| 參數命令 | 作用 |
|---|---|
| -i iface | 網絡接口：立即在指定網絡接口上開啟IP流量監視,iface為all指監視所有的網絡接口，iface指相應的interface |
| -g | 立即開始生成網絡接口的概要狀態信息 |
| -d iface | 網絡接口：在指定網絡接口上立即開始監視明細的網絡流量信息,iface指相應的interface |
| -s iface | 網絡接口：在指定網絡接口上立即開始監視TCP和UDP網絡流量信息,iface指相應的interface |
| -z iface | 網絡接口：在指定網絡接口上顯示包計數,iface指相應的interface |
| -l iface | 網絡接口：在指定網絡接口上立即開始監視局域網工作站信息,iface指相應的interface |
| -t timeout | 時間：指定iptraf指令監視的時間，timeout指監視時間的minute數 |
| -B | 將標注輸出重新定向到“/dev/null”，關閉標注輸入，將程序作為后臺進程運行 |
| -L logfile | 指定一個文件用于記錄所有命令行的log，默認文件是地址：/var/log/iptraf |
| -I interval | 指定記錄log的時間間隔（單位是minute），不包括IP traffic monitor |
| -u | 允許使用不支持的接口作為以太網設備 |
| -f | 清空所有計數器 |
| -h | 顯示幫助信息 |
方法五、watch ifconfig
watch命令可以反復的執行一個命令，默認時間間隔為2秒鐘。
watch ifconfig 可以每隔兩秒監視網絡狀態、
watch -d ifconfig 可以每隔兩秒監視網絡狀態, 并標記發生變化的部分
watch -d ifconfig eth0 可以每隔兩秒只監視 網卡eth0, 并標記發生變化的部分
watch -d 'ifconfig eth0 | grep bytes' 可以每隔一秒只監視網卡eth0,只顯示流量部分,并標記發生變化的部分
watch也可以用來查看文件變化的情況，例如：
例如 watch ls -la file，這條命令的意思是沒兩秒察看 file1的文件大小變化情況。
退出： ctrl+c
watch命令詳解
NAME
watch - execute a program periodically, showing output fullscreen
SYNOPSIS
watch [-dhvt] [-n seconds>] [--differences[=cumulative]] [--help] [--interval=seconds>] [--no-title] [--version] command>
DESCRIPTION
watch runs command repeatedly, displaying its output (the first screenfull). This allows you to watch the program output change over time. By default, the program is run every 2 seconds; use -n or --interval to specify a different interval.
The -d or --differences flag will highlight the differences between successive updates. The --cumulative option makes highlighting "sticky", presenting a running display of all positions that have ever changed. The -t or --no-title option turns off the header showing the interval, command, and current time at the top of the display, as well as the following blank line. watch will run until interrupted.
NOTE
Note that command is given to "sh -c" which means that you may need to use extra quoting to get the desired effect.
Note that POSIX option processing is used (i.e., option processing stops at the first non-option argument). This means that flags after command don't get interpreted by watch itself.
EXAMPLES
To watch for mail, you might do: watch -n 60 from
To watch the contents of a directory change, you could use: watch -d ls -l
If youre only interested in files owned by user joe, you might use: watch -d 'ls -l #124; fgrep joe'
You can watch for your administrator to install the latest kernel with: watch uname -r (Just kidding.)呵呵
BUGS
Upon terminal resize, the screen will not be correctly repainted until the next scheduled update. All --differences highlighting is lost on that update as well.
Non-printing characters are stripped from program output. Use "cat -v" as part of the command pipeline if you want to see them.
方法六、
watch cat /proc/net/dev
