NAME<\/a> lnstat \u2212 unified linux network statistics<\/p>\n lnstat<\/b> [options<\/i>]<\/p>\n This manual page documents briefly the lnstat<\/b> command.<\/p>\n lnstat<\/b> is a generalized and more feature-complete replacement for the old rtstat program. It is commonly used to periodically print a selection of statistical values exported by the kernel. In addition to routing cache statistics, it supports any kind of statistics the linux kernel exports via a file in \/proc\/net\/stat\/.<\/p>\n Each file in \/proc\/net\/stat\/ contains a header line listing the column names. These names are used by lnstat<\/b> as keys for selecting which statistics to print. For every CPU present in the system, a line follows which lists the actual values for each column of the file. lnstat<\/b> sums these values up (which in fact are counters) before printing them. After each interval, only the difference to the last value is printed.<\/p>\n Files and columns may be selected by using the -f<\/b> and -k<\/b> parameters. By default, all columns of all files are printed.<\/p>\n lnstat supports the following options. Show summary of options.<\/p>\n \u2212V, \u2212\u2212version<\/b><\/p>\n Show version of program.<\/p>\n \u2212c, \u2212\u2212count Print \u2212d, \u2212\u2212dump<\/b><\/p>\n Dump list of available files\/keys.<\/p>\n \u2212f, \u2212\u2212file Statistics file to use, may be specified multiple times. By default all files in \/proc\/net\/stat are scanned.<\/p>\n \u2212i, \u2212\u2212interval Set interval to \u2019intv\u2019 seconds.<\/p>\n \u2212j, \u2212\u2212json<\/b><\/p>\n Display results in JSON format<\/p>\n \u2212k, \u2212\u2212keys k,k,k,…<\/b><\/p>\n Display only keys specified. Each key k<\/b> is of the form [file:]key<\/b>. If \u2212s, \u2212\u2212subject [0-2]<\/b><\/p>\n Specify display of subject\/header. \u20190\u2019 means no header at all, \u20191\u2019 prints a header only at start of the program and \u20192\u2019 prints a header every 20 lines.<\/p>\n \u2212w, \u2212\u2212width n,n,n,…<\/b><\/p>\n Width for each field.<\/p>\n # lnstat -d<\/b><\/p>\n Get a list of supported statistics files.<\/p>\n # lnstat -k arp_cache:entries,rt_cache:in_hit,arp_cache:destroys<\/b><\/p>\n Select the specified files and keys.<\/p>\n # lnstat -i 10<\/b><\/p>\n Use an interval of 10 seconds.<\/p>\n # lnstat -f ip_conntrack<\/b><\/p>\n Use only the specified file for statistics.<\/p>\n # lnstat -s 0<\/b><\/p>\n Do not print a header at all.<\/p>\n # lnstat -s 20<\/b><\/p>\n Print a header at start and every 20 lines.<\/p>\n # lnstat -c -1 -i 1 -f rt_cache -k entries,in_hit,in_slow_tot<\/b><\/p>\n Display statistics for keys entries, in_hit and in_slow_tot of field rt_cache every second.<\/p>\n \/proc\/net\/stat\/arp_cache, \/proc\/net\/stat\/ndisc_cache<\/b><\/p>\n Statistics around neighbor cache and ARP. arp_cache<\/b> is for IPv4, ndisc_cache<\/b> is the same for IPv6.<\/p>\n entries<\/b> Number of entries in the neighbor table.<\/p>\n allocs<\/b> How many neighbor entries have been allocated.<\/p>\n destroys<\/b> How many neighbor entries have been removed.<\/p>\n hash_grows<\/b> How often the neighbor (hash) table was increased.<\/p>\n lookups<\/b> How many lookups were performed.<\/p>\n hits<\/b> How many lookups<\/b> were successful.<\/p>\n res_failed<\/b> How many neighbor lookups failed.<\/p>\n rcv_probes_mcast<\/b> How many multicast neighbor solicitations were received. (IPv6 only.)<\/p>\n rcv_probes_ucast<\/b> How many unicast neighbor solicitations were received. (IPv6 only.)<\/p>\n periodic_gc_runs<\/b> How many garbage collection runs were executed.<\/p>\n forced_gc_runs<\/b> How many forced garbage collection runs were executed. Happens when adding an entry and the table is too full.<\/p>\n unresolved_discards<\/b> How many neighbor table entries were discarded due to lookup failure.