13.1 grep<\/p>\n\n\n\n
REGEXP\uff1aREGular EXPression(\u6b63\u5219\u8868\u8fbe\u5f0f)<\/p>\n\n\n\n
Pattern: \uff08\u6a21\u5f0f\uff09<\/p>\n\n\n\n
1\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n
Basic REGEXP\uff1a\u57fa\u672c<\/p>\n\n\n\n
Extended REGEXP\uff1a\u6269\u5c55<\/p>\n\n\n\n
2\u3001\u57fa\u672c\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n
.: \u4efb\u610f\u8bcd<\/p>\n\n\n\n
[]: \u62ec\u53f7\u4e2d\u95f4\u7684\u4efb\u610f\u5355\u4e2a\u5b57\u7b26<\/p>\n\n\n\n
[^]:\u53cd\u5411\u9009\u53d6<\/p>\n\n\n\n
3\u3001\u6b21\u6570\u5339\u914d\uff1a<\/p>\n\n\n\n
*: \u5176\u524d\u7684\u5b57\u7b26\u5339\u914d\u4efb\u610f\u6b21<\/p>\n\n\n\n
\\?: 0\u62161\u6b21<\/p>\n\n\n\n
\\{m,n\\}\uff1a\u81f3\u5c11m\u6b21\uff0c\u81f3\u591an\u6b21\uff1b<\/p>\n\n\n\n
.*: \u4efb\u610f\u957f\u5ea6\u7684\u4efb\u610f\u5b57\u7b26<\/p>\n\n\n\n
4\u3001\u951a\u5b9a\uff1a<\/p>\n\n\n\n
^:\u884c\u9996<\/p>\n\n\n\n
$:\u884c\u5c3e<\/p>\n\n\n\n
\\<, \\b:\u5355\u8bcd\u9996<\/p>\n\n\n\n
\\>, \\b:\u5355\u8bcd\u5c3e<\/p>\n\n\n\n
\\(\\)\uff1a\u7528\u4e8e\u5b9e\u73b0\u5206\u7ec4\u5f15\u7528<\/p>\n\n\n\n
\\1, \\2, \\3, …\uff08\u5f15\u7528\u524d\u9762\u7b2cn\u4e2a\u5c0f\u62ec\u53f7\u91cc\u9762\u7684\u5185\u5bb9\uff09<\/p>\n\n\n\n
grep\uff1a\u4f7f\u7528\u57fa\u672c\u6b63\u5219\u8868\u8fbe\u5f0f\u5b9a\u4e49\u7684\u6a21\u5f0f\u6765\u8fc7\u6ee4\u6587\u672c\u7684\u547d\u4ee4\uff08\u9ed8\u8ba4\u53ea\u652f\u6301\u57fa\u672c\u6b63\u5219\u8868\u8fbe\u5f0f\uff09\uff1b<\/p>\n\n\n\n
-i\uff1a\u5ffd\u7565\u5927\u5c0f\u5199<\/p>\n\n\n\n
-v\uff1a\u53cd\u5411\u641c\u7d22<\/p>\n\n\n\n
-o\uff1a\u53ea\u663e\u793a\u5339\u914d\u5230\u7684\u5b57\u7b26\u4e32<\/p>\n\n\n\n
–color\uff1a\u663e\u793a\u989c\u8272<\/p>\n\n\n\n
-E: \u4f7f\u7528\u6269\u5c55\u6b63\u5219\u8868\u8fbe\u5f0f<\/p>\n\n\n\n
-A #: \u663e\u793a\u5339\u914d\u5230\u7684\u67d0\u4e00\u884c\u540e\u9762\u7684\u7b2cn\u884c<\/p>\n\n\n\n
-B #: \u663e\u793a\u5339\u914d\u5230\u7684\u67d0\u4e00\u884c\u524d\u9762\u7684\u7b2cn\u884c<\/p>\n\n\n\n
-C #:\u663e\u793a\u5339\u914d\u5230\u7684\u67d0\u4e00\u884c\u524d\u540e\u9762\u5404n\u884c<\/p>\n\n\n\n
[root@Daniel-R480 ~]# grep -A 2 ‘^core id’ \/proc\/cpuinfo<\/p>\n\n\n\n
core id : 0<\/p>\n\n\n\n
cpu cores : 4<\/p>\n\n\n\n
apicid : 0<\/p>\n\n\n\n
[root@Daniel-R480 ~]# grep -B 2 ‘^core id’ \/proc\/cpuinfo<\/p>\n\n\n\n
physical id : 0<\/p>\n\n\n\n
siblings : 8<\/p>\n\n\n\n
core id : 0<\/p>\n\n\n\n
[root@Daniel-R480 ~]# grep -C 2 ‘^core id’ \/proc\/cpuinfo<\/p>\n\n\n\n
physical id : 0<\/p>\n\n\n\n
siblings : 8<\/p>\n\n\n\n
core id : 0<\/p>\n\n\n\n
cpu cores : 4<\/p>\n\n\n\n
apicid : 0<\/p>\n\n\n\n
—<\/p>\n\n\n\n
13.2 \u6269\u5c55\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n
