User Tools

Site Tools


institute_lorentz:gnulinux_workstations

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
institute_lorentz:gnulinux_workstations [2018/01/29 13:06]
lenocil [The home disk]
institute_lorentz:gnulinux_workstations [2018/10/08 07:43]
lenocil [Local disks]
Line 10: Line 10:
 ===== The home disk ===== ===== The home disk =====
 The home disk is `automounted'​ on boot.  The home disk is `automounted'​ on boot. 
-<​code>​+<​code ​bash>
 $ df /home $ df /home
 Filesystem ​        ​1K-blocks ​      ​Used ​ Available Use% Mounted on Filesystem ​        ​1K-blocks ​      ​Used ​ Available Use% Mounted on
Line 16: Line 16:
 </​code>​ </​code>​
 Each user has an **__allocated quota__** on the home disk depending on their role within the Lorentz Institute. The standard quota is 4GB, nonetheless it is possible to request extra space. To check your quota settings type Each user has an **__allocated quota__** on the home disk depending on their role within the Lorentz Institute. The standard quota is 4GB, nonetheless it is possible to request extra space. To check your quota settings type
-<​code>​+<​code ​bash>
 $ quota -s $ quota -s
 Disk quotas for user xxxxxx (uid 999x99): ​ Disk quotas for user xxxxxx (uid 999x99): ​
Line 23: Line 23:
                  ​12344K ​  ​4786M ​  ​4883M ​            ​279 ​      ​0 ​      ​0 ​       ​                  ​12344K ​  ​4786M ​  ​4883M ​            ​279 ​      ​0 ​      ​0 ​       ​
 </​code>​ </​code>​
-:!: TIP: Regularly check that you are below your assigned quota. Your workstation will stop working correctly if softwares cannot write temporary files in your home folder any more.+:!: Regularly check that you are below your assigned quota. Your workstation will stop working correctly if softwares cannot write temporary files in your home folder any more.
  
 To compile a list of the ten largest files in a directory execute To compile a list of the ten largest files in a directory execute
-<​code>​+<​code ​bash>
 du -h /​home/​your_username/​some_directory | sort -rh | head du -h /​home/​your_username/​some_directory | sort -rh | head
 </​code>​ </​code>​
-Then clean up responsibly.+Then clean up responsibly. ​
  
 ==== Home disk data availability ==== ==== Home disk data availability ====
Line 46: Line 46:
 /​dev/​md0 ​      ​1922599800 27092644 1797821652 ​  2% /data2 /​dev/​md0 ​      ​1922599800 27092644 1797821652 ​  2% /data2
 </​code>​ </​code>​
-Usually ​/data2 is configured as the mount point of a RAID[1|5] stack, meaning that data in it have a certain level of redundancy which can protect against disk failures. Note however, that storing all of your data on /data2 will not prevent loss if all disks in the array configuration ​`die' ​and/​or ​ your computer tower gets destroyed by a fire  or any other disastrous event.+In most cases, **but not always**, ​/data2 is configured as the mount point of a RAID[1|5] stack, meaning that data in it have a certain level of redundancy which can protect against disk failures. Note however, that storing all  data on /​data2 ​in RAID configuration ​will still not prevent ​data loss if all disks in the array `die' your computer tower gets destroyed by a fire  or in any other disastrous event. ​**You are strongly encourage to keep your personal backup of any important data.**
  
-To check if a RAID configuration ​is used on your workstation ​type+To check if any of your workstation'​s disks are arranged in a RAID configuration type
 <​code>​ <​code>​
 $ cat /​proc/​mdstat ​ $ cat /​proc/​mdstat ​
-Personalities : +Personalities : [raid1]  
 +md127 : active raid1 sdd[2] sdc[0] 
 +      1953383488 blocks super 1.2 [2/2] [UU] 
 +      bitmap: 0/15 pages [0KB], 65536KB chunk 
 unused devices: <​none>​ unused devices: <​none>​
 +
 </​code>​ </​code>​
-In the example above there are no disks arranged ​in RAID.+The example above shows that two disks are arranged ​into RAID1 configuration. Check the output of ''​df -l | grep md127''​ to retrieve its mount point information.
  
 :!: The backup of any of the data you might have on the ''/​data[1,​n]''​ falls under your responsibility. :!: The backup of any of the data you might have on the ''/​data[1,​n]''​ falls under your responsibility.
Line 63: Line 68:
 csh  csh 
 </​code>​ </​code>​
 +or change your default interpreter by invoking ''​chsh''​.
 ===== Access to other workstation disks ===== ===== Access to other workstation disks =====
-Partitions ​named data//​1//,​...,​data//​n//​ are usually ​network-shared among all the Lorentz Institute workstations. You can access /data1 on a machine called //​bingo// ​ via /​net/​bingo/​data1. More generally, the pattern to access a data disk on a Lorentz machine is+All data disks named data//​1//,​...,​data//​n//​ are network-shared among all the Lorentz Institute workstations. You can access /data1 on a machine called //​bingo// ​ via /​net/​bingo/​data1. More generally, the pattern to access a data disk on a Lorentz machine is
 <​code>​ <​code>​
 /​net/<​workstation>/​data<​n>​ /​net/<​workstation>/​data<​n>​
Line 74: Line 80:
  
 Here we only give a summary of useful commands. Here we only give a summary of useful commands.
-<​code>​+<​code ​bash>
 # shows which environment modules are available # shows which environment modules are available
 module avail module avail
Line 87: Line 93:
 Should you need assistance operating your workstation,​ please do not hesitate to request help via our [[https://​helpdesk.lorentz.leidenuniv.nl/​|helpdesk]] application. You can also visit our offices in the Huygens Laboratory Room 409b at any time during working hours. Should you need assistance operating your workstation,​ please do not hesitate to request help via our [[https://​helpdesk.lorentz.leidenuniv.nl/​|helpdesk]] application. You can also visit our offices in the Huygens Laboratory Room 409b at any time during working hours.
    
-Comments and suggestions to improve this guide are welcome.+
  
institute_lorentz/gnulinux_workstations.txt · Last modified: 2018/10/08 07:43 by lenocil