Accessing server infra
From stgo
>> return to Cedeus IDE
Contents
apt-get
an intro can be found here
- see what is installed
dpkg -l
- info on a particular package
apt-cache show PackageName
- the version of ssl can be obtained using
sudo openssl version -a
- the version of ssl can be obtained using
- upgrade
apt-get upgrade PackageName
or:sudo apt-get install libssl1.0.0
- if I get the message: "n packages can be updated", then do the following:
- sudo apt-get update # Fetches the list of available updates
- sudo apt-get upgrade # Strictly upgrades the current packages
- sudo apt-get dist-upgrade # Installs updates (new ones)
- perhaps reboot
git stuff
- git diff
- git pull
- git status
- git reset --hard HEAD
- git reset HEAD~1
- git reset HEAD opentripplanner-api-webapp/src/main/java/org/opentripplanner/api/ws/analyst/IsoChrone.java
- git log -p
- git add opentripplanner-api-webapp/src/main/java/org/opentripplanner/api/ws/analyst/IsoChrone.java
- git commit -m 'added debug code to be able to figure why some edges are traversed to fast (aside fromom u-shaped roads)'
- gitk
- git push origin master
- git show-ref
- git stash list
- git log origin/master..master
- git fetch upstream
- git remote add upstream https://github.com/openplans/OpenTripPlanner.git
- git remote show origin
- git remote set-url origin git://github.com/mentaer/OpenTripPlanner.git
- git remote set-url origin git@github.com:mentaer/OpenTripPlanner.git
- git diff > /Volumes/WINDOOF/walkingslopeeffects.patch
- patch -p1 -R < IsoChrone2.patch
- git apply --check /Volumes/WINDOOF/IsoChrone.patch
maven stuff
- mvn package -DskipTests
postgres stuff
- echo 'export PATH=/Library/PostgreSQL/9.2/bin:$PATH' >> ~/.bash_profile
- psql
- sudo mkdir /Library/PostgreSQL/9.2/data/
- sudo chown postgres /Library/PostgreSQL/9.2/data/
- sudo -u postgres initdb -D /Library/PostgreSQL/9.2/data/
- service postgresql start
- sudo -u postgres pg_ctl -D /Library/PostgreSQL/9.2/data -l logfile start
- sudo -u postgres postgres -D /Library/PostgreSQL/9.2/data &
- sudo -u postgres createdb santiagotest
- sudo -u postgres createuser -P -s -e mentaer
- psql santiagotest
- to access via terminal use for instance
psql -U sstein -d geonode -h localhost
using VirtualBox
- a VM contains 3 files: .img + .vbox (an editable xml) + .vbox-prev
- " use ssh -X sstein..@xxx to enable a visual client
- vboxgtk (start visual client)
create and start a VM from comandline:
-
VBoxManage createvm --name ubuntu --register
-
VBoxManage modifyvm ubuntu --ostype ubuntu_64 --cpus 4
-
VBoxManage modifyvm ubuntu --memory 8000
-
VBoxManage startvm ubuntu
other:
- options of ip-addressing/web access: NAT (Network Address Translation) or Bridge (see also this blog entry)
- downloading .iso archives/vm from OSGeo (use commands curl or wget -c), e.g.:
wget -c "http://downloads.sourceforge.net/project/osgeo-live/7.0/osgeo-live-7.0.iso?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Fosgeo-live%2Ffiles%2F%2F7.0%2Fosgeo-live-7.0.iso%2Fdownload&ts=1384444616&use_mirror=ufpr"
- showing list of running VMs:
VBoxManage list runningvms
- show list of VMs:
VBoxManage list vms
- powerdown a VM:
VBoxManage controlvm opensuse132 poweroff
- emergency power-off a VM that does not properly shutdown and when restarting there is a message such as:
VBoxHeadless: error: The machine 'opensuse132' is already locked for a session (or being unlocked) VBoxHeadless: error: Details: code VBOX_E_INVALID_OBJECT_STATE (0x80bb0007), component Machine, interface IMachine, callee nsISupports VBoxHeadless: error: Context: "LockMachine(session, LockType_VM)" at line 960 of file VBoxHeadless.cpp
- => solve with:
VBoxManage startvm opensuse132 --type emergencystop
- add user to VBoxuser group to be able to install a VM: <ode>sudo usermod -a -G vboxusers usernane</code>
- => to check in what groups the user is:
groups username
OpenTripPlanner
- start with "sh start-server.sh"; use "&" at the end to keep the process running
- make sure that winstone.jar is executable, with chmod 755
- define in the start-server.sh file also where the webapps folder is located (physical location), so winstone knows that
- define in the WEB-INF/classes/data-sources.xml file where the graph is stored (physical location) - the files is within /otp/webapps/opentripplanner-api-webapp.war (or: the deflated war folder)
- kill winstone server (or OTP) process: use
ps aux | grep winstone
to find the associated PID, and usekill pid
Unix / Linux / Ubuntu commands
http://www.computerhope.com/issues/ch000623.htm
connect to server
- ssh stefan@136.159.xxx.xxx
- ssh sstein@146.155.xxx.xxx.
