I wrote this quick & dirty bandwidth monitor for use with htop. It also displays the average bandwidth for the last 10 seconds.<\/p>\n
It displays a line similar to this at the top of the screen: Usage is simple: I wrote this quick & dirty bandwidth monitor for use with htop. It also displays the average bandwidth for the last 10 seconds. It displays a line similar to this at the top of the screen: eth0:RX:600b TX:944b Avg:77b eth2:RX:0b TX:0b Avg:0b Usage is simple: $ .\/bw.monitor.php & htop<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[],"class_list":["post-488","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/blog.the-erm.com\/index.php?rest_route=\/wp\/v2\/posts\/488","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.the-erm.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.the-erm.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.the-erm.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.the-erm.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=488"}],"version-history":[{"count":10,"href":"https:\/\/blog.the-erm.com\/index.php?rest_route=\/wp\/v2\/posts\/488\/revisions"}],"predecessor-version":[{"id":517,"href":"https:\/\/blog.the-erm.com\/index.php?rest_route=\/wp\/v2\/posts\/488\/revisions\/517"}],"wp:attachment":[{"href":"https:\/\/blog.the-erm.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=488"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.the-erm.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=488"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.the-erm.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\neth0:RX:600b TX:944b Avg:77b eth2:RX:0b TX:0b Avg:0b<\/code><\/p>\n
\n$ .\/bw.monitor.php & htop <\/code>
\n<\/p>\n\r\n#!\/usr\/bin\/php\r\n<?php\r\n set_time_limit(0);\r\n define('ESC',chr(27));\r\n $ignore_interfaces = array('lo','wlan0');\r\n function human($bytes, $decimals = 1) {\r\n $sz = 'bkmgtp';\r\n $factor = floor((strlen($bytes) - 1) \/ 3);\r\n if ($factor >= 1) {\r\n return sprintf(\"%.{$decimals}f%s\", $bytes \/ pow(1024, $factor), @$sz[$factor]);\r\n }\r\n return sprintf(\"%d%s\", $bytes \/ pow(1024, $factor),@$sz[$factor]);\r\n }\r\n \/*\r\n $data=\"Inter-| Receive | Transmit\r\n face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed\r\n lo: 70513902 759179 0 0 0 0 0 0 70513902 759179 0 0 0 0 0 0\r\n eth2: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0\r\n eth0: 591403745 1474829 0 0 0 0 0 1492 2162660750 2294779 0 0 0 0 0 0\";\r\n *\/\r\n $map = array(\r\n 2 => 'RX',\r\n 10 => 'TX'\r\n );\r\n $last_data = array();\r\n $readout = array();\r\n $total = array();\r\n $history = array();\r\n $cnt = 0;\r\n while (true) {\r\n $matches = array();\r\n $associated = array();\r\n $readout = array();\r\n $data = file_get_contents('\/proc\/net\/dev');\r\n preg_match_all('\/([a-z0-9]+)\\:\\s+([0-9]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\\s+([\\d]+)\/msu',$data, $matches, PREG_SET_ORDER);\r\n if (!$matches) {\r\n sleep(1);\r\n continue;\r\n }\r\n $cnt++;\r\n \/\/ echo $data;\r\n \/\/ print_r($matches);\r\n \r\n foreach ($matches as $match) {\r\n $interface = $match[1]; \r\n if (in_array($interface, $ignore_interfaces)) {\r\n continue;\r\n }\r\n if (!isset($total[$interface])) {\r\n $total[\"$interface\"] = 0;\r\n }\r\n if (!isset($history[$interface])) {\r\n for ($i=0;$i<20;$i++) {\r\n $history[\"$interface\"][] = 0;\r\n }\r\n }\r\n $associated[$interface] = array();\r\n foreach ($map as $k=>$v) {\r\n $associated[$interface][$v] = $match[$k];\r\n }\r\n }\r\n \/\/ print_r($associated);\r\n foreach ($associated as $i=>$d) {\r\n if (isset($last_data[$i])) {\r\n foreach ($d as $k=>$v) {\r\n $diff = $v - $last_data[$i][$k];\r\n $readout[\"$i\"][\"$k\"] = human($diff);\r\n $total[\"$i\"] = ($total[\"$i\"] + $diff);\r\n $history[\"$i\"][] = $diff;\r\n }\r\n $history[\"$i\"] = array_slice($history[\"$i\"], -20, 20);\r\n $readout[\"$i\"][\"Avg\"] = human(floor(array_sum($history[\"$i\"]) \/ (count($history[\"$i\"]) \/ 2)));\r\n \/\/ print_r($history);\r\n }\r\n }\r\n $last_data = $associated;\r\n \/\/ print_r($readout);\r\n echo ESC,'[s';\r\n echo ESC,'[0;0H';\r\n echo ESC,'[K';\r\n ksort($readout);\r\n foreach ($readout as $i=>$d) {\r\n echo $i,':';\r\n foreach ($d as $k=>$v) {\r\n printf(\"%-10s\", \"$k:$v\");\r\n }\r\n \/\/ echo \" \";\r\n }\r\n \/\/ echo 'mem:',human(memory_get_usage(),2);\r\n echo ESC,'[u';\r\n flush();\r\n sleep(1);\r\n }\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"