\u5b57\u7b26\u524d\u9762\u9ed8\u8ba4\u4e0d\u52a0\\<\/p>\n\n\n\n
1\u3001\u5b57\u7b26\u5339\u914d\uff1a<\/p>\n\n\n\n
.<\/p>\n\n\n\n
[]<\/p>\n\n\n\n
[^]<\/p>\n\n\n\n
2\u3001\u6b21\u6570\u5339\u914d\uff1a<\/p>\n\n\n\n
*: <\/p>\n\n\n\n
?:<\/p>\n\n\n\n
+: \u5339\u914d\u5176\u524d\u9762\u7684\u5b57\u7b26\u81f3\u5c111\u6b21<\/p>\n\n\n\n
{m,n}<\/p>\n\n\n\n
3\u3001\u4f4d\u7f6e\u951a\u5b9a\uff1a<\/p>\n\n\n\n
^<\/p>\n\n\n\n
$<\/p>\n\n\n\n
\\<<\/p>\n\n\n\n
\\><\/p>\n\n\n\n
4\u3001\u5206\u7ec4\uff1a<\/p>\n\n\n\n
()\uff1a\u5206\u7ec4<\/p>\n\n\n\n
\\1, \\2, \\3, …<\/p>\n\n\n\n
5\u3001\u6216\u8005<\/p>\n\n\n\n
|: or<\/p>\n\n\n\n
C|cat: C\u6216cat(\u5339\u914d\u7684\u662fC\u6216\u8005cat\uff0c\u5339\u914d\u5de6\u8fb9\u6216\u8005\u53f3\u8fb9\u7684\u5185\u5bb9)<\/p>\n\n\n\n
\uff08C|c\uff09at\uff1aCat\u6216\u8005cat<\/p>\n\n\n\n
[root@Daniel-R480 ~]# grep -E –color ‘C|cat’ test3.txt<\/p>\n\n\n\n
cat<\/p>\n\n\n\n
Cat<\/p>\n\n\n\n
C<\/p>\n\n\n\n
[root@Daniel-R480 ~]# grep -E ‘C|cat’ test3.txt<\/p>\n\n\n\n
cat<\/p>\n\n\n\n
Cat<\/p>\n\n\n\n
C<\/p>\n\n\n\n
[root@Daniel-R480 ~]# grep -E ‘(C|c)at’ test3.txt<\/p>\n\n\n\n
cat<\/p>\n\n\n\n
Cat<\/p>\n\n\n\n
[root@Daniel-R480 ~]# cat .\/test3.txt<\/p>\n\n\n\n
cat<\/p>\n\n\n\n
Cat<\/p>\n\n\n\n
C<\/p>\n\n\n\n
c<\/p>\n\n\n\n
[root@Daniel-R480 ~]#<\/p>\n\n\n\n
grep -E = egrep <\/p>\n\n\n\n
\u7ec3\u4e60<\/p>\n\n\n\n
1\u3001\u663e\u793a\u6240\u6709\u4ee5\u6570\u5b57\u7ed3\u5c3e\u4e14\u6587\u4ef6\u540d\u4e2d\u4e0d\u5305\u542b\u7a7a\u767d\u7684\u6587\u4ef6\uff1b<\/p>\n\n\n\n
ls *[^[:space:]]*[0-9] ?????????<\/p>\n\n\n\n
\\.\u8ba9\u5143\u5b57\u7b26\u8868\u793a\u5b83\u672c\u8eab\u7684\u610f\u4e49<\/p>\n\n\n\n
\u627e\u51fa\/boot\/grub\/grub.conf\u6587\u4ef6\u4e2d1-255\u4e4b\u95f4\u7684\u6570\u5b57\uff1b<\/p>\n\n\n\n
[root@Daniel-R480 ~]# egrep ‘\\<([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\>’ \/boot\/grub\/grub.conf<\/p>\n\n\n\n
title CentOS Linux 7 (3.10.0-957.1.3.el7.x86_64)<\/p>\n\n\n\n
kernel \/boot\/vmlinuz-3.10.0-957.1.3.el7.x86_64 ro root=UUID=f41e390f-835b-4223-a9bb-9b45984ddf8d console=hvc0 LANG=en_US.UTF-8<\/p>\n\n\n\n
initrd \/boot\/initramfs-3.10.0-957.1.3.el7.x86_64.img<\/p>\n\n\n\n
[root@Daniel-R480 ~]# ifconfig | egrep ‘\\<([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\>\\.\\<([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\>\\.\\<([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\>\\.\\<([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\>’<\/p>\n\n\n\n
inet 192.168.18.116 netmask 255.255.255.0 broadcast 192.168.18.255<\/p>\n\n\n\n
inet www.danios.com netmask 255.0.0.0<\/p>\n\n\n\n
[root@Daniel-R480 ~]# ifconfig | egrep –color ‘(\\<([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\>\\.){3}\\<([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\>’<\/p>\n\n\n\n
