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10:50, 15 November 2024 Xbl talk contribs created page Simple Mail Transfer Protocol (Created page with "= smtp = == Send mail using telnet == <code>telnet localhost 25</code> Connect to the server <code>HELO 6bit.ch</code> Greet the server. <code>MAIL FROM: [email protected]</code> Set the FROM field <code>RCPT TO: [email protected]</code> Set the TO field <code>DATA</code> Enter message, starting with 'Subject:', followed by message body and ending with '.'")
23:16, 8 October 2024 Xbl talk contribs created page Simple Network Management Protocol (Created page with "= SNMP = SNMP is the blackest of magical arts.")
13:07, 26 September 2024 Xbl talk contribs created page ESXi Update (Created page with "= ESXi Update = == Backup Current Config == <code>vim-cmd hostsvc/firmware/sync_config</code> sync running config <code>vim-cmd hostsvc/firmware/backup_config</code> download config == Update ESXi Version == <code>esxcli software sources profile list -d /vmfs/volumes/250/VMware-ESXi-7.0U3-18644231-depot.zip</code> show available profiles in depot <code>esxcli software profile update -d /vmfs/volumes/250/VMware-ESXi-7.0U3-18644231-depot.zip -p ESXi-7.0U3-...")
09:50, 16 August 2024 Xbl talk contribs created page Proxmox USB-Backup (Created page with "== Ziel == Proxmox-VMs auf externe, wechselnde USB-Disk(s) sichern. == Weg zum Ziel == USB-Disks können ab Proxmox 8 mit der x-systemd.automount-Option über ''/etc/fstab'' automatisch gemounted werden. Da die Gerätepfade nicht konstant sind werden Regeln mit ''udev'' erstellt, welche die USB-Disks verlässlich am gleichen Ort präsentieren. === Nur für NTFS-formatierte Platten: ntfs-3g installieren (WebGUI Shell/SSH) === Nativ kann Linux NTFS nur als RO mounten, da...")
16:37, 20 May 2024 Xbl talk contribs created page Supermicro IPMI (Created page with "= Supermicro IPMI = == Fan Control== <code>ipmitool raw 0x30 0x70 0x66 0x01 0x00 0x09</code> Set Fans 0x00 to 9%. <code>ipmitool raw 0x30 0x70 0x66 0x01 0x01 0x09</code> Set Fans 0x01 to 9%. Fan Setting in BMC must be set to Full.")
13:26, 21 August 2023 Xbl talk contribs created page Aho Weinberger Kernighan (Created page with "= awk = is a full scripting language, as well as a complete text manipulation toolkit for the command line. == Use == <code>who | awk '{print $1}'</code> print the first field of every line from the who command <code>who | awk '{print $1,$4}'</code> print the first and fourth field of every line from the who command <code>who | awk '{print $NF}'</code> print the last field (NF=Number of Fields) of every line from the who command <code>date | a...")
11:55, 21 August 2023 Xbl talk contribs created page Diagnostic Messages (Created page with "= dmesg = May be used on most Unix-like operating systems to query th message buffer of the kernel. The output includes messages produced by the device drivers. == Use == <code>dmesg | tail</code> show latest messages == Useful Flags == <code>-D</code> disable printing messages to console <code>-E</code> enable printing messages to console <code>-l <level></code> restrict output to defined level <code>-w</code> print messages and wait for new...")
15:16, 17 March 2023 Xbl talk contribs created page Format and Print Data (Created page with "= printf = Print ARGUMENT(S) according to FORMAT, or execute according to OPTION. <code>printf FORMAT [ARGUMENT]</code> <code>printf OPTION</code> FORMAT controls the output as in C printf. Interpreted sequences are: <code>\n</code> new line <code>%s</code> output as string <code>%d</code> output as integer Example: <code>printf '%s\n' yolo</code>")
15:29, 10 March 2023 Xbl talk contribs created page OpenVPN (Created page with "=== OpenVPN Config === Enable legacy encryption (do not ask for private key password) <code>providers legacy default</code>")
12:48, 27 February 2023 Xbl talk contribs created page IPTables (Created page with "== IPTables == Administration tool for IPv4 packet filtering and NAT == Use == <code>iptables -S</code> show active filters and fail2bans")
15:15, 24 February 2023 Xbl talk contribs created page Journal Control (Created page with "= journalctl = May be used to query the contents of the systemd(1) journal as written by systemd-journald.service(8). == Use == <code>journalctl -xe</code> show last 1000 messages in a pager <code>journalctl -f</code> follow latest messages <code>journalctl -t sshd</code> show messages of a particular service == Useful Flags == <code>-p <priority></code> show messages with $priority and above only <code>-b <priority></code> show messages sinc...")
