Question : Grep command

Hello,

Iam trying to write a small Bash script with look for the "eth" and subsequently, it should look for the string "UP" as shown in the below output. If it found the match, the script should continue to next stage or else it should display the error message saying "ethX interface is down" (where 'X' is the interface number). Please help me, this is urgent for me. Thanks in advance.

eth4 Link encap:Ethernet HWaddr 00:15:17:9C:11:A5
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:432872853 errors:0 dropped:0 overruns:0 frame:0
TX packets:313656456 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:587346118664 (547.0 GiB) TX bytes:149503575836 (139.2 GiB)
Interrupt:82 Memory:f2000000-f2012100

eth5 Link encap:Ethernet HWaddr 00:21:5E:36:21:96
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::221:5eff:fe36:2196/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:141480 errors:0 dropped:0 overruns:0 frame:0
TX packets:142977 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:36258160 (34.5 MiB) TX bytes:37118470 (35.3 MiB)
Interrupt:209 Memory:f4000000-f4012100

Thanks,
AR

Answer : Grep command

                       
             #!/bin/sh
 
INTERFACES=`ifconfig -a | awk '/^eth/ {print $1}'`
 
for int in ${INTERFACES}; do
        ifconfig ${int} | grep -q UP || echo ${int} interface is down.
done

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Question : Grep command

Answer : Grep command

1: 2: 3: 4: 5: 6: 7: #!/bin/sh INTERFACES=`ifconfig -a | awk '/^eth/ {print $1}'` for int in ${INTERFACES}; do ifconfig ${int} | grep -q UP || echo ${int} interface is down. done Open in New Window Select All

1: 2: 3: 4: 5: 6: 7:

#!/bin/sh INTERFACES=`ifconfig -a | awk '/^eth/ {print $1}'` for int in ${INTERFACES}; do ifconfig ${int} | grep -q UP || echo ${int} interface is down. done

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