get ffmpeg sources and install build dependencies
mkdir ffmpeg-cuda
cd ffmpeg-cuda
apt-get source ffmpeg
sudo apt build-dep ffmpeg
patch the debian/rules to enable cuda (cuda dev packages need to be installed)
--- ffmpeg-3.4.2/debian/rules.orig 2018-03-18 00:08:00.717540941 +0100
+++ ffmpeg-3.4.2/debian/rules 2018-03-18 00:11:53.506937275 +0100
@@ -187,6 +187,8 @@
--target-os=$(DEB_HOST_ARCH_OS)
endif
+CONFIG += --enable-cuda --enable-cuvid --enable-nvenc --enable-nonfree --enable-libnpp --enable-cuda-sdk
+
# Use the default debhelper scripts, where possible.
%:
dh $@
build it
cd ffmpeg-3.4.3
time nice dpkg-buildpackage -rfakeroot -uc -b -j5
the build will generate a bunch of *.deb files, they will conflict with the one installed by the system, so
mkdir install
for f in *.deb; do dpkg -x $f install; done
create a wrapper to use the built libraries (ffmpeg-cuda)
#!/bin/sh
export LD_LIBRARY_PATH=$INSTALL_PATH/usr/lib/x86_64-linux-gnu:$LD_LIBRARY_PATH
exec $INSTALL_PATH/usr/bin/ffmpeg "$@"
use it to encode, for instance
ffmpeg-cuda -hwaccel cuvid -c:v h264_cuvid -i "$1" -vf scale_npp=1280:720 -c:v h264_nvenc "$2"
ffmpeg-cuda -i "$1" -c:v h264_nvenc "$2"
by default debian/stretch apache2 installation have mod_rewrite disabled (at least the one used with debootstrap and lxc containers) so few steps are needed to enable it and .htaccess files
enable mod_rewrite (apache2 must be restarted, see below)
a2endmod rewrite
in the virtual host configuration enable .htaccess (apache2 must be restarted, see below)
<Directory "/var/www/htdocs">
AllowOverride All
</Directory>
optionally enable mod_rewrite log (in the virtual host configuration) output goes into error.log (don’t leave it enabled in production) note: rewrite engine may need to be enabled before (apache2 must be restarted, see below)
RewriteEngine On
LogLevel alert rewrite:trace6
restart apache
systemctl restart apache2
Assuming you’ve apache2 already installed and a reachable internet server running
apt-get install dehydrated
Add/edit /etc/apache2/conf-available/letscrypt.conf (notice the difference between the alias and the real directory which is plural acme-challenges):
Alias /.well-known/acme-challenge/ "/var/lib/dehydrated/acme-challenges/"
<Directory "/var/lib/dehydrated/acme-challenges/">
Options None
AllowOverride None
# Apache 2.x
<IfModule !mod_authz_core.c>
Order allow,deny
Allow from all
</IfModule>
# Apache 2.4
<IfModule mod_authz_core.c>
Require all granted
</IfModule>
</Directory>
Add/edit /etc/dehydrated/conf.d/99_email.sh:
CONTACT_EMAIL="anymail@yourdomain"
Edit /etc/dehydrated/domains.txt, set the domains for which generate certificates.
Restart apache2 and run dehydrated -c, it should create the domain certs.
Edit your apache’s host file (/etc/apache2/sites-available/default-ssl.conf), replace DOMAIN with your domains:
SSLCertificateFile /var/lib/dehydrated/certs/DOMAIN/fullchain.pem
SSLCertificateKeyFile /var/lib/dehydrated/certs/DOMAIN/privkey.pem
Add/edit /etc/cron.daily/dehydrated:
#!/bin/sh
exec /usr/bin/dehydrated -c >/var/log/dehydrated-cron.log 2>&1
Run chmod 0755 /etc/cron.daily/dehydrated
Add/Edit /etc/logrotate.d/dehydrated:
/var/log/dehydrated-cron.log
{
rotate 12
monthly
missingok
notifempty
delaycompress
compress
}
Some quick note.
