1、复制/etc/rc.d/rc.sysinit至/tmp目录,将/tmp/rc.sysinit文件中的以至少一个空白字符开头的行的行首加#
[root@server01 tmp]# cp /etc/rc.d/rc.sysinit /tmp/
[root@server01 tmp]# sed -n "s@^[[:space:]]\+@#&@gp" rc.sysinit
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# . /etc/sysconfig/network
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# HOSTNAME=localhost
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# mount -n -t proc /proc /proc
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# mount -n -t sysfs /sys /sys >/dev/null 2>&1
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# modprobe usbcore >/dev/null 2>&1 && mount -n -t usbfs /proc/bus/usb /proc/bus/usb
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# mount -n -t usbfs /proc/bus/usb /proc/bus/usb
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# if [ -r "/selinux/enforce" ] ; then
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# SELINUX_STATE=$(cat "/selinux/enforce")
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# else
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# # assume enforcing if you can't read it
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# SELINUX_STATE=1
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# fi
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……
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# chmod 0664 /var/run/utmpx /var/log/wtmpx
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# /tmp/kde-* /tmp/ksocket-* /tmp/mc-* /tmp/mcop-* /tmp/orbit-* \
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# /tmp/scrollkeeper-* /tmp/ssh-* \
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# /dev/.in_sysinit
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# curswap=$(awk '/^\/dev/ { print $1 }' /proc/swaps | while read x; do get_numeric_dev dec $x ; echo -n " "; done)
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# swappartitions=$(blkid -t TYPE=swap -o device)
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# if [ x"$swappartitions" != x ]; then
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# for partition in $swappartitions ; do
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# [ ! -e $partition ] && continue
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# majmin=$(get_numeric_dev dec $partition)
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# echo $curswap | grep -qw "$majmin" || action $"Enabling local swap partitions: " swapon $partition
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# done
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# fi
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# if strstr "$cmdline" netprofile= ; then
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# for arg in $cmdline ; do
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# if [ "${arg##netprofile=}" != "${arg}" ]; then
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# /usr/sbin/system-config-network-cmd –profile ${arg##netprofile=}
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# fi
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# done
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# fi
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# touch /var/run/confirm
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# /bin/plymouth –sysinit
2、复制/boot/grub/grub.conf至/tmp目录,删除/tmp/grub.conf文件中的行首的空白字符
[root@server01 tmp]# cp /boot/grub/grub.conf /tmp/
[root@server01 tmp]# sed -n "s@^[[:space:]]\+@@p" grub.conf
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root (hd0,0)
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kernel /vmlinuz-2.6.32-573.el6.x86_64 ro root=/dev/mapper/vg_server01-lv_root rd_NO_LUKS rd_LVM_LV=vg_server01/lv_root.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_NO_DM KEYBOARDTYPE=pc KEYTABLE=us rd_LVM_LV=vg_server01/lv_swap rhgb quiet
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initrd /initramfs-2.6.32-573.el6.x86_64.img
3、删除/tmp/rc.sysinit文件中以#开头,且后面跟了至少一个空白字符的行的#和空白字符
[root@server01 tmp]# sed -rn "s@^#[[:space:]]+@@p" rc.sysinit
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/etc/rc.d/rc.sysinit – run once at boot time
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Taken in part from Miquel van Smoorenburg's bcheckrc.
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Check SELinux status
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Print a text banner.
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Only read this once.
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Initialize hardware
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Set default affinity
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Load other user-defined modules
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Load modules (for backward compatibility with VARs)
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Configure kernel parameters
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Set the hostname.
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Sync waiting for storage.
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Device mapper & related initialization
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Start any MD RAID arrays that haven't been started yet
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Remount the root filesystem read-write.
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Clean up SELinux labels
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If relabeling, relabel mount points.
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Mount all other filesystems (except for NFS and /proc, which is already
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mounted). Contrary to standard usage,
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filesystems are NOT unmounted in single user mode.
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The 'no' applies to all listed filesystem types. See mount(8).
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Update quotas if necessary
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Check to see if a full relabel is needed
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Initialize pseudo-random number generator
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Configure machine if necessary.
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Clean out /.
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Do we need (w|u)tmpx files? We don't set them up, but the sysadmin might…
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Clean up /var.
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Clean up utmp/wtmp
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Clean up various /tmp bits
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Make ICE directory
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Start up swapping.
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Set up binfmt_misc
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Boot time profiles. Yes, this should be somewhere else.
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Now that we have all of our basic modules loaded and the kernel going,
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let's dump the syslog ring somewhere so we can find it later
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create the crash indicator flag to warn on crashes, offer fsck with timeout
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Let rhgb know that we're leaving rc.sysinit
4、为/tmp/grub.conf文件中的前三行的行首加#号
[root@server01 tmp]# sed -n "1,3s@^@#@p" grub.conf
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## grub.conf generated by anaconda
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##
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## Note that you do not have to rerun grub after making changes to this file
5、将/etc/yum.repos.d/CentOS-Media.repo文件中所有的enabled=0或gpgcheck=0修改最后的0为1
[root@server01 tmp]# sed -rn "s@(enabled|gpgcheck)=0@\1=1@p" /etc/yum.repos.d/CentOS-Media.repo
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enabled=1
6、每4小时执行一次对/etc目录的备份,备份至/backuup目录中,保存的目录名称为形如etc-201504020202
[root@server01 tmp]# crontab -e
* */4 * * * /bin/tar cvf /backup/etc-$(date +%Y%m%d%H%M%S) /etc/*
7、每周2,4,6备份/var/log/messages文件至/backup/message_logs目录中,保存的文件名形如messages-20160402
[root@server01 tmp]# crontab -e
* * * * 2,4,6 /bin/cp /var/log/messages /backup/message_logs/messages-$(date +%Y%m%d)
8、每天每两小时取当前系统/proc/meminfo文件中的所有以S开头的信息至/stats/memory.txt文件中
[root@server01 message_logs]# mkdir /stats
[root@server01 ~]# crontab -e
* */2 * * * /bin/cat /proc/meminfo | /bin/grep -E "^[S]" &> /stats/memory.txt
9、工作日的工作时间内,每两小时执行一次echo "howdy"
[root@server01 ~]# crontab -e
* 9-18/2 * * 1,2,3,4,5 /bin/echo "howdy"
原创文章,作者:Tornado,如若转载,请注明出处:http://www.178linux.com/55335