| Icinga – Notes section in markdown language |
Not sure since what version this feature is available but I have started to use the notes section of the services i am monitoring in Icinga in markdown syntax.
icingaweb2 package version 2.6 that is compiled for Debian 10 (Buster).
Package: icingaweb2
Version: 2.6.2-3You may think you do not need it for, but in my humble opinion it is … Read more
| Checkpoint – Policy installation failed. Error code: 0-2000040 |
This morning i have come across a Checkpoint problem: No way to perform a succesful policy installation in any of the several virtual system gateways I have in my environment.
As you can see the returning error is: Policy installation failed on the gateway. If the problem persists contact Check Point support [Error code: 0-2000040].
Fortunately i found a generic … Read more
| Linux – SQL Server command line to perform queries (mssql-cli) |
There are different methods to run queries against an SQL Server from a Linux machine. The one I am using is mssql-cli (https://github.com/dbcli/mssql-cli)
As you can check in the related github website, it has the following features:
It has been packetized for a lot of distributions … Read more
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| Linux – Show git branch in bash prompt |
If you are a Git user, you can find very useful this custom prompt.
Shows working branch when it detects the current folder is a git one:
user1@labdebian ~/data $
user1@labdebian ~/data $ cd ../myproject/
user1@labdebian ~/myproject (master) $user1@labdebian ~/myproject (master) $ git checkout -b branch1 Switched to a new branch 'branch1' user1@labdebian ~/myproject (branch1) $ user1@labdebian ~/myproject… Read more
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| Linux – Join to Windows domain (realm command) |
Dont be afraid. Joining a linux machine to a windows active directory domain is not difficult. This post explains step by step how to join a Debian or Ubuntu linux machine but it can applied for other distributions without much different commands.
apt-get install realmdIt may happen that the command returns an error like … Read more
| F5 BIG-IP – Authentication using active directory |
By default F5 BigIp configuration utility uses local users to authenticate.
But if your enviroment allows it, using another way like Active Directory, LDAP, RADIUS might be very interesting. This post focuses in Active Directory but, anyway, it can point you and be a great help to configure for another type of server.
So, follow these easy steps:
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| Checkpoint – /var/log full (possible cause) |
Yesterday I realized (after checking the backup of one of my gateways was failing) that the /var/log partition was 100% full:
[Expert@vsx1:0]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_splat-lv_current 31G 21G 9.0G 70% /
/dev/md0 289M 130M 145M 48% /boot
tmpfs 32G 0 32G 0% /dev/shm
/dev/mapper/vg_splat-lv_log 146G 146G 0 100% /var/log
Surprinsingly, it used to have … Read more
| Powershell – Could not create SSL/TLS secure channel |
I use Powershell to send monitoring results to the Icinga API (passive checks). For example, to check if the Exchange backups were processed correctly, I run a Exchange powershell and then the results are sent using “Invoke-WebRequest” command.
Since I disabled obsolete and insecure TLSv1 and TLSv1.1 protocols in the Exchange server, the script was not working anymore returning error:… Read more
| Exchange – Bulk import of distribution group members from csv |
A short but useful post:
Suppose you need to import hundreds of members to a distribution group.
The list is in a CSV file:
Name,Email
user1,user1@domain1.com
user2,user2@domain2.com
user3,user3@domain3.com
user4,user4@domain4.com
user5,user5@domain5.com
user6,user6@domain6.com
user7,user7@domain7.com
user8,user8@domain8.com
user9,user9@domain9.com
user10,user10@domain10.com
user11,user11@domain11.com
user12,user12@domain12.com
user13,user13@domain13.com
user14,user14@domain14.com
user15,user15@domain15.com
user16,user16@domain16.com
user17,user17@domain17.com
user18,user18@domain18.com
...
To bulk import all the users, a simple command like this is enough:… Read more
| Nextcloud – Error modifying files or folders: locked error |
Yesterday I came across a problem in which I tried to modify (rename, delete, …) a folder and it returned an error.
Nextcloud logs (/var/www/nextcloud/data/nextcloud.log) showed the following:
"reqId":"Pf4KW9q1WDVe1YdmG0Mt","level":3,"time":"2019-09-10T16:36:53+00:00","remoteAddr":"63.223.129.127","user":"user1","app":"no app in context","method":"DELETE","url":"\/remote.php\/dav\/files\/user1\/ALBUMS\/New%20folder","message":{"Exception":"OCP\\Lock\\LockedException","Message":"\"files\/8010dab5adf49336ecdaf75a2008d5ab\" is locked","Code":0,"Trace":[{"file":"\/var\/www\/html\/nextcloud\/lib\/private\/Files\/Storage\/Common.php","line":779,"function":"changeLock","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files\/8010dab5adf49336ecdaf75a2008d5ab",2]},{"file":"\/var\/www\/html\/nextcloud\/lib\/private\/Files\/Storage\/Wrapper\/Wrapper.php","line":615,"function":"changeLock","class":"OC\\Files\\Storage\\Common","type":"->","args":["Nueva carpeta",2,{"__class__":"OC\\Lock\\DBLockingProvider"}Enter maintenance mode
sudo -u www-data php occ maintenance:mode --on
Then, all entries of the table oc_file_locks … Read more