inet 192.168.18.116 netmask 255.255.255.0 broadcast 192.168.18.255<\/p>\n\n\n\n
inet www.danios.com netmask 255.0.0.0<\/p>\n\n\n\n
[root@Daniel-R480 ~]# ifconfig | egrep ‘\\<([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\>’<\/p>\n\n\n\n
inet 192.168.18.116 netmask 255.255.255.0 broadcast 192.168.18.255<\/p>\n\n\n\n
ether e8:6a:64:86:12:9f (Ethernet)<\/p>\n\n\n\n
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 1500<\/p>\n\n\n\n
inet www.danios.com netmask 255.0.0.0<\/p>\n\n\n\n
inet6 ::1 prefixlen 128 scopeid 0xfe<compat,link,site,host><\/p>\n\n\n\n
[root@Daniel-R480 ~]# ifconfig | egrep –color -o ‘(\\<([0-9]|[1-9][0-9]|1[0-9][0-9]|2<\/p>\n\n\n\n
[0-4][0-9]|25[0-5])\\>\\.){3}\\<([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\>’<\/p>\n\n\n\n
192.168.18.116<\/p>\n\n\n\n
255.255.255.0<\/p>\n\n\n\n
192.168.18.255<\/p>\n\n\n\n
www.danios.com<\/p>\n\n\n\n
255.0.0.0<\/p>\n\n\n\n
2\u3001\u53ea\u8f93\u51faifconfig\u91cc\u9762\u7684ip\u5730\u5740<\/p>\n\n\n\n
IPv4: <\/p>\n\n\n\n
5\u7c7b\uff1aA B C D E<\/p>\n\n\n\n
A\uff1a1-127<\/p>\n\n\n\n
B\uff1a128-191<\/p>\n\n\n\n
C\uff1a192-223<\/p>\n\n\n\n
\u53ea\u663e\u793aip\u5730\u5740<\/p>\n\n\n\n
[root@Daniel-R480 ~]# ifconfig | egrep ‘\\<([1-9]|[1-9][0-9]|1[0-9]{2}|2[01][0-9]|22[0-3])\\>(\\.\\<([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-4])\\>){2}\\.\\<([1-9]|[1-9][0-9]<\/p>\n\n\n\n
|1[0-9][0-9]|2[0-4][0-9]|25[0-4])\\>’<\/p>\n\n\n\n
inet 192.168.18.116 netmask 255.255.255.0 broadcast 192.168.18.255<\/p>\n\n\n\n
inet www.danios.com netmask 255.0.0.0<\/p>\n\n\n\n
[root@Daniel-R480 ~]# ifconfig | egrep -o ‘\\<([1-9]|[1-9][0-9]|1[0-9]{2}|2[01][0-9]|22[0-3])\\>(\\.\\<([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-4])\\>){2}\\.\\<([1-9]|[1-9][0<\/p>\n\n\n\n
-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-4])\\>’<\/p>\n\n\n\n
192.168.18.116<\/p>\n\n\n\n
www.danios.com<\/p>\n\n\n\n
[root@Daniel-R480 ~]#<\/p>\n","protected":false},"excerpt":{"rendered":"
13.1 grep REGEXP\uff1aREGular&n […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-487","post","type-post","status-publish","format-standard","hentry","category-linux"],"aioseo_notices":[],"views":93,"_links":{"self":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts\/487","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=487"}],"version-history":[{"count":1,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts\/487\/revisions"}],"predecessor-version":[{"id":488,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts\/487\/revisions\/488"}],"wp:attachment":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}