State.sh

state.sh

#!/bin/sh -x

now=`date "+%Y%m%d%H%M%S"`

savepath=/root/system_state/${now}
mkdir -p ${savepath}


/sbin/lsmod | sort                                   > ${savepath}/lsmod
cat /proc/cpuinfo                                    > ${savepath}/cpuinfo
dmesg                                                > ${savepath}/dmesg
crontab -u root -l                                   > ${savepath}/crontab.root
cp /etc/crontab                                        ${savepath}/crontab.etc
cp /etc/sudoers                                        ${savepath}/sudoers
/sbin/ifconfig -a                                    > ${savepath}/ifconfig
df -h | sort                                         > ${savepath}/df-h
cat /etc/mtab                                        > ${savepath}/mtab
/bin/netstat -avpn 2>/dev/null                       > ${savepath}/netstat-avpn
/bin/netstat -rn                                     > ${savepath}/netstat-rn
/sbin/lsmod | sort                                   > ${savepath}/lsmod.sorted
if [ -e /bin/systemctl ]
then
 /bin/systemctl -a -l --no-legend --no-pager | sort  > ${savepath}/systemd.all.long
else
 /sbin/chkconfig --list                               > ${savepath}/chkconfig-list
 /sbin/service --status-all                          > ${savepath}/service-status
fi
/sbin/iptables-save                                  > ${savepath}/iptables-save
uname -a                                             > ${savepath}/uname-a
rpm -q -a --qf "%{INSTALLTIME}\t%{INSTALLTIME:date}\t%-30{NAME}\t%-10{VERSION}\t%{RELEASE}\t%{ARCH}\n" | sort -rn > ${savepath}/rpm.qa.sorted

With this script you can easily collect state and later you can "diff -r datex datey"

you might alos like this alias for diffing directories:

alias diffss='diff --width=180 --suppress-common-lines --side-by-side'

also I like to add --exclude=dmesg

diff --width=180 --suppress-common-lines --side-by-side --exclude dmesg