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+
+[[Installation]]
+
+[[Userland]]
+
+[[Qemu]]
+
+[[Custom Ebuild Repo]]
+
+[[Kernel]]
+
+
+what is /var/cache/distfiles/...
+eclean-dist -dp
+
+
+all batteries info in /sys/class/power_supply
+
+
+# fix mpv from segfault
+- For information, I will repeat here the workaround, it may help for others :
+- emerge app-portage/cpuid2cpuflags
+- launch cpuid2cpuflags
+- create a var CPU_FLAGS_X86 containing the output of this command in your /etc/portage/make.conf
+- re emerge media-video/ffmpeg
+
+
+
+
+
+
+# bashrc portage - run post hook
+
+mkdir -p /etc/portage/postinst.d/
+chmod 755 /etc/portage/postinst.d/
+
+
+
+vim /etc/portage/bashrc
+#!/bin/bash
+
+POSTINST_BASE="/etc/portage/postinst.d/"
+
+post_pkg_postinst()
+{
+	local POSTINST_SCRIPT
+
+	if [[ "x${CATEGORY}" == "xvirtual" ]']
+	then
+		return 0
+	fi
+
+	for POSTINST_SCRIPT in ${POSTINST_BASE%/}/{all,${CATEGORY}/{${P}-${PR},${P},${PN}}{:$SLOT},}}
+	do
+		if [[ -x "${POSTINST_SCRIPT}" ]']
+		then
+			einfo "Running post-installation script ${POSTINST_SCRIPT} ..."
+			"${POSTINST_SCRIPT}"
+		fi
+	done
+}
+
+then put script in
+/etc/portage/postinst.d/sys-kernel/gentoo-kernel-bin
+(with a shebang and make it executable)
+chmod +x
+script will be run as root - set -eu on top script ???