NC basic usage 4

[[email protected] nc]# mkdir /mnt/testboot
[[email protected] nc]# mount -o loop /tmp/nc/h102.boot.backup  /mnt/testboot/
[[email protected] nc]# cd /mnt/testboot/
[[email protected] testboot]# ls
config-2.6.32-504.el6.x86_64  initramfs-2.6.32-504.el6.x86_64.img    symvers-2.6.32-504.el6.x86_64.gz
efi                           initrd-2.6.32-504.el6.x86_64kdump.img  System.map-2.6.32-504.el6.x86_64
grub                          lost+found                             vmlinuz-2.6.32-504.el6.x86_64
[[email protected] testboot]# cd grub/
[[email protected] grub]# ls
device.map     fat_stage1_5  grub.conf         jfs_stage1_5  minix_stage1_5     splash.xpm.gz  stage2         vstafs_stage1_5
e2fs_stage1_5  ffs_stage1_5  iso9660_stage1_5  menu.lst      reiserfs_stage1_5  stage1         ufs2_stage1_5  xfs_stage1_5
[[email protected] grub]# cat grub.conf 
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/mapper/vg_temp-lv_root
#          initrd /initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS 6 (2.6.32-504.el6.x86_64)
	root (hd0,0)
	kernel /vmlinuz-2.6.32-504.el6.x86_64 ro root=/dev/mapper/vg_temp-lv_root rd_LVM_LV=vg_temp/lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_temp/lv_swap rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
	initrd /initramfs-2.6.32-504.el6.x86_64.img
[[email protected] grub]# 
[[email protected] grub]# df -h 
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_temp-lv_root
                       50G  7.9G   39G  17% /
tmpfs                 1.9G     0  1.9G   0% /dev/shm
/dev/sda1             477M   34M  419M   8% /boot
/dev/mapper/vg_temp-lv_home
                      5.4G   12M  5.1G   1% /home
/tmp/nc/h102.boot.backup
                      477M   34M  419M   8% /mnt/testboot
[[email protected] grub]# 

Remote control

[[email protected] nc]# mkfifo /tmp/cmd_fifo
[[email protected] nc]# ll /tmp/cmd_fifo 
prw-r--r-- 1 root root 0 Nov 17 22:29 /tmp/cmd_fifo
[[email protected] nc]# cat /tmp/cmd_fifo | /bin/bash -i 2>&1 | nc -l 6789 > /tmp/cmd_fifo 
----------
[[email protected] grub]# nc h102 6789
[[email protected] nc]# 

[[email protected] nc]# ls
ls
abc
file.txt
tmp
xx
[[email protected] nc]# ls -l 
ls -l 
total 44
-rw-r--r-- 1 root root   662 Nov 17 19:35 abc
-rw-r--r-- 1 root root    10 Nov 17 21:53 file.txt
drwxr-xr-x 3 root root  4096 Nov 17 19:40 tmp
-rw-r--r-- 1 root root 30720 Nov 17 19:40 xx
[[email protected] nc]# echo "NB"        
echo "NB"
NB
[[email protected] nc]# hostname 
hostname
h102.temp
[[email protected] nc]# ip a 
ip a 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:b6:a8:f8 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.80/24 brd 192.168.2.255 scope global eth3
    inet6 fe80::20c:29ff:feb6:a8f8/64 scope link 
       valid_lft forever preferred_lft forever
3: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:b6:a8:02 brd ff:ff:ff:ff:ff:ff
    inet 192.168.100.102/24 brd 192.168.100.255 scope global eth2
    inet6 fe80::20c:29ff:feb6:a802/64 scope link 
       valid_lft forever preferred_lft forever
[[email protected] nc]#