while循环语句失败告终

admin

#!/bin/bash
& E/ z; c6 I8 o3 Q####
: o1 e0 t9 S# H! H; C0 y1 P6 }+ WETH=`ip addr |grep eth |grep "state UP" |grep -v eth0 |awk -F ":" '{print $2}'|xargs`
7 |- u0 g# ?4 _" M' twhile [ "$ETH " != "eth0" ]
0 y! J5 m& x! u4 F( B7 zdo
' [! R8 b% w4 _# F+ Q/ l* X9 G& T( C  if [ "$ETH" == "eth1" ];then
     cat >/etc/sysctl.conf <<EOF
    # sysctl settings are defined through files in
7 S1 G3 p. X* Q$ l4 B1 a/ s! `2 ]# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
#
# Vendors settings live in /usr/lib/sysctl.d/.
7 B- S: Q9 z" \( ]# K, }# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
( I8 D. [+ m+ O3 i. v' P, @# only specific settings, add a file with a lexically later
& @+ T/ a4 @& {" b' P4 `# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).
+ W9 k6 }( g$ a" A. m. a8 Dnet.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.eth0.rp_filter = 0
9 c0 J( K# S5 O. H& h; @: fnet.ipv4.conf.$ETH.rp_filter = 0
$ h6 t3 V2 V# Q. {+ H5 f) [: wEOF
  else
   cat >/etc/sysctl.conf <<EOF
9 a$ C& A% r8 b7 D& g) f; p! z    # sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
( a, ?0 T/ E* \$ Y#
# Vendors settings live in /usr/lib/sysctl.d/.
# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
5 d% d7 F$ D! F# only specific settings, add a file with a lexically later
- u$ C' }. e1 Z2 t# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).
+ P' |3 T: G. h" c1 }net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.eth0.rp_filter = 0
EOF
$ \  s3 _) T2 z1 j6 p% C! d  nfi
9 ?9 Q" B3 T4 P" S% u3 l8 ^###kernel on
sysctl -p
sleep 300
done
exit 0