11:32, 24 February 2023 Xbl talk contribs created page Tunable Filesystem (Created page with "= tune2fs = Adjust tunable filesystem parameters on ext2/ext3/ext4 filesystems == Use == <code>tune2fs -l /dev/XY</code> Show current values of options on /dev/XY <code>tune2fs -m Z /dev/XY</code> Set root reserved block percentage to Z on /dev/XY")
22:08, 3 January 2023 Xbl talk contribs created page Hardening (Created page with "= nginx = === HTTP Config === /etc/nginx/nginx.conf: <code>server_tokens off</code> Stop the server from advertising versions <code>add_header X-Frame-Options SAMEORIGIN always</code> Stop the website to be framed into other websites <code>add_header X-Content-Type-Options nosniff</code> Avoid MIME type sniffing by saying that the MIME types are deliberately configured <code>add_header X-XSS-Protection "1; mode=block"</code> lock pages from loading w...")
16:27, 30 December 2022 Xbl talk contribs created page Global Regular Expression Print (Created page with "= grep = Print lines from text that match patterns, basic regex is used by default == Use == <code>grep /etc/ssh/sshd_config pattern</code> match pattern in /etc/sshd_config, case sensitive == Useful Flags == <code>-E</code> use extended regex <code>-i</code> case insensitive <code>-A x</code> print x lines after matched pattern <code>-B x</code> print x lines before matched pattern <code>-C x</code> print x lines before and after matched...")
16:07, 30 December 2022 Xbl talk contribs created page Find (Created page with "= find = Search for files in a directory hierarchy. The command is recursive by default. == Use == <code>find /var/www -name '*.css'</code> prints full path/filename to all files in /var/www that end in .css <code>-name</code> filename matches string(case sensitive) <code>-iname</code> filename matches string(case insensitive) <code>-regex</code> filename matches regex(case sensitive) <code>-iregex</code> filename matches regex(case insensitive)</b...")
12:57, 2 December 2022 Xbl talk contribs deleted page System and Service Manager (content was: "= systemd = Systemd is a suite of basic building blocks for a Linux system. It provides a system and service manager that runs as PID 1 and starts the rest of the system. == Use == <code>systemctl status <unit></code> show status <code>systemctl start <unit></code> start $unit <code>systemctl stop <unit></code> stop $unit <code>systemctl is-enabled <unit></code...", and the only contributor was "Xbl" (talk))
10:34, 2 December 2022 Xbl talk contribs created page Network Statistics (Created page with "= netstat = Gives an overview of network activities and displays which ports are open or have established connections. The netstat tool is essential for discovering network problems. == Use == <code>netstat</code> show lists of ''active'' connections The first list shows internet connections: '''Proto''' – Protocol of the connection (TCP, UDP) '''Recv-Q''' – Receive queue of bytes received or ready to be received '''Send-Q''' – Send...")
17:00, 30 November 2022 Xbl talk contribs created page Table of Processes (Created page with "= top = Provides a dynamic real-time view of a running system. Load is a complex value, designating the balance between required and available CPU power. Load <1: The system has some idle time Load =1: The system has as much work as it can handle Load >1: The system has to prioritize some processes over others Load >3: The system is probably not fit for the current workload Load >10: The system may have a serious problem Load >30...")
15:19, 30 November 2022 Xbl talk contribs created page Process Control (Created page with "= kill = Sends a signal to a process id. == Use == <code>kill -s <signal> <pid></code> send <signal> (SIGTERM if not defined) to <pid> == Useful Flags == <code>-L</code> display list of signals == Most Important Signals == <code>SIGINT / 2</code> INTERRUPT (Same as Ctrl+c) cancel a running process <code>SIGKILL / 9</code> kills process <code>SIGTERM / 15</code> terminates a program cleanly <code>SIGSTOP / 17</code> stops a running foreground...")
22:31, 28 November 2022 Xbl talk contribs created page Tape Archive (Created page with "= tar = Packs and may compress multiple files a tarball or writes to magnetic tape. == Use (BSD-Style)== <code>tar xf example.tar</code> extract (x) tarball example.tar (f) to . <code>tar cf example.tar</code> create (c) tarball example.tar (f) to . == Useful Flags == <code>t</code> list contents to stdout <code>v</code> verbose output <code>z</code> de-/compress with gzip <code>j</code> de-/compress with bzip")
22:18, 28 November 2022 Xbl talk contribs created page Data Duplicator (Created page with "= dd = Convert and copy a file. Also, write to tape == Use == <code>dd if=<PATH> of=<PATH></code>duplicate infile to outfile == Useful Flags == <code>bs=<BYTES></code> read and write up to BYTES bytes at a time (default: 512) <code>count=<N></code> copy only N input blocks")
22:11, 28 November 2022 Xbl talk contribs created page Magnetic Tape (Created page with "= mt = Controls magnetic tape drives. == Use == <code>mt [-f </dev/st0>] status</code> Show status of <device> == Useful Flags ==")
17:39, