CentOS7怎么用awk获取Mac地址并赋值给量

xf_flutter

求教：在CentOS7下获取Mac地址的值，我只能在知道网卡名称的情况下用下面的命令实现
[root@localhost ~]#  ifconfig eno16777984 | grep ether |awk '{print $2}'
00:0c:29:ba:59:97
而当记录为多条时，要怎么将awk所取到的值分别赋值给不同的shell变量呢？？
[root@localhost ~]# ip add | grep ether |awk '{print $2}'
00:0c:29:ba:59:94
00:0c:29:ba:59:9e
比如怎么将上面的两个Mac地址值赋值给变量A和B呢？
谢谢解答！

moperyblue

more file

1. 00:0c:29:ba:59:94
   
2. 00:0c:29:ba:59:9e

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1. eval $(awk 'BEGIN{l=split("A B",a)}{while(i++<l){print a[i]"="$0;break}}' file)

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1. echo $A $B

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xf_flutter

回复 2# moperyblue

谢谢，之前老调不出来，awk还需要熟悉。

改成这样 一行实现了
eval $(ip add | grep ether |awk 'BEGIN{l=split("A B",a)}{while(i++<l){print a"="$2;break}}')  

xf_flutter

回复 2# moperyblue

再次请教：
为什么我想获取网卡名称，用下面的命令可以得到这样的结果
[root@localhost ~]# eval $(ip add |grep BROADCAST |awk 'BEGIN{l=split("NET1 NET2",a)}{while(i++<l){print a"="$2;break}}')        
[root@localhost ~]# echo $NET2
eno33557248:

但如果我想去掉“eno33557248:”中的冒号，用下面命令却报错呢？？要怎么去掉冒号？
[root@localhost ~]# eval $(ip add |grep BROADCAST |awk -F ': ' 'BEGIN{l=split("NET1 NET2",a)}{while(i++<l){print a"="$2;break}}')
-bash: NET1: ?????

xf_flutter

补充：ip add内容如下：

[root@localhost ~]# ip add
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
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno16777984: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:0c:29:ba:79:94 brd ff:ff:ff:ff:ff:ff
    inet 192.16.116.166/24 brd 172.16.116.255 scope global eno16777984
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:feba:5994/64 scope link
       valid_lft forever preferred_lft forever
3: eno33557248: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:0c:29:ba:79:9e brd ff:ff:ff:ff:ff:ff

o枫叶o飘零

1. ip add|awk -F'[ :]+' '/BROADCAST/{print $2}'

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这样？

moperyblue

回复 5# xf_flutter

1. eval $(ip add|awk 'BEGIN{l=split("NET1 NET2",a)}/BROADCAST/{while(i++<l){print a[i]"="$2;break}}' FS=': ')

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zy86416779

自动识别有几个网卡，然后对其进行赋值。借鉴了moperyblue的想法，进行了一点改进。
1. 三个网卡

1. [root@CentOS_6 experiment]# character=$(echo {a..z});character=$(echo $character | sed 's/ //g');line=$(cat test.txt | egrep ": eno"|wc -l);real_character=$(echo ${character:0:${line}});cat test.txt | egrep ": eno"|awk -F":| " -v real_character="$real_character" 'BEGIN{l=split(real_character,array,"")}{if(NR==1){i=1};print array[i]"="$3;i++}'
   
2. a=eno16777984
   
3. b=eno33557248
   
4. c=eno45667248
   
5. [root@CentOS_6 experiment]# cat test.txt
   
6. 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
   
7.     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   
8.     inet 127.0.0.1/8 scope host lo
   
9.        valid_lft forever preferred_lft forever
   
10.     inet6 ::1/128 scope host
    
11.        valid_lft forever preferred_lft forever
    
12. 2: eno16777984: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    
13.     link/ether 00:0c:29:ba:79:94 brd ff:ff:ff:ff:ff:ff
    
14.     inet 192.16.116.166/24 brd 172.16.116.255 scope global eno16777984
    
15.        valid_lft forever preferred_lft forever
    
16.     inet6 fe80::20c:29ff:feba:5994/64 scope link
    
17.        valid_lft forever preferred_lft forever
    
18. 3: eno33557248: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    
19.     link/ether 00:0c:29:ba:79:9e brd ff:ff:ff:ff:ff:ff
    