sudo apt-get install lxc debootstrap
create from mirror with debootstrap
sudo MIRROR=http://httpredir.debian.org/debian lxc-create -n sid64 -t debian -- -r sid -a amd64
create a container from lxc template (default jessie, the host is 64)
sudo lxc-create -t /usr/share/lxc/templates/lxc-debian -n debian
create a container from lxc debian template, pass lxc-debian argument after --
sudo lxc-create -t /usr/share/lxc/templates/lxc-debian -n debian2 -- -r stretch
-d daemon (background)
sudo lxc-start -n sid64 -d
sudo lxc-stop -n sid64
-F foreground
sudo lxc-start -n sid64 -F
change root password
sudo lxc-attach -n sid64 passwd
list container->dhcp ip
sudo lxc-ls --fancy
mount host directory inside the container
lxc.mount.entry=/host/dir /var/lib/lxc/{container-name}/rootfs/dir none bind 0 0
create a copy of the container using overlayfs
sudo lxc-copy -s -B overlayfs -n {base-container} -N {new-container-name}
sudo apt-get install libvirt-clients libvirt-daemon-system ebtables dnsmasq
sudo virsh net-info default
# /var/lib/libvirt/network/default.xml
sudo less /etc/libvirt/qemu/networks/default.xml
always same ip by mac addr
<dhcp>
<range start="192.168.122.100" end="192.168.122.254" />
<host mac="00:FF:AA:00:00:01" name="foo.example.com" ip="192.168.122.101" />
<host mac="00:FF:AA:00:00:02" name="bar.example.com" ip="192.168.122.102" />
</dhcp>
sudo virsh net-start default
/sbin/ifconfig -a
sudo vi /var/lib/lxc/{container-name}/config
lxc.network.type = veth
lxc.network.flags = up
lxc.network.link = virbr0
lxc.network.hwaddr = 00:FF:AA:00:00:01
lxc.network.ipv4 = 0.0.0.0/24
bridge autostart (optional)
sudo virsh net-autostart default
sudo virsh net-info default
configure host br0 and add eth0 to it, /etc/network/interfaces:
auto br0
iface br0 inet static
address 192.168.2.210
netmask 255.255.255.0
network 192.168.2.0
broadcast 192.168.2.255
gateway 192.168.2.1
bridge-ifaces eth0
bridge-ports eth0
up ifconfig eth0 up
iface eth0 inet manual
edit /var/lib/lxc/{container}/config:
lxc.network.type = veth
lxc.network.flags = up
lxc.network.link = br0
lxc.network.hwaddr = 00:FF:AA:00:00:10
lxc.network.ipv4 = 192.168.2.20/24
lxc.network.ipv4.gateway = 192.168.2.1
Setting timezone for apache/php/mysql (logs timestamp also)
# apache2 on debian (it get system tz)
dpkg-reconfigure tzdata
# this doesn't work (maybe useful for .htaccess/vhosts?)
echo "SetEnv TZ Europe/Rome" > /etc/apache2/conf-available/tz-rome.conf
service apache2 reload
# php
echo 'date.timezone = "Europe/Rome"' > /etc/php5/apache2/conf.d/30-tz-rome.ini
# mysql (untested)
default-time-zone = "Europe/Rome"
reference: askubuntu
First erased the current update-alternatives setup for gcc and g++:
sudo update-alternatives --remove-all gcc
sudo update-alternatives --remove-all g++
Install Packages
It seems that both gcc-4.3 and gcc-4.4 are installed after install build-essential. However, we can explicitly install the following packages:
sudo apt-get install gcc-4.3 gcc-4.4 g++-4.3 g++-4.4
Install Alternatives
Symbolic links cc and c++ are installed by default. We will install symbol links for gcc and g++, then link cc and c++ to gcc and g++ respectively.
