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institute_lorentz:gnulinux_workstations [2018/01/29 13:06]
lenocil [GNU/Linux Workstations]
institute_lorentz:gnulinux_workstations [2018/10/08 07:43]
lenocil [Local disks]
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 ===== 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
 home:/​export/​home 3170555392 1260111360 1910444032 ​ 40% /home home:/​export/​home 3170555392 1260111360 1910444032 ​ 40% /home
 </​code>​ </​code>​
-Each user has an **allocated quota**__Underlined Text__ ​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): ​
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                  ​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 ====
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 /​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.
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 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>​
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 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
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 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