Section 8: administration and privileged commands
networkd-dispatcher – Dispatcher service for systemd-networkd connection status changes Synopsis networkd-dispatcher [-h] [-S SCRIPT_DIR] [-T] [-v] [-q] Description Dispatcher daemon for systemd-networkd connection status changes. This daemon is similar to NetworkManager-dispatcher, but is much more limited in the types of events it supports due to the limited nature of systemd-networkd(8). Desired actions (scripts) are placed…
netutils_selinux – Security Enhanced Linux Policy for the netutils processes Description Security-Enhanced Linux secures the netutils processes via flexible mandatory access control. The netutils processes execute with the netutils_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier. For example: ps -eZ | grep…
netstat – Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships Synopsis netstat [address_family_options] [–tcp|-t] [–udp|-u] [–udplite|-U] [–sctp|-S] [–raw|-w] [–l2cap|-2] [–rfcomm|-f] [–listening|-l] [–all|-a] [–numeric|-n] [–numeric-hosts] [–numeric-ports] [–numeric-users] [–symbolic|-N] [–extend|-e[–extend|-e]] [–timers|-o] [–program|-p] [–verbose|-v] [–continuous|-c] [–wide|-W] netstat {–route|-r} [address_family_options] [–extend|-e[–extend|-e]] [–verbose|-v] [–numeric|-n] [–numeric-hosts] [–numeric-ports] [–numeric-users] [–continuous|-c] netstat {–interfaces|-i} [–all|-a] [–extend|-e[–extend|-e]] [–verbose|-v] [–program|-p] [–numeric|-n] [–numeric-hosts]…
netsniff-ng – the packet sniffing beast Synopsis netsniff-ng { [options] [filter-expression] } Description netsniff-ng is a fast, minimal tool to analyze network packets, capture pcap files, replay pcap files, and redirect traffic between interfaces with the help of zero-copy packet(7) sockets. netsniff-ng uses both Linux specific RX_RING and TX_RING interfaces to perform zero-copy. This is…
netromd – Send and receive NET/ROM routing messages Synopsis netromd [-c] [-d] [-i] [-l] [-p pause] [-q quality] [-t interval] [-v] Description For a NET/ROM based network to operate correctly, a periodic broadcast of routing information needs to occur. Typically this occurs once every hour on every port which is expected to carry NET/ROM traffic….
ax25_call, netrom_call, rose_call, tcp_call – make an AX.25, NET/ROM, ROSE or TCP connection Synopsis ax25_call [-c] [-i paclen] [-o paclen] port local_call remote_call [digipeaters …] netrom_call [-c] [-i paclen] [-o paclen] port local_call remote_netrom_addr rose_call [-c] [-i paclen] [-o paclen] port local_call remote_call remote_rose_addr tcp_call [-c] [-i paclen] [-o paclen] remote_addr remote_port Description ax25_call, netrom_call,…
netplugd – network cable hotplug management daemon Synopsis netplugd [-FP ] [-c config_file ] [-i interface_pattern ] [-p pid_file ] Description netplugd is a daemon that responds to network link events from the Linux kernel, such as a network interface losing or acquiring a carrier signal. When an Ethernet-style network interface on a host is…
netplan-try – try a configuration, optionally rolling it back Synopsis netplan [-debug] try -h | -help netplan [-debug] try [-config-file CONFIG_FILE] [-timeout TIMEOUT] Description netplan try takes a netplan(5) configuration, applies it, and automatically rolls it back if the user does not confirm the configuration within a time limit. This may be especially useful on…
netplan-generate – generate backend configuration from netplan YAML files Synopsis netplan [-debug] generate -h | -help netplan [-debug] generate [-root-dir ROOT_DIR] [-mapping MAPPING] Description netplan generate converts netplan YAML into configuration files understood by the backends (systemd-networkd(8) or NetworkManager(8)). It does not apply the generated configuration. You will not normally need to run this directly…
netplan-apply – apply configuration from netplan YAML files to a running system Synopsis netplan [-debug] apply -h | -help netplan [-debug] apply Description netplan apply applies the current netplan configuration to a running system. The process works as follows: 1. The backend configuration is generated from netplan YAML files. 2. The appropriate backends (systemd-networkd(8) or…
netlogond_selinux – Security Enhanced Linux Policy for the netlogond processes Description Security-Enhanced Linux secures the netlogond processes via flexible mandatory access control. The netlogond processes execute with the netlogond_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier. For example: ps -eZ | grep…
netlabelctl – NetLabel management utility Synopsis netlabelctl [<global_flags>] <module> [<module_commands>] Description The NetLabel management utility, netlabelctl, is a command line program designed to allow system administrators to configure the NetLabel system in the kernel. The utility is based around different "modules" which correspond to the different types of NetLabel commands supported by the kernel. Options…
netlabel_selinux – Security Enhanced Linux Policy for the netlabel processes Description Security-Enhanced Linux secures the netlabel processes via flexible mandatory access control. Nsswitch Domain File Contexts SELinux requires files to have an extended attribute to define the file type. You can see the context of a file using the -Z option to lsP Policy governs…
netlabel_mgmt_selinux – Security Enhanced Linux Policy for the netlabel_mgmt processes Description Security-Enhanced Linux secures the netlabel_mgmt processes via flexible mandatory access control. The netlabel_mgmt processes execute with the netlabel_mgmt_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier. For example: ps -eZ | grep…
netlabel-config – NetLabel configuration utility Synopsis netlabelctl reset| load Description The NetLabel configuration utility, netlabel-config, is a script designed to make it easier for system administratiors to create, manage, and use complex NetLabel configurations. The netlabel-config script uses the netlabelctl(8) tool and /etc/netlabel.rules configuration file to load a saved NetLabel configuration into the kernel and…
nethogs – Net top tool grouping bandwidth per process Synopsis nethogs [-h] [-V] [-d] [-v] [-t] [-c] [-p] [-s] [device(s)] Description NetHogs is a small ‘net top’ tool. Instead of breaking the traffic down per protocol or per subnet, like most such tools do, it groups bandwidth by process – and does not rely on…
netdump-server – handle crash dumps over the network Synopsis netdump-server [–port portnumber] [–addr address] [–concurrent number] [–pidfile path] [–dumpdir path] [–daemon] [–secure <0|1>] [–help] [–usage] Description Listens to the network for clients that crash and uses the netdump protocol to recieve a memory dump and a stack trace. The memory dump and oops message are…
netdevstat – tool for recording network activity Synopsis netdevstat [update interval] [total duration] [display histogram] Description netdevstat is a simple systemtap script to record network activity of processes and display statistics for transmit/receive operations. update interval Sets sampling interval in seconds. total duration Sets total measurement time in seconds. display histogram If this parameter is…
netcap – a program to see capabilities Synopsis netcap Description netcap is a program that prints out a report of process capabilities. If the application is using tcp, udp, raw, or packet family of sockets AND has any capabilities, it will be in the report. If the process has partial capabilities, it is further examined…
net2kiss – convert a network AX.25 driver to a KISS stream on a pseudo-tty Synopsis net2kiss [-sfzva] [-i ifname] ptyname Description net2kiss takes AX.25 packets from an AX.25 kernel network interface and converts them into a KISS data stream via a pseudo-tty. Parameters ptyname specifies the path to the pseudo-tty. If you use the special…