Commands from /opt/bin (like nvidia-settings) are not suggested by bash completion for root user. Apparently /opt/bin is not in root user $PATH. # echo $PATH /sbin:/bin:/usr/sbin:/usr/bin # emerge --info Portage 2.2.0_alpha132 (default/linux/amd64/10.0/desktop/kde, gcc-4.6.3, glibc-2.15-r2, 3.4.9-gentoo x86_64) ================================================================= System uname: Linux-3.4.9-gentoo-x86_64-Intel-R-_Xeon-R-_CPU_W3670_@_3.20GHz-with-gentoo-2.1 Timestamp of tree: Tue, 25 Sep 2012 06:00:01 +0000 app-shells/bash: 4.2_p37 dev-java/java-config: 2.1.11-r3 dev-lang/python: 2.7.3-r2 dev-util/cmake: 2.8.9 dev-util/pkgconfig: 0.27.1 sys-apps/baselayout: 2.1-r1 sys-apps/openrc: 0.9.8.4 sys-apps/sandbox: 2.5 sys-devel/autoconf: 2.13, 2.68 sys-devel/automake: 1.9.6-r3, 1.11.6 sys-devel/binutils: 2.22-r1 sys-devel/gcc: 4.6.3 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4-r1 sys-devel/make: 3.82-r3 sys-kernel/linux-headers: 3.4-r2 (virtual/os-headers) sys-libs/glibc: 2.15-r2 Repositories: gentoo enlightenment ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -g -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/themes/oxygen-gtk/gtk-2.0 /usr/share/themes/oxygen-gtk/gtk-3.0" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-march=native -g -O2 -pipe" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--with-bdeps=y --quiet-build=n" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs ccache config-protect-if-modified distlocks ebuild-locks fixlafiles news parallel-fetch preserve-libs protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" INSTALL_MASK="/usr/share/man/cs/" LC_ALL="cs_CZ.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="cs en" MAKEOPTS="-j12 -s" PKGDIR="/usr/portage/packages" PORTAGE_COMPRESS="xz" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/var/lib/layman/enlightenment" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X a52 aac acl acpi alsa amd64 bash-completion berkdb bluetooth branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cups curl cxx dbus declarative dri dts dvd dvdr emboss encode exif fam ffmpeg firefox flac fortran gdbm gif gpm gstreamer gtk iconv inotify ipv6 jpeg kde kipi lcms libnotify lzma mad mmx mng modules mp3 mp4 mpeg mudflap multilib ncurses nls nptl ogg opengl openmp pam pango pcre pdf phonon plasma png policykit ppds pppd qt3support qt4 readline sdl semantic-desktop session spell sqlite sse sse2 ssl startup-notification svg syslog tcpd tiff truetype udev udisks unicode upower usb vdpau vorbis wxwidgets x264 xcb xcomposite xinerama xml xscreensaver xv xvid zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="cs en" PHP_TARGETS="php5-3" PYTHON_TARGETS="python3_2 python2_7" RUBY_TARGETS="ruby19" USERLAND="GNU" VIDEO_CARDS="nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CPPFLAGS, CTARGET, LANG, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
seems to me the path is correct $ grep -r /opt/bin /etc/env.d/ /etc/env.d/00basic:PATH="/opt/bin" /etc/env.d/00basic:ROOTPATH="/opt/bin" $ qfile -v /etc/env.d/00basic sys-apps/baselayout-2.2 (/etc/env.d/00basic) $ sudo env-update --no-ldconfig $ grep /opt/bin /etc/profile.env <relevant PATH and ROOTPATH matches> $ grep ROOTPATH /etc/profile /etc/profile: PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:${ROOTPATH}"
theseus vpelcak # grep -r /opt/bin /etc/env.d/ /etc/env.d/00basic:PATH="/opt/bin" /etc/env.d/00basic:ROOTPATH="/opt/bin" theseus vpelcak # echo $PATH /sbin:/bin:/usr/sbin:/usr/bin theseus vpelcak # qfile -v /etc/env.d/00basic sys-apps/baselayout-2.1-r1 (/etc/env.d/00basic) theseus vpelcak # env-update --no-ldconfig theseus vpelcak # grep /opt/bin /etc/profile.env export PATH='/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.6.3' export ROOTPATH='/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.6.3' theseus vpelcak # grep ROOTPATH /etc/profile PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:${ROOTPATH}" unset ROOTPATH # echo $PATH /sbin:/bin:/usr/sbin:/usr/bin $ echo $PATH /usr/local/bin:/usr/bin:/bin:/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.6.3 See the difference between output of "echo $PATH" ran as root and normal user.
how exactly did you become root ? `su` ? `ssh root@localhost` ?
By su.
that is incorrect. use `su -` to get a login shell.