of LFS follows Linux standards as closely as possible. The primary standards are: The Single UNIX Specification Version 3 (POSIX). Note: Free registration is required. Filesystem Hierarchy Standard (FHS) Linux Standard Base (LSB) Core Specification 4.0 The LSB has five separate standards: Core, C++, Desktop, Runtime Languages, and Printing. In addition to generic requirements there are also architecture specific requirements. LFS attempts to conform to the architectures discussed in the previous section. Many people do not agree with the requirements of the LSB. The main purpose of defining it is to ensure that proprietary software will be able to be installed and run properly on a compliant system. Since LFS is source based, the user has complete control over what packages are desired and many choose not to install some packages that are specified by the LSB. Creating a complete LFS system capable of passing the LSB certifications tests is possible, but not without many additional packages that are beyond the scope of LFS. Most of these additional packages have installation instructions in BLFS. Packages supplied by LFS needed to satisfy the LSB Requirements LSB Core: Bash, Binutils, Coreutils, Diffutils, File, Findutils, Gawk, Grep, Gzip, M4, Man-DB, Ncurses, Procps, Psmisc, Sed, Shadow, Tar, Util-linux-ng, Zlib LSB C++: Gcc LSB Desktop: None LSB Runtime Languages: Perl LSB Printing: None LSB Multimeda: None Packages supplied by BLFS needed to satisfy the LSB Requirements LSB Core: Bc, Cpio, Ed, Fcrontab, PAM, Sendmail (or Postfix or Exim) LSB C++: None LSB Desktop: ATK, Cairo, Desktop-file-utils, Freetype, Fontconfig, Glib2, GTK+2, Icon-naming-utils, Libjpeg, Libpng, Libxml2, MesaLib, Pango, Qt3, Qt4, Xorg LSB Runtime Languages: Python LSB Printing: CUPS LSB Multimeda: Alsa Libraries, NSPR, NSS, OpenSSL, Java Packages not supplied by LFS or BLFS needed to satisfy the LSB Requirements LSB Core: At, Batch, Install_initd, Lsb_release, Remove_initd, Test LSB C++: None LSB Desktop: None LSB Runtime Languages: None LSB Printing: None LSB Multimeda: Xdg-utils