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.3 10
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.4 20
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.3 10
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.4 20
sudo update-alternatives --install /usr/bin/cc cc /usr/bin/gcc 30
sudo update-alternatives --set cc /usr/bin/gcc
sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++ 30
sudo update-alternatives --set c++ /usr/bin/g++
Configure Alternatives
The last step is configuring the default commands for gcc, g++. It’s easy to switch between 4.3 and 4.4 interactively:
sudo update-alternatives --config gcc
sudo update-alternatives --config g++
Makefile:
all: deb
deb:
mkdir -p tmp/usr/bin tmp/DEBIAN tmp/etc tmp/usr/share/man/man5 tmp/usr/share/man/man8
find tmp -type d | xargs chmod 755
cp apt-fast.conf tmp/etc/
cp man/apt-fast.8 tmp/usr/share/man/man8/
cp man/apt-fast.conf.5 tmp/usr/share/man/man5/
cp apt-fast tmp/usr/bin/
tar c --owner root --group root -v -z -f tmp/data.tar.gz -C tmp ./etc ./usr
cd tmp && find usr/ etc/ -type f | xargs md5sum >DEBIAN/md5sums
awk '/^#Package:/{i++}i {print substr($$0,2); }' Makefile >tmp/DEBIAN/control
tar c --owner root --group root -v -z -f tmp/control.tar.gz -C tmp/DEBIAN ./control ./md5sums
echo 2.0 >tmp/debian-binary
ar rcv apt-fast_1.8-1.deb tmp/debian-binary tmp/control.tar.gz tmp/data.tar.gz
.phony: clean
clean:
-rm -fr tmp
#Package: apt-fast
#Version: 1.8
#Section: net
#Priority: optional
#Architecture: all
#Essential: no
#Installed-size: 100
#Maintainer: Name <mail here>
#Source: https://github.com/ilikenwf/apt-fast
#Depends: aria2
#Description: apt-get wrapper with aria2 as backend downloader
# apt-fast is a shellscript wrapper for apt-get and aptitude
# can drastically improve apt download times
# by downloading packages in parallel
# with multiple connections per package.
mkdir -p ~/src/chromium-deb
cd ~/src/chromium-deb
apt-get source chromium
sudo apt-get build-dep chromium
time dpkg-buildpackage -rfakeroot -uc -b -j4 # DEB_BUILD_OPTIONS=nostrip
28439,94s user 6571,60s system 280% cpu 3:28:10,43 total
du -sh ~/src/chromium-deb
12G
compiling take an average of 2G RAM or less but the final link is critical 3.5G+
source: Make apt-get MUCH faster using aria2!
see also: apt-metalink
sudo apt-get install aria2
apt-get -y --print-uris -qq upgrade|python2.6 apt2metalink.py > tmp.meta4
sudo aria2c -d /var/cache/apt/archives/ -M tmp.meta4 --file-allocation=none
apt2metalink.py:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# reference: http://ubuntuforums.org/showthread.php?t=1493421
import sys
import re
if __name__ == "__main__":
entries = []
while True:
line = sys.stdin.readline()
if not line: break
uri, name, size, chksum = line.split()
uri = re.sub(r"^'|'$", "", uri)
hashfunc, hashvalue = chksum.split(':')
hashfunc = hashfunc.lower()
if hashfunc == 'sha256':
hashfunc = 'sha-256'
entries.append((uri, name, size, hashfunc, hashvalue))
print """<?xml version="1.0" encoding="UTF-8"?>
<metalink xmlns="urn:ietf:params:xml:ns:metalink">"""
for e in entries:
print """<file name="{name}">
<size>{size}</size>
<hash type="{hashfunc}">{hashvalue}</hash>
<url priority="1">{uri}</url>
</file>""".format(uri=e[0],name=e[1], size=e[2], hashfunc=e[3], hashvalue=e[4])
print """</metalink>"""
one shell script:
#!/bin/sh -e
apt-get -y --print-uris -qq upgrade|awk '
BEGIN {
print "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
print "<metalink xmlns=\"urn:ietf:params:xml:ns:metalink\">"
}
{ gsub(/\x27/,"",$1);
split($4, chksum, /:/)
printf "<file name=\"%s\">",$2
printf "<size>%d</size>", $3
printf "<hash type=\"%s\">%s</hash>", chksum[1], chksum[2]
printf "<url priority=\"1\">%s</url>", $1
print "</file>"
}
END {
print "</metalink>"
}'|aria2c -M- --file-allocation=none -d /var/cache/apt/archives/