linux下查找端口號(hào)對(duì)應(yīng)的服務(wù)名
linux下查找端口號(hào)對(duì)應(yīng)的服務(wù)名
linux命令在系統(tǒng)中有兩種類型：內(nèi)置Shell命令和Linux命令。那么你知道linux下查找端口號(hào)對(duì)應(yīng)的服務(wù)名么?接下來(lái)是小編為大家收集的linux下查找端口號(hào)對(duì)應(yīng)的服務(wù)名，歡迎大家閱讀：
linux下查找端口號(hào)對(duì)應(yīng)的服務(wù)名
1)grep -w 端口號(hào) /etc/services
2)grep "\b端口號(hào)\b" /etc/services
以2049端口為例，執(zhí)行g(shù)rep -w 2049 /etc/services或grep "\b2049\b" /etc/services 即可查找到其對(duì)應(yīng)的服務(wù)名為nfs
grep -w 2049 /etc/services
nfs 2049/tcp nfsd shilp # Network File System
nfs 2049/udp nfsd shilp # Network File System
nfs 2049/sctp nfsd shilp # Network File System
# grep "\b2049\b" /etc/services
nfs 2049/tcp nfsd shilp # Network File System
nfs 2049/udp nfsd shilp # Network File System
nfs 2049/sctp nfsd shilp # Network File System
其中-w表示只顯示全字符合的列，即精確匹配;"\b"表示匹配一個(gè)字邊界，即字與空格間的位置。例如，“er\b”匹配“never”中的“er”，但不匹配“verb”中的“er”(若匹配“verb”中的“er”可使用"\B"進(jìn)行非字邊界匹配)。
根據(jù)服務(wù)名查找對(duì)應(yīng)的端口號(hào)
1)grep -w 服務(wù)名 /etc/services
2)grep "\b服務(wù)名\b" /etc/services
以nfs服務(wù)為例，執(zhí)行g(shù)rep -w nfs /etc/services 或grep "\bnfs\b"/etc/services即可查找到其對(duì)應(yīng)的端口號(hào)為2049
# grep -w nfs /etc/services
nfs 2049/tcp nfsd shilp # Network File System
nfs 2049/udp nfsd shilp # Network File System
nfs 2049/sctp nfsd shilp # Network File System
# grep "\bnfs\b" /etc/services
nfs 2049/tcp nfsd shilp # Network File System
nfs 2049/udp nfsd shilp # Network File System
nfs 2049/sctp nfsd shilp # Network File System
其中-w表示只顯示全字符合的列，即精確匹配;"\b"表示匹配一個(gè)字邊界，即字與空格間的位置。\bnfs\b即為精確匹配nfs。
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