http://www.linuxfromscratch.org/lfs/view/systemd/chapter02/hostreqs.html bash version-check.sh bash, version 4.4.19(1)-release /bin/sh -> /bin/bash Binutils: (GNU Binutils for Ubuntu) 2.30 bison (GNU Bison) 3.0.4 /usr/bin/yacc -> /usr/bin/bison.yacc bzip2, Version 1.0.6, 6-Sept-2010. Coreutils: 8.28 diff (GNU diffutils) 3.6 find (GNU findutils) 4.7.0-git GNU Awk 4.1.4, API: 1.1 (GNU MPFR 4.0.1, GNU MP 6.1.2) /usr/bin/awk -> /usr/bin/gawk gcc (Ubuntu 8.2.0-1ubuntu2~18.04) 8.2.0 g++ (Ubuntu 8.2.0-1ubuntu2~18.04) 8.2.0 (Ubuntu GLIBC 2.27-3ubuntu1) 2.27 grep (GNU grep) 3.1 gzip 1.6 Linux version 4.15.0-45-generic (buildd@lgw01-amd64-031) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC 2019 m4 (GNU M4) 1.4.18 GNU Make 4.2.1 GNU patch 2.7.6 Perl version='5.26.1'; Python 3.6.7 sed (GNU sed) 4.4 tar (GNU tar) 1.29 texi2any (GNU texinfo) 6.5 xz (XZ Utils) 5.2.2 g++ compilation OK