Date of latest d-u

[mylo]

Hi all,

how can I find out when I made the last d-u on my installation?

[piper]

/var/log/apt/history.log

[musca]

Hello,
you can have a script reading the log for you.

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$ awk 'BEGIN {latest="not yet this month"} /dist-upgrade/ { latest=last"  "$0;} { last=$0; } END { print latest }' /var/log/apt/history.log
Start-Date: 2015-10-05  23:46:46  Commandline: apt dist-upgrade


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$ perl -wlne 'BEGIN {$latest="not yet this month"} /dist-upgrade/ and $latest="$last  $_"; $last=$_; END { print $latest }' /var/log/apt/history.log
Start-Date: 2015-10-05  23:46:46  Commandline: apt dist-upgrade


That perl example seems to imitate the awk style. I'm sure there are other solutions, that are more "perlish".

greetings
musca

[der_bud]

Uh, those look very awkish and perlish for my simple mind . I generate a bit more output with

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grep 'dist-upgrade' /var/log/apt/history.log -a1 If too much, could be followed by |tail -2 ).

[musca]

agreed, you don't need awk or perl when you have bash.

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$ (latest="not yet this month"; while read line; do [[ $line =~ dist-upgrade ]] && latest="$last $line"; last="$line "; done ; printf "$latest\n") </var/log/apt/history.log
Start-Date: 2015-10-05  23:46:46  Commandline: apt dist-upgrade


and you can do it with lua:

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$ lua -e 'latest="not yet this month"; for line in io.lines() do if string.find(line,"dist%-upgrade") then latest=last.."  "..line end last=line end io.write(latest.."\n")' </var/log/apt/history.log
Start-Date: 2015-10-05  23:46:46  Commandline: apt dist-upgrade

greetings
musca

[mylo]

Thanks for your hinter, I will try all of them!