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db_command_tutorial [2015/05/22 11:31]
stephdl [Auto completion]
db_command_tutorial [2015/05/22 12:17]
stephdl
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-===== Database variables ​=====+===== Db command tutorial ​=====
  
 NethServer comes with the most used parameters set as variables in its internal configuration databases. These variables are used to store values to be used in the final configuration files. Please, read the [[http://​docs.nethserver.org/​projects/​nethserver-devel/​en/​latest/​databases.html|Database howto]], the [[http://​docs.nethserver.org/​projects/​nethserver-devel/​en/​latest/​templates.html|template howto]] and the [[http://​docs.nethserver.org/​projects/​nethserver-devel/​en/​latest/​events.html#​signalling-events|event howto]] to understand the template and database process. NethServer comes with the most used parameters set as variables in its internal configuration databases. These variables are used to store values to be used in the final configuration files. Please, read the [[http://​docs.nethserver.org/​projects/​nethserver-devel/​en/​latest/​databases.html|Database howto]], the [[http://​docs.nethserver.org/​projects/​nethserver-devel/​en/​latest/​templates.html|template howto]] and the [[http://​docs.nethserver.org/​projects/​nethserver-devel/​en/​latest/​events.html#​signalling-events|event howto]] to understand the template and database process.
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   signal-event nethserver-php-save   signal-event nethserver-php-save
  
-The first line changes the value for the memory limit of PHP, the second line regenerates the configuration file and the last line will reload Apache (and subsequently also PHP as this is configured as module of Apache).+The first line changes the value for the memory limit of PHP, the second line regenerates the configuration file and restart apache.  
 +<WRAP center round alert 60%> 
 +**The signal-event ​is a mandatory to apply the modification** 
 +</​WRAP>​
  
 <WRAP center round tip 60%> <WRAP center round tip 60%>
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 Like in every Linux shell you can use the TAB key when you use the command line to auto complete or propose all available answers Like in every Linux shell you can use the TAB key when you use the command line to auto complete or propose all available answers
 +
 +=====Usage=====
 +<WRAP center round tip 60%>
 +Use of '​config'​ is a shorthand version for 'db configuration'​ and therefore only works with the configuration database
 +</​WRAP>​
 +====Keys/​Properties/​values====
 +
 +All turn around A key with properties and values of the properties, no more, no less. You can have a lot of properties under a key which is unique
 +
 +  # db configuration show passwordstrength ​   <- database => configuration
 +   ​passwordstrength=configuration ​            <- Key (type = configuration) ​
 +     ​Admin=strong ​                            <- property (value = strong)
 +     ​Ibays=strong ​                            <- property (value = strong)
 +     ​MaxPassAge=180 ​                          <- property (value = 180)
 +     ​MinPassAge=0 ​                            <- property (value = 0)
 +     ​PassExpires=yes ​                         <- property (value = yes)
 +     ​PassWarning=7 ​                           <- property (value = 7)
 +     ​Users=strong ​                            <- property (value = strong)
 +
 +
 +Apply the above "​reasoning"​ to any database and the the syntax presented by issuing db then makes sense.
 +
 +Note that missing (or no) properties and values do not necessarily mean no value is in the /​etc/​file.conf system, as the template code can have a default value in the absence of a specific db value.
 +
 +Note to determine what db settings are supported by sme code, or what the default values are, refer to (ie read) the code that is in the particular template or custom template associated with a /​etc/​file.conf
 + 
 +Look in /​etc/​e-smith/​templates/​... and /​etc/​e-smith/​templates-custom/​....
 +and subfolders and template fragments applicable to particular /​etc/​file.conf configuration files.
 +
 +
 ====show all available databases==== ====show all available databases====
 To show a list of existing databases do To show a list of existing databases do
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 Note after using the |less switch, press Enter to scroll down a line at a time, or press Space to scroll down a page at a time. '​q'​ to quit. Note after using the |less switch, press Enter to scroll down a line at a time, or press Space to scroll down a page at a time. '​q'​ to quit.
-=====Usage===== 
-<WRAP center round tip 60%> 
-Use of '​config'​ is a shorthand version for 'db configuration'​ and therefore only works with the configuration database 
-</​WRAP>​ 
- 
 ====Create a  key in a database==== ====Create a  key in a database====
 the generic command is : the generic command is :
   db dbfile set key type [prop1 val1] [prop2 val2] ...   db dbfile set key type [prop1 val1] [prop2 val2] ...
  
-  dbfile : choose the database in /home/e-smith/db+  dbfile : choose the database in /var/lib/​nethserver/db/
   key : the name of key   key : the name of key
   type : generally '​service'​ or '​configuration'​ but it can be other things as webbapps or url or ...   type : generally '​service'​ or '​configuration'​ but it can be other things as webbapps or url or ...
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-  dbfile : choose the database in /home/e-smith/db+  dbfile : choose the database in /var/lib/​nethserver/db/
   key : the name of key   key : the name of key
  
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 for example for example
-  db configuration setprop plop WpLang ​<​nowiki>​''​</​nowiki>​+  db configuration setprop plop WpLang ''​
 or or
-  config setprop plop WpLang ​<​nowiki>​''​</​nowiki>​+  config setprop plop WpLang ''​
  
 <WRAP center round tip 60%> <WRAP center round tip 60%>
db_command_tutorial.txt · Last modified: 2019/06/05 21:48 (external edit)