1. Assignment: Install a debian ssh server on a VirtualBox and access to it
config apt-cacher 192.168.10.1 port 3128
sed -i 's#http://#http://192.168.10.1:3142/#g' /etc/apt/sources.list
install emacs
sudo aptitude install emacs
install config openssh server and make it work
eval `ssh-agent` exec ssh-agent bash (if ssh-add is not working)
add sam_sshkey.pub to .ssh/authorized_keys
add to /etc/ssh/sshd_config:
AllowUsers xxx
changed in the same file:
PasswordAuthentication no PermitRootLogin no
If ssh doesn't work check the grp and own of .ssh/authorized_keys
install bash completion
aptitude install bash-completion
add the following to ~/.bashrc or ~/.bash_profile
if [ -f /etc/bash_completion ]; then . /etc/bash_completion fi
Document the work done
Well, that's kind of done but the editing interface of the wiki is not yet clear to me. Few shortcut:
- create a code box:
{code 'Enter'
- heading
'ctrl' AND '1' XOR '2' XOR '3'
- bullet list
'shift' AND 'ctrl' AND 'b'
- bold, underline, italic
'ctrl' AND 'b' 'ctrl' AND 'u' 'ctrl' AND 'i'
- save
'ctrl' AND 's'
Problems encountered after installation of debian
On start and halt
PROBLEM:
exim paniclog /var/log/exim4/paniclog has non-zero size, mail system possibly broken
SOLUTION:
rm /var/log/exim4/paniclog
need to start the network manually dhclient eth0
PROBLEM: when auto eth0 added to interfaces. Nfs interfaces gets stuck on boot.
SOLUTION: there was no 'auto lo' in /etc/network/interfaces. That added plus 'auto eth0' makes it work.
2. Assignement: Install a graphic interface on Debian installation
Install Debian with nothing else than the minimum (except for laptop)
Install XOrg
apt-get install xorg
Install Gnome
apt-get install gnome-core
to test the installation:
starx
change the resolution
CTRL + ALT + '+' and CTRL + ALT + '-'
screen the available resolution and change it
xrandr -q wrands -s resolution
Install a display manager
apt-get install gdm
to start it
gdm
Install proprietary graphic card drivers:
If the kernel isn't compiled you need to install the kernel headers.
Check the kernel version
uname -r
Install the kernel header and link it to the linux file
apt-get install linux-header-... rm /usr/src/linux ln -s /usr/src/linux-header-... /usr/src/linux
Install the compilers
apt-get install gcc g++
For the nvidia cards
Download the latest drivers from the nvidia website.
Stop gdm (might need a kill)
/etc/init.d/gdm stop
Install the driver
sh NVIDIA...
Don't download the kernel interface. Ask for a compilation of a new interface. Start xconfig ans restart gdm
nvidia-xconfig /etc/init.d/gdm restart
To remove the logo in xorg.conf
Option "NoLogo" "1"
3. Assignment: Install Amanda & use it
Installation
create the directory structure for the folders to keep the backup
mkdir /mnt/backup #mount $DISK /mnt/backup/ mkdir /mnt/backup/vtapes /mnt/backup/holding /mnt/backup/holding/sam chown backup.disk -R /mnt/backup/*
create the config in /etc/amanda
mkdir /etc/amanda/sam-daily touch /etc/amanda/sam-daily/amanda.conf touch /etc/amanda/sam-daily/disklist chown -R backup.backup /etc/amanda/sam-daily
/etc/amanda/sam-daily/amanda.conf
org "sam"
mailto "root"
dumpcycle 7
runspercycle 5
tapecycle 30
dumpuser "backup"
tpchanger "chg-disk:/mnt/backup/vtapes/sam" # a virtual tape changer
#tapedev "/dev/nst0a" # the tapechanger
#tapedev "file:/mnt/backup/vtapes/offering"
changerfile "/var/lib/amanda/sam/changerfile"
labelstr "SAM.*"
label_new_tapes "SAM-%%"
tapetype DVD_SIZED_DISK
logdir "/var/lib/amanda/sam"
infofile "/var/lib/amanda/sam/curinfo"
indexdir "/var/lib/amanda/sam/index"
tapelist "/var/lib/amanda/sam/tapelist"
runtapes 5
#usetimestamps YES
dtimeout 3600 #seconds per client per dump
holdingdisk hd1 {
directory "/mnt/backup/holding/sam"
}
define dumptype comp-tar {
program "GNUTAR"
index yes
# record no # Important! avoid interfering with production runs
auth "bsdtcp"
}
define dumptype user-tar-span {
comp-tar
tape_splitsize 445 MB
auth "bsd"
#holdingdisk no
#split_diskbuffer "/mnt/holding/diskbuffer"
#fallback_splitsize 100M
comment "tape-spanning user partitions dumped with tar"
#exclude list "/etc/amanda/sam-daily/exclude-list"
}
define dumptype user-tar-span-home {
user-tar-span
comment "exluding all the unwanted things from /home"
# exclude list "/etc/amanda/sam-daily/exclude-list"
}
define tapetype DVD_SIZED_DISK {
filemark 4 KB
length 4482 MB
}
echo debian-server-test-sam.bluelight.av backup amdump >> /var/backups/.amandahosts
/etc/amanda/sam-daily/disklist
debian-server-test-sam.bluelight.av /etc user-tar-span
debian-server-test-sam.bluelight.av /var user-tar-span
debian-server-test-sam.bluelight.av /root user-tar-span
#debian-server-test-sam.bluelight.av /home/./all /home/ {
#user-tar-span
#exclude append "./media_no_backup"
#}
as the backup user create all the virtual tapes and label them
su backup -c "mkdir /mnt/backup/vtapes/sam" for i in `seq 30`; do su backup -c "mkdir /mnt/backup/vtapes/sam/slot$i"; done cd /mnt/backup/vtapes/sam && ln -s slot1 data
create the tapelist
su backup -c "mkdir /var/lib/amanda/sam" su backup -c "touch /var/lib/amanda/sam/tapelist"
label the tapes
for i in `seq 30`; do su backup -c "/usr/sbin/amlabel sam-daily SAM-$i slot $i"; done
/root/scripts/amanda-backup (after creating the folder)
#!/bin/bash
#mount ${DISK} /mnt/backup
su backup -c "/usr/sbin/amdump sam-daily"
#sleep 5
#umount /mnt/backup
exit 0
chmod +x /root/scripts/amanda-backup
Recover
Create the directory where the recovery should be dumped in: /mnt/recovery
In order to be able to run a recovery add the following line to /etc/amandahosts
localhost root amindexd amidxtaped
Go to the /mnt/recovery folder
amrecover sam-daily listhost sethost debian-server-test-sam.bluelight.av listdisk setdisk /etc cd (folder name - ls works too) add (name of the folder to recover or * for everything) extract exit
Problems encountered
...amanda.conf ...Line 54: end of line expected
SOLUTION: Press 'ENTER' at the end of the file and save.