- transfer a file to a remote computer:
scp /home/username/ftw.txt user@example.com:/home/username/
see processes and find stuff
- pid
- top or: htop
- process
- commands to display/figure out processes: http://www.howtogeek.com/107217/
- (sudo) kill pid, e.g. kill 320
- "sudo shutdown now -h" or "sudo reboot"
- seeing system info:
cat /etc/*-release
+ htop (needs to be installed first) - grep: search for files in the folder /var/.../static/ that contain the string nav-pills with:
grep -r -i "nav-pills" /var/www/geonode/static/
- find files/folders by name:
find / -name game
- to find all ssh/terminal connections (in case one may freeze):
- for a general overview use
who
- to get the pid use:
ps aux | egrep "sshd: [a-zA-Z]+@"
- for a general overview use
user management commands
- create new users - from http://www.digitalocean.com/community/tutorials/how-to-add-and-delete-users-on-an-ubuntu-14-04-vps
- add new user
sudo adduser newuser
- grant a user sudo privileges: type
sudo visudo
then search for the lineroot ALL=(ALL:ALL) ALL
.
- => Now copy and paste this line below, and replace in this new line root by the user's name
- add new user
- adding users to groups - from http://www.cyberciti.biz/faq/howto-linux-add-user-to-group/
- check in what groups the user is:
id username
- add an existing user "myuser" to group "hallogroup":
usermod -a -G hallogroup myuser
- check in what groups the user is:
- switch to work as another user
- switch to work as user tony:
su - tony
- switch to work as root:
sudo su
- switch to work as user tony:
memory related commands
- configuration info: http://www.cyberciti.biz/faq/linux-command-to-find-the-system-configuration-and-hardware-information/
- usage of disk space (free disc space):
df -h
- usage of memory/ram : htop or
free -m
- directory size:
du -h /home/cedeusdbbackupuser/
other useful commands
- used ports:
netstat -a
- monitor network traffic: iftop
- mac addresses:
ifconfig -a
- creating an ISO file from a DVD: mount the DVD. If mounted under /dev/sr0 use:
sudo cat /dev/sr0 > /home/ssteinig/example.iso
- what to do if I get "There are stopped jobs"? see http://unix.stackexchange.com/questions/116959/there-are-stopped-jobs-on-bash-exit
- use
jobs
to check what jobs are still around - use
fg
+ job# to get the job to be able to terminate it later
- use
Installing lightweight XFCE Desktop GUI on Ubuntu Server
- use
sudo apt-get install xubuntu-desktop
to install XFCE client (see here). - this will also install xauth, which allows remote window clients
- disable start of GUI-based login on system startup with Grub (taken from here):
- Change (edit) in /etc/default/grub file:
GRUB_CMDLINE_LINUX_DEFAULT="text"
- then do
sudo update-grub
- Change (edit) in /etc/default/grub file:
- start the desktop GUI session using
startx
- end the desktop GUI session using "logout" button
Enabling Remote Desktop for Windows
got the info from here
- install XRDP:
sudo apt-get install xrdp
- connect via Windows Remote Desktop using the IP etc.
- if not needed, switch off the remote desktop server using:
sudo service xrdp stop
other stuff
- gdalinfo cgydem_fromgrid.tif
- if computer crashs: boot from a LiveDVD and the run
fsck
(see http://www.thegeekstuff.com/2012/08/fsck-command-examples/) - compress:
- uncompress:
- zip files, using:
unzip filename.zip
, - bz2 files with:
bunzip2 filename.bz2
- tar files:
tar -C / -xvzf tarfilename.tgz
. Attention !!! This will restore the data exactly in the same place on the computer, and overwrite existing folders and files.
- zip files, using:
- VBoxManage Windows 8 - 64bit createvm code : "Windows8_64"
- start PhpStorm on my machine:
sh ./dev/PhpStorm-133.1777/bin/phpstorm.sh
- Installing New Harddisk in Ubuntu
- Solving Ubuntu GRUB issue