<\/p>\n table_fulls<\/b> Number of table overflows. Happens if table is full and forced GC run (see forced_gc_runs<\/b>) has failed.<\/p>\n \/proc\/net\/stat\/ip_conntrack, \/proc\/net\/stat\/nf_conntrack<\/b><\/p>\n Conntrack related counters. ip_conntrack<\/b> is for backwards compatibility with older userspace only and shows the same data as nf_conntrack<\/b>.<\/p>\n entries<\/b> Number of entries in conntrack table.<\/p>\n searched<\/b> Number of conntrack table lookups performed.<\/p>\n found<\/b> Number of searched<\/b> entries which were successful.<\/p>\n new<\/b> Number of conntrack entries added which were not expected before.<\/p>\n invalid<\/b> Number of packets seen which can not be tracked.<\/p>\n ignore<\/b> Number of packets seen which are already connected to a conntrack entry.<\/p>\n delete<\/b> Number of conntrack entries which were removed.<\/p>\n delete_list<\/b> Number of conntrack entries which were put to dying list.<\/p>\n insert<\/b> Number of entries inserted into the list.<\/p>\n insert_failed<\/b> Number of entries for which list insertion was attempted but failed (happens if the same entry is already present).<\/p>\n drop<\/b> Number of packets dropped due to conntrack failure. Either new conntrack entry allocation failed, or protocol helper dropped the packet.<\/p>\n early_drop<\/b> Number of dropped conntrack entries to make room for new ones, if maximum table size was reached.<\/p>\n icmp_error<\/b> Number of packets which could not be tracked due to error situation. This is a subset of invalid<\/b>.<\/p>\n expect_new<\/b> Number of conntrack entries added after an expectation for them was already present.<\/p>\n expect_create<\/b> Number of expectations added.<\/p>\n expect_delete<\/b> Number of expectations deleted.<\/p>\n search_restart<\/b> Number of conntrack table lookups which had to be restarted due to hashtable resizes.<\/p>\n \/proc\/net\/stat\/rt_cache<\/b><\/p>\n Routing cache statistics.<\/p>\n entries<\/b> Number of entries in routing cache.<\/p>\n in_hit<\/b> Number of route cache hits for incoming packets. Deprecated since IP route cache removal, therefore always zero.<\/p>\n in_slow_tot<\/b> Number of routing cache entries added for input traffic.<\/p>\n in_slow_mc<\/b> Number of multicast routing cache entries added for input traffic.<\/p>\n in_no_route<\/b> Number of input packets for which no routing table entry was found.<\/p>\n in_brd<\/b> Number of matched input broadcast packets.<\/p>\n in_martian_dst<\/b> Number of incoming martian destination packets.<\/p>\n in_martian_src<\/b> Number of incoming martian source packets.<\/p>\n out_hit<\/b> Number of route cache hits for outgoing packets. Deprecated since IP route cache removal, therefore always zero.<\/p>\n out_slow_tot<\/b> Number of routing cache entries added for output traffic.<\/p>\n out_slow_mc<\/b> Number of multicast routing cache entries added for output traffic.<\/p>\n gc_total<\/b> Total number of garbage collection runs. Deprecated since IP route cache removal, therefore always zero.<\/p>\n gc_ignored<\/b> Number of ignored garbage collection runs due to minimum GC interval not reached and routing cache not full. Deprecated since IP route cache removal, therefore always zero.<\/p>\n gc_goal_miss<\/b> Number of garbage collector goal misses. Deprecated since IP route cache removal, therefore always zero.<\/p>\n gc_dst_overflow<\/b> Number of destination cache overflows. Deprecated since IP route cache removal, therefore always zero.<\/p>\n in_hlist_search<\/b> Number of hash table list traversals for input traffic. Deprecated since IP route cache removal, therefore always zero.<\/p>\n out_hlist_search<\/b> Number of hash table list traversals for output traffic. Deprecated since IP route cache removal, therefore always zero.<\/p>\n
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