grep满足多条件怎么提取行？

yankai0403

Timecounters tick every 1.000 msec
hptrr: no controller detected.
Waiting 5 seconds for SCSI devices to settle
ad0: 8192MB <VMware Virtual IDE Hard Drive 00000001> at ata0-master UDMA33
acd0: CDROM <VMware Virtual IDE CDROM Drive/00000001> at ata1-master UDMA33
da0 at mpt0 bus 0 target 0 lun 0
da0: <VMware, VMware Virtual S 1.0> Fixed Direct Access SCSI-2 device
da0: 80.000MB/s transfers (40.000MHz, offset 127, 16bit), Tagged Queueing Enabled
da0: 4096MB (8388608 512 byte sectors: 255H 63S/T 522C)
Trying to mount root from

假设我要提ad和da 开头的行，用grep怎么提取？

HH106

egrep ^ad\|^da urfile

biglazybug

grep -E "^da|^ad" < urfile

[ 本帖最后由 biglazybug 于 2008-12-22 21:47 编辑 ]

welcome008

grep -E '^(ad|da)' filename
egrep '^(ad|da)' filename

我是DBA

大家晚上都还在啊，哈

yankai0403

谢谢高手