while循环语句失败告终

admin

#!/bin/bash
####
ETH=`ip addr |grep eth |grep "state UP" |grep -v eth0 |awk -F ":" '{print $2}'|xargs`
while [ "$ETH " != "eth0" ]
# `  o! s' s! Fdo
" a3 ^% T1 r. N! {$ O- r  if [ "$ETH" == "eth1" ];then
$ Z1 p5 m+ {# b8 v4 y/ [+ E& I/ ~" h     cat >/etc/sysctl.conf <<EOF
    # sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
#
# Vendors settings live in /usr/lib/sysctl.d/.
3 u+ _: B: J5 ]5 ^* t, h) x% s# To override a whole file, create a new file with the same in
, a# [1 c9 e; p1 r" Q) r: ~' Y# /etc/sysctl.d/ and put new settings there. To override
- B# ]0 y5 J+ b# only specific settings, add a file with a lexically later
# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.eth0.rp_filter = 0
3 \3 A2 f; C: W# z% jnet.ipv4.conf.$ETH.rp_filter = 0
- g: n! T3 C2 C1 x0 a: k# AEOF
2 u' u7 X1 I; e% \  else
7 C" p  p- r% H7 \0 U9 I" i( a) y+ R   cat >/etc/sysctl.conf <<EOF
, [( ]. b3 N) i& j/ b* h& L    # sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
1 J1 [" k1 M& O' m, q#
  h8 x9 ]7 x& T; u# Vendors settings live in /usr/lib/sysctl.d/.
* U$ T! k* a. S# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
# only specific settings, add a file with a lexically later
9 i1 v% k: t! I# name in /etc/sysctl.d/ and put new settings there.
#
* _5 e$ b6 u4 r) A. g7 k- N8 `# For more information, see sysctl.conf(5) and sysctl.d(5).
net.ipv4.conf.all.rp_filter = 0
4 V2 t1 l* `, @4 wnet.ipv4.conf.eth0.rp_filter = 0
, n9 z8 H& q- Y. N, ]. bEOF
5 _  A. L- o3 N% @; N( ]# n4 xfi
###kernel on
. z  y  A) o' }0 Msysctl -p
$ _6 [0 Z2 B8 @6 Usleep 300
* w5 P3 m) p6 l# ~) Bdone
exit 0