Linux網絡監控工具nethogs Linux網絡監控工具nethogs

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linux（40） 

版權聲明：本文為部落客原創文章，未經部落客允許不得轉載。

Nethogs 是一個終端下的網絡流量監控工具，它的特别之處在于可以顯示每個程序的帶寬占用情況，這樣可以更直覺擷取網絡使用情況。它支援 IPv4 和 IPv6 協定、支援本地網卡及 PPP 連結。

有些時候伺服器莫名其妙的向外發送大量的包，占用大量帶寬，導緻其他伺服器受到影響。那麼在流量異常的情況下，如何檢視每個程序使用的帶寬呢？可以使用nethogs工具來檢視。

1、下載下傳 

下載下傳安裝包：nethogs-0.8.0.tar.gz (38.0 kB)

2、安裝

yum install ncurses*  tar -zxvf nethogs-0.8.0.tar.gz  cd nethogs  make && make install

如果報錯如下：

[root@localhost nethogs]# make && make install  g++ -g -Wall -Wextra -c packet.cpp  g++ -g -Wall -Wextra -c connection.cpp  g++ -g -Wall -Wextra -c process.cpp  g++ -g -Wall -Wextra -c refresh.cpp  refresh.cpp:9: warning: unused parameter ‘i’  cc -g -Wall -Wextra -c decpcap.c  decpcap.c:7:18: error: pcap.h: No such file or directory  In file included from decpcap.c:8:  decpcap.h:34: error: expected specifier-qualifier-list before ‘pcap_t’  decpcap.c:14: error: expected ‘)’ before ‘*’ token  decpcap.c: In function ‘dp_open_offline’:  decpcap.c:48: error: ‘pcap_t’ undeclared (first use in this function)  decpcap.c:48: error: (Each undeclared identifier is reported only once  decpcap.c:48: error: for each function it appears in.)  decpcap.c:48: error: ‘temp’ undeclared (first use in this function)  decpcap.c:48: warning: implicit declaration of function ‘pcap_open_offline’  decpcap.c:55: warning: implicit declaration of function ‘dp_fillhandle’  decpcap.c: In function ‘dp_open_live’:  decpcap.c:60: error: ‘pcap_t’ undeclared (first use in this function)  decpcap.c:60: error: ‘temp’ undeclared (first use in this function)  decpcap.c:60: warning: implicit declaration of function ‘pcap_open_live’  decpcap.c: In function ‘dp_addcb’:  decpcap.c:74: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c: In function ‘dp_parse_tcp’:  decpcap.c:84: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:86: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:87: error: ‘struct dp_handle’ has no member named ‘userdata’  decpcap.c: In function ‘dp_parse_ip’:  decpcap.c:99: error: dereferencing pointer to incomplete type  decpcap.c:103: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:105: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:106: error: ‘struct dp_handle’ has no member named ‘userdata’  decpcap.c: In function ‘dp_parse_ip6’:  decpcap.c:126: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:128: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:129: error: ‘struct dp_handle’ has no member named ‘userdata’  decpcap.c: In function ‘dp_parse_ethernet’:  decpcap.c:150: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:152: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:153: error: ‘struct dp_handle’ has no member named ‘userdata’  decpcap.c: In function ‘dp_parse_ppp’:  decpcap.c:196: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:198: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:199: error: ‘struct dp_handle’ has no member named ‘userdata’  decpcap.c: In function ‘dp_parse_linux_cooked’:  decpcap.c:238: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:240: error: ‘struct dp_handle’ has no member named ‘callback’  decpcap.c:241: error: ‘struct dp_handle’ has no member named ‘userdata’  decpcap.c: In function ‘dp_pcap_callback’:  decpcap.c:270: error: ‘struct dp_handle’ has no member named ‘userdata_size’  decpcap.c:271: error: ‘struct dp_handle’ has no member named ‘userdata’  decpcap.c:271: error: ‘struct dp_handle’ has no member named ‘userdata_size’  decpcap.c:273: error: ‘struct dp_handle’ has no member named ‘linktype’  decpcap.c:274: error: ‘DLT_EN10MB’ undeclared (first use in this function)  decpcap.c:277: error: ‘DLT_PPP’ undeclared (first use in this function)  decpcap.c:280: error: ‘DLT_LINUX_SLL’ undeclared (first use in this function)  decpcap.c:283: error: ‘DLT_RAW’ undeclared (first use in this function)  decpcap.c:284: error: ‘DLT_NULL’ undeclared (first use in this function)  decpcap.c:289: error: ‘struct dp_handle’ has no member named ‘linktype’  decpcap.c: In function ‘dp_dispatch’:  decpcap.c:296: error: ‘struct dp_handle’ has no member named ‘userdata’  decpcap.c:297: error: ‘struct dp_handle’ has no member named ‘userdata_size’  decpcap.c:298: warning: implicit declaration of function ‘pcap_dispatch’  decpcap.c:298: error: ‘struct dp_handle’ has no member named ‘pcap_handle’  decpcap.c: In function ‘dp_setnonblock’:  decpcap.c:302: warning: implicit declaration of function ‘pcap_setnonblock’  decpcap.c:302: error: ‘struct dp_handle’ has no member named ‘pcap_handle’  decpcap.c: In function ‘dp_geterr’:  decpcap.c:307: warning: implicit declaration of function ‘pcap_geterr’  decpcap.c:307: error: ‘struct dp_handle’ has no member named ‘pcap_handle’  make: * [decpcap.o] Error 1

執行指令

yum install libpcap-dev* libncurses5-dev*

然後再重新編譯安裝，如下：

decpcap.c:60: warning: passing argument 5 of ‘pcap_open_live’ discards qualifiers from pointer  /usr/include/pcap/pcap.h:349: note: expected ‘char ’ but argument is of type ‘const char ’  g++ -g -Wall -Wextra -c cui.cpp -DVERSION=\”0\” -DSUBVERSION=\”8\” -DMINORVERSION=\”0\”  g++ -g -Wall -Wextra -c inode2prog.cpp  g++ -g -Wall -Wextra -c conninode.cpp  g++ -c -o devices.o devices.cpp  g++ -g -Wall -Wextra nethogs.cpp packet.o connection.o process.o refresh.o decpcap.o cui.o inodee.o devices.o -o nethogs -lpcap -lm -lncurses -DVERSION=\”0\” -DSUBVERSION=\”8\” -DMINORVERSION=  g++ -g -Wall -Wextra decpcap_test.cpp decpcap.o -o decpcap_test -lpcap -lm  install -d -m 755 /usr/local/sbin  install -m 755 nethogs /usr/local/sbin  install -d -m 755 /usr/local/share/man/man8/  install -m 644 nethogs.8 /usr/local/share/man/man8/

這樣已經算是成功安裝完成，輸入指令 nethogs 即可檢視應用的寬帶占用情況。 

下圖是我開啟了2個指令視窗做的測試：