Email this page
Send a link

Shell scripting

Table of contents



Archive dmesg on reboot

This small script will log dmesg on booting and tail 100 lines of messages on shutdown.

Preparing directory
mkdir /root/dmesg-archive

Put the following in /usr/local/etc/rc.d/dmesg-archive.sh and chmod 755 it.
#!/bin/sh

DATE=`/bin/date "+%Y-%m_%H-%M-%S"`

case "\$1" in

        start)
                /sbin/dmesg > /root/dmesg-archive/dmesg_$DATE
                ;;
        stop)
                /usr/bin/tail -100 /var/log/messages > /root/dmesg-archive/messages_$DATE
                ;;
        *)
                echo ""
                echo "Usage: `basename \$0` { start | stop }"
                echo ""
                exit 1
                ;;
esac

toggle Advanced Search Help
  • + : A leading plus sign indicates that this word must be present in every object returned.
  • - : A leading minus sign indicates that this word must not be present in any row returned.
  • By default (when neither plus nor minus is specified) the word is optional, but the object that contain it will be rated higher.
  • < > : These two operators are used to change a word's contribution to the relevance value that is assigned to a row.
  • ( ) : Parentheses are used to group words into subexpressions.
  • ~ : A leading tilde acts as a negation operator, causing the word's contribution to the object relevance to be negative. It's useful for marking noise words. An object that contains such a word will be rated lower than others, but will not be excluded altogether, as it would be with the - operator.
  • * : An asterisk is the truncation operator. Unlike the other operators, it should be appended to the word, not prepended.
  • " : The phrase, that is enclosed in double quotes ", matches only objects that contain this phrase literally, as it was typed.

Menu

Search

in:

Help