20. 4: eno45667248: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    
21.     link/ether 00:0c:29:ba:79:9e brd ff:ff:ff:ff:ff:ff
    

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2. 两个网卡

1. [root@CentOS_6 experiment]# character=$(echo {a..z});character=$(echo $character | sed 's/ //g');line=$(cat test.txt | egrep ": eno"|wc -l);real_character=$(echo ${character:0:${line}});cat test.txt | egrep ": eno"|awk -F":| " -v real_character="$real_character" 'BEGIN{l=split(real_character,array,"")}{if(NR==1){i=1};print array[i]"="$3;i++}'
   
2. a=eno16777984
   
3. b=eno33557248
   
4. [root@CentOS_6 experiment]# cat test.txt
   
5. 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
   
6.     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   
7.     inet 127.0.0.1/8 scope host lo
   
8.        valid_lft forever preferred_lft forever
   
9.     inet6 ::1/128 scope host
   
10.        valid_lft forever preferred_lft forever
    
11. 2: eno16777984: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    
12.     link/ether 00:0c:29:ba:79:94 brd ff:ff:ff:ff:ff:ff
    
13.     inet 192.16.116.166/24 brd 172.16.116.255 scope global eno16777984
    
14.        valid_lft forever preferred_lft forever
    
15.     inet6 fe80::20c:29ff:feba:5994/64 scope link
    
16.        valid_lft forever preferred_lft forever
    
17. 3: eno33557248: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    
18.     link/ether 00:0c:29:ba:79:9e brd ff:ff:ff:ff:ff:ff

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3. 五个网卡

1. [root@CentOS_6 experiment]# character=$(echo {a..z});character=$(echo $character | sed 's/ //g');line=$(cat test.txt | egrep ": eno"|wc -l);real_character=$(echo ${character:0:${line}});cat test.txt | egrep ": eno"|awk -F":| " -v real_character="$real_character" 'BEGIN{l=split(real_character,array,"")}{if(NR==1){i=1};print array[i]"="$3;i++}'
   
2. a=eno16777984
   
3. b=eno33557248
   
4. c=eno45667248
   
5. d=eno16777976
   
6. e=eno16127984
   
7. [root@CentOS_6 experiment]# cat test.txt
   
8. 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
   
9.     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   
10.     inet 127.0.0.1/8 scope host lo
    
11.        valid_lft forever preferred_lft forever
    
12.     inet6 ::1/128 scope host
    
13.        valid_lft forever preferred_lft forever
    
14. 2: eno16777984: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    
15.     link/ether 00:0c:29:ba:79:94 brd ff:ff:ff:ff:ff:ff
    
16.     inet 192.16.116.166/24 brd 172.16.116.255 scope global eno16777984
    
17.        valid_lft forever preferred_lft forever
    
18.     inet6 fe80::20c:29ff:feba:5994/64 scope link
    
19.        valid_lft forever preferred_lft forever
    
20. 3: eno33557248: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    
21.     link/ether 00:0c:29:ba:79:9e brd ff:ff:ff:ff:ff:ff
    
22. 4: eno45667248: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    
23.     link/ether 00:0c:29:ba:79:9e brd ff:ff:ff:ff:ff:ff

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5: eno16777976: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:0c:29:ba:79:94 brd ff:ff:ff:ff:ff:ff
    inet 192.16.116.166/24 brd 172.16.116.255 scope global eno16777984
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:feba:5994/64 scope link
       valid_lft forever preferred_lft forever
6: eno16127984: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:0c:29:ba:79:94 brd ff:ff:ff:ff:ff:ff
    inet 192.16.116.166/24 brd 172.16.116.255 scope global eno16777984
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:feba:5994/64 scope link
       valid_lft forever preferred_lft forever
[/code]

xf_flutter

回复 6# o枫叶o飘零

可以的，谢谢！

xf_flutter

回复 7# moperyblue

谢谢