46 lines
1.2 KiB
Markdown
46 lines
1.2 KiB
Markdown
# User Management
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|Command|Description|
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|sudo adduser \<user\>|Create a new user|
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|sudo userdel \<user\>|Delete a user|
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|sudo usermod -aG \<group\> \<user\>|Add a user to group|
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|sudo deluser \<user\> \<group\>|Remove a user from a group|
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# CRON
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|Field|Allowed Values|Description|
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|Second|0 - 59|Trigger every SECOND second(s)|
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|Minute|0 - 59|Trigger every MINUTE minute(s)|
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|Hour|0 -23|Trigger every HOUR hour(s)|
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|Day|1 - 31|Trigger every DAY day(s) of month|
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|Month|1 - 12|Trigger every MONTH month(s)|
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|Doay of Week|0 - 6|MON-SUN Trigger on specific DAY OF WEEK|
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# Special Characters
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|Special Character|Description|
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|*|Trigger on tick of every time unit|
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|,|List separator|
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|-|Specifies a range|
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|/|Defines an increment|
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# Examples
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|Cron Expression|Description|
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|0 * * * *|Executes every minute|
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|0 0 * * * *|Executes every hour|
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|0 0 0 * * *|Executes every day|
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|0 0 0 0 * *|Executes every month|
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|0 0 0 1 1 *|Executes on first day of Jan each year|
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|30 20 * * SAT|Executes at 08:30pm every Saturday|
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|30 20 * * 6|Executes at 08:30pm every Saturday|
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|0 */5 * * * *|Executes every five minutes|
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|0 0 8-10/1 * * *|Executes every hour between 8am and 10am| |