A few useful links. Some have nothing to do with science and LSCE hardware/software resources!
NNNN(last 4 digits) to call somebody at LSCE (or CEA Saclay) from LSCE
It's very important that you update your phone/office information when you arrive at LSCE, so that other people can find you using the tools above!
Use the following sequence of keys on the Mitel phone in your office:
01 69 08 NN NN
It is important to join the correct mailing lists, if you want to get all the information you need, on time.
When your account is created, your email address should automatically be added to the the all list, that can be used to send mails to all the people working at LSCE. You will also get IPSL information through this list
|firstname.lastname@example.org||Everybody at LSCE|
|email@example.com||People working at Orme|
|firstname.lastname@example.org||People working in Gif|
Mails sent to these lists will reach lots of people. Think well before sending a mail to these lists!
Ask your team leader to add you to your team's mailing list. Example below: the CLIM and ESTIMR lists
You can't connect your personal laptop to the LSCE wired network (aka ethernet), it will not work!
The best you can do is use the Guest WiFi or eduroam network, if your office is close enough to one of the access points.
Warning! You can't connect directly to the obelix LSCE servers from the wifi network. You first have to connect to the
ssh1.lsce.ipsl.fr gateway server, and then to
obelix. More details in LSCE servers
If you try to access the intranet from outside the LSCE network (including eduroam), your browser will open a
password popup window.
Use your LSCE login (not your email address!) and password
jdoe and not
Intranet web site: https://intranet.lsce.ipsl.fr/
There is a lot of information available on the LSCE intranet, but you can only access it from a computer connected to the LSCE network
Everything about the LSCE servers (and other software and hardware information): https://intranet.lsce.ipsl.fr/informatique/en/orme/index.php
It used to be possible to access the CEA Saclay intranet by just clicking on http://www-saclay.cea.fr/ from any computer on the LSCE network.
This is not possible anymore, now that LSCE is on the Paris-Saclay network (and not on the CEA network)
Use the following steps:
You should receive a desktop/laptop connected to the LSCE network when you arrive. Please take the time to read the instructions below, that may help make your life easier
Read the Windows 10 notes, especially the Configuring Windows 10 section
If an application requests administrator's rights to install something or make changes to the computer, and you are sure it's not a virus, use the
.\admin local account and the
admin password you received when your computer was configured, or ask the system administrators.
There are different window managers available, each one with different settings: you should the Cinnamon window manager (xfce is a bit too basic, and Gnome is not very convenient for doing actual work, and uses too much CPU). You can select the window manager by clicking on the little cogwheel below the password field, on the login screen.
This is Linux, you are using it for work, you should be efficient, so you should be able to do most of your work by typing commands in a terminal. The true power is in the correct use of the command-line interfaces, rather than having to spend time finding where to click in the windows. You will find some Linux documentation below.
Depending on what you need to do:
Sorry, you are (almost) on your own, but a Mac is soooo easy to use, right?
Some useful mac links:
If you have a Linux computer, but need to use a Windows application, follow the instructions in the Windows servers page.
If you need to use a program that is missing on the Windows cluster, see the Help section.
You have to use ssh to connect to the LSCE Linux servers, and use scp to copy files between servers
If you are really in a hurry, go directly to the Connecting to servers commonly used by LSCE users section, but it is important that you read the full ssh documentation page at least once!
Always remember that your local LSCE desktop/laptop can access remote disks on the LSCE servers.
There are lots of things you can do directly on your local computer (displaying pdf, images, using a text editor, …), rather than on the remote servers. For example, if a script running on the servers generates a pdf file, it is more efficient to open this pdf file using
evince on your local computer, than by using
evince on the server.
ssh obelixto access these servers, and the load balancing system will send you to the server that has currently the smallest load.
$ ssh obelix Last login: Mon Jun 3 08:49:53 2019 from somewhere # You can use one of the following commands if you want to know on which obelix you are $ echo $HOST obelix5 $ hostname obelix5
Xclusters have replaced the
climservcluster (in 2022)
It is important to know which shell you are using if you need to configure and tune your Linux account. The shell is basically the program that waits for you to type commands in a terminal and passes them to the computer
If you are not sure which shell is running in your terminals, you can use
echo $SHELL to find out:
# Somewhere with tcsh > echo $SHELL /bin/tcsh # Somewhere else with bash $ echo $SHELL /bin/bash
If the Linux server you are working on seems slow, or if you want to get an idea of the resources you are using, you should use the
>hostname obelix3 >top top - 17:48:51 up 8 days, 23:43, 29 users, load average: 1.22, 1.38, 1.98 Tasks: 324 total, 2 running, 320 sleeping, 2 stopped, 0 zombie Cpu(s): 12.6%us, 0.0%sy, 0.0%ni, 87.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 32877756k total, 14706188k used, 18171568k free, 21372k buffers Swap: 33554428k total, 1628972k used, 31925456k free, 14105940k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 10193 john 20 0 302m 4336 2272 R 100.0 0.0 7033:08 emacs 16504 john 20 0 110m 2008 1228 S 0.7 0.0 0:00.13 tcsh 26344 jane 20 0 1635m 20m 3880 S 0.3 0.1 0:44.90 ipython 1 root 20 0 21448 1108 892 S 0.0 0.0 0:01.61 init [...]
