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Flashcard 7760709291276

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#DAG #causal #edx
Question
the most important take-home message: we need [...] to determine if we should adjust for a variable. The statistical criteria are insufficient to characterize confounding and confounders.
Answer
expert knowledge

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the most important take-home message: we need expert knowledge to determine if we should adjust for a variable. The statistical criteria are insufficient to characterize confounding and confounders.

Original toplevel document (pdf)

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Flashcard 7760710864140

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#Linux
Question

How to delete all files before a certain date in Linux

If you have a list of files, but you only want to delete files older the a certain date, for example, a maildir folder with 5 years worth of email, and you want to delete everything older then 2 years, then run the following command.

find . -type f -mtime +XXX -maxdepth 1 -exec rm {} \;

The syntax of this is as follows.

[...] – signifies the current folder. You can change this to something like /home/someuser/mail/somedomain/someemail/cur or whatever path you nee

Answer
. (dot)

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ars worth of email, and you want to delete everything older then 2 years, then run the following command. find . -type f -mtime +XXX -maxdepth 1 -exec rm {} \; The syntax of this is as follows. <span>. (dot) – signifies the current folder. You can change this to something like /home/someuser/mail/somedomain/someemail/cur or whatever path you nee <span>

Original toplevel document

How to delete all files before a certain date in Linux
How to delete all files before a certain date in Linux Posted on: September 15, 2015 If you have a list of files, but you only want to delete files older the a certain date, for example, a maildir folder with 5 years worth of email, and you want to delete everything older then 2 years, then run the following command. find . -type f -mtime +XXX -maxdepth 1 -exec rm {} \; The syntax of this is as follows. find – the command that finds the files . – the dot signifies the current folder. You can change this to something like /home/someuser/mail/somedomain/someemail/cur or whatever path you need -type f – this means only files. Do not look at or delete folders -mtime +XXX – replace XXX with the number of days you want to go back. for example, if you put -mtime +5, it will delet