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Its quite hard to audit an system manually tbh

so devops makes this process easier, it still requires quite a lot of parsing though, something which makes anisble quite good because you can make your setup into a big list

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tldr linux executes a binary

the shell does a bunch of checks, then "execve(2)", the kernel loads the file into memory, has to be ELF format, does some checks depending on the header binary format (or sends the file of to an interpreter if the header bytes says so), creates virtual memory, manages interrupts and then the process is running. EASY! kek

#actuallyidontunderstandanyofthisshit #linux

The systemctl command is the primary tool to manage systemd.

/lib/* is read by the kernel and put into /run/*, /etc/* overrides defaults in /lib/* at runtime

just an idea anon

#linux #help

systemd-analyze --user unit-paths

based introspection command that spits out all used paths by systemd

#systemd #introspection

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how about that

the binaries themselves create the actual paths, so network manager creates the profiles at runtime. Now, where does systemctl load the files from ? Some binary i assume

#nmcli #networkmanager #runtime

nmcli -f all connection

“ hidden “ command that outputs all paths loaded by network manager, shows which configuration file is currently loaded in nmcli

““

NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT AUTOCONNECT-PRIORITY READONLY DBUS-PATH ACTIVE DEVICE STATE ACTIVE-PATH SLAVE FILENAME Wired connection 1 de8087bc-3aae-3487-8d60-1cc8a3e233a3 ethernet 1624640156 Fri 25 Jun 2021 06:55:56 PM CEST yes -999 no /org/freedesktop/NetworkManager/Settings/1 yes ens3 activated /org/freedesktop/NetworkManager/ActiveConnection/1 -- /run/NetworkManager/system-connections/Wired connection 1.nmconnection Wired connection 2 350eafed-57af-37ff-888e-7cc7cb29b91d ethernet 1624640156 Fri 25 Jun 2021 06:55:56 PM CEST yes -999 no /org/freedesktop/NetworkManager/Settings/2 yes ens7 activated /org/freedesktop/NetworkManager/ActiveConnection/2 -- /run/NetworkManager/system-connections/Wired connection 2.nmconnection

‘‘

#nmcli cmd #nmcli command #nmcli

what configures default networking in linux?

how tf does linux get its default network options? what creates them?

i can configure them manually in BELOW, but what makes the default/automatic config ?

sysconfig_network_files='/etc/sysconfig/network-scripts/' # files contained here: ifcfg-* systemd_network_files='/etc/systemd/network/' # *.link networkmanager_network_files='/etc/NetworkManager/system-connections/' # *.nmconnection

#linux #help #networking

Ethernet or 1Gbps is also known as Gigabit Ethernet or 1000BASE-T ethernet

how about dat

#lingo #slang #terms

henlo

i am bak bishes

#sup

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class a b c d networks are all obsolote and anybody that mentions them are gay

tfw you give your 10.x.x.x network a /24 subnet and the graybeards go nuts

nmconnection vs link vs ifcfg files

Wtf is the difference between .nmconnection .link and ifcfg-* files.

/etc/NetworkManager/system-connections/*.nmconnection = network manager configuration keyfiles https://developer.gnome.org/NetworkManager/stable/nm-settings-keyfile.html

/etc/systemd/network/*.link = systemd network configuration files using the ‘new’ syntax https://www.freedesktop.org/software/systemd/man/systemd.link.html

/etc/sysconfig/network-scripts/ifcfg-* = init scripts still used for legacy, it is processed by systemd anyways https://developer.gnome.org/NetworkManager/stable/nm-settings-ifcfg-rh.html

my systemd btw:

Linux centos 4.18.0-193.28.1.el8_2.x86_64 #1 SMP Thu Oct 22 00:20:22 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

#networkmanager #systemd #link-files #ifcfg #linux #redhat #centos

finding the right manpage is what you pay a sysadmin to do

SSHFS vs SFTP vs NFS vs Samba vs Webdav

fuck you webdav tbh

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WEBDAV HOW DO I ENABLE READ AND WRITE REEEEE

how

how is it possible for /etc/sysconfig/network/ and /etc/systemd/network/ to co-exist ? wtf, dosen’t one cancel out the other ?

#systemd #networking

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