The top lines give you some summary information about the system, but you should monitor the memory usage (
TIME columns. By default,
top will will put the processes using the more CPU at the top (as shown above). You can see above that the
emacs text editor has clearly crashed, because it should not use 100% CPU for such a long time
If you type
M, the processes will be sorted my memory usage, as shown below
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 16092 bob 20 0 8488m 8.1g 7912 R 99.6 25.9 1:41.38 idl 23256 john 20 0 232m 70m 2632 S 0.0 0.2 0:01.36 R 26344 jane 20 0 1635m 20m 3880 S 0.0 0.1 0:44.87 ipython 10619 bob 20 0 954m 9292 2664 S 0.0 0.0 0:40.67 gedit 1362 nslcd 20 0 442m 6056 2208 S 0.0 0.0 2:13.98 nslcd 10193 john 20 0 302m 4336 2272 R 99.9 0.0 7024:13 emacs [...]
Other useful keys:
|c||Display the command line options of the running processes|
|u||List only the processes of a specific user|
quota -scommand to find out the exact amount
It is possible to directly access some disks on the LSCE servers from:
For security reasons, only backed up disks and
scratch01 can be accessed from Windows with dfs
e.g. if you have a
/home/scratch01/your_lsce_login path on a Linux server, you can access it the following way from your desktop/laptop:
ccc_home -hto find out all the available options)
ls -ato see hidden files and directories). Ask your advisor if you should copy somebody else's configuration files
scratch01or a project specific disk)
limit column, and you cannot stay more than 7 days above the limit displayed in the
gracecolumn will display either
None(you cannot write on the disk anymore, unless you get below the
N days(you can use the disk, but you have
N daysto go below the
> quota -s Disk quotas for user johndoe (uid 6369): Filesystem blocks quota limit grace files quota limit grace prolix3:/users/ 4658M 4883M 4981M 23503 0 0
You should store your source codes, scripts, notebooks, manuscripts, reports, figures, on a backed up directory, and only store on the project disks data downloaded from outside, or that you can regenerate with the backed up scripts
Your Linux environment may sometimes stop working correctly because you have exceeded the allowed quota on your disks (check your quotas with
quota -s). You can use the following command to get the size of all the directories and files in the current directory, sorted by size:
du -sh * | sort -rh
>cd /home/scratch01/johndoe /home/scratch01/johndoe >du -sh * | sort -rh 58M GLAC1DHiceF26.nc 47M dashboard 44M GLAC1DdrainagePointerF26ka.nc 15M octcdf 12M 1901.nc 3.2M cmake ...
Your advisor will let you know which (version of which) programs you should use. Some programs are available by default, and you have to use the
module command to access other programs.
At any time, you can use the
which command to determine where a program is located. The option to get the version information of a program may vary (launch the program without arguments, with
> which ncdump /usr/bin/ncdump > ncdump ncdump [-c|-h] [-v ...] [[-b|-f] [c|f]] [-l len] [-n name] [-p n[,n]] [-k] [-x] [-s] [-t|-i] [-g ...] [-w] file [...] netcdf library version 220.127.116.11 of Dec 10 2015 16:44:18 $ > which python /usr/bin/python > python --version Python 2.7.5
module list: list the currently loaded modules
module avail: list the available modules
module load module_a … module_n: load modules (automatically including dependencies)
module load module_a: load default version of module_a
module load module_a/vvv: load
vvvversion of module_a
module purge: remove all modules
> which ncview ncview: Command not found. > module list No Modulefiles Currently Loaded. > module avail [...] batch_env grib_api/1.14.0 netcdf/4 python/3.6 [...] glost/0.3.1 ncview/2.1.7 python/2.7 > module load ncview netcdf/4 > module list Currently Loaded Modulefiles: 1) ncview/2.1.7 2) netcdf/4 > which ncview /usr/local/install/ncview-2.1.7/bin/ncview > which ncdump /usr/local/install/netcdf-4.3.2/bin/ncdump
You need a correct text editor to efficiently work with scripts and programs
There are lots of text editors available on Linux computers/servers (
gedit, …). You can use them:
nano) fortunately display some help at the bottom of the screen
Notepad++ is a nice and powerful text editor for Windows, but it is also very easy to install emacs on Windows
ncdump -k data.ncif you need to know the format)
ncdumpoptions. People usually want to quickly check the metadata, and use other programs to work with the actual data
ncdump some_climate_data_file.nc: dump the full content to text
ncdump -h some_climate_data_file.nc: only display the metadata
Check the dedicated section of the Python page
Send a mail to help-lsce
When you need help from the administrators or other people, it will save a lot of time if you describe your problem as accurately as possible (do not just report XXXXX is not working as expected !)
You can copy-paste the error message(s). Finding the error log file(s) of the program/system (when available), or using the verbose mode of a program will make the problem resolution much easier and faster. The example below shows how to use the verbose mode of
>ssh -v obelix OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017 debug1: Reading configuration data /home/users/johndoe/.ssh/config debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 58: Applying options for * debug1: Connecting to obelix [18.104.22.168] port 22. debug1: Connection established. debug1: key_load_public: No such file or directory debug1: identity file /home/users/johndoe/.ssh/id_rsa type -1 [...] debug1: Entering interactive session. debug1: pledge: exec debug1: client_input_global_request: rtype email@example.com want_reply 0 debug1: Requesting X11 forwarding with authentication spoofing. debug1: Sending environment. debug1: Sending env LANG = en_US Last login: Thu Mar 1 15:52:44 2018 from lsce4078.lsce.ipsl.fr >
Sometimes, it may also help to send a picture of what is wrong!
On Linux, you should find a screenshot application in the tools available on the system. See the example below for people using the xfce windows manager
On Windows, you can use Snip & Sketch, or the Capture screen option of XnView
Check the Contacts page
Ask you advisor, who has probably already told you everything that was listed above, so you did not really learn anything new by reading this page
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