当我尝试发送ifconfig命令即时得到本
ath0 IEEE 802.11ng ESSID:"test" Nickname:""
Mode:Master Frequency:2.412 GHz Access Point: 00:00:00:00:00:00
Bit Rate:0 kb/s Tx-Power=-4 dBm Sensitivity=16/16
Retry:off RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=0/94 Signal level=-96 dBm Noise level=-96 dBm
Rx invalid nwid:475654423 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
如何从例如线的这部分仅获得
ESSID:""test
Frequency:2.412 GHz
答案 0 :(得分:0)
给出您的实际粘贴(而不考虑格式错误的示例输出):
$ cat ifconf
ath0 IEEE 802.11ng ESSID:"test" Nickname:""
Mode:Master Frequency:2.412 GHz Access Point: 00:00:00:00:00:00
Bit Rate:0 kb/s Tx-Power=-4 dBm Sensitivity=16/16
Retry:off RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=0/94 Signal level=-96 dBm Noise level=-96 dBm
Rx invalid nwid:475654423 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
$ grep -oE 'ESSID:"[^"]+"|Frequency:[^ ]+' ifconf
ESSID:"test"
Frequency:2.412
它实际上只是扩展的RegEx,而grep的-o
标志仅输出完全匹配项,而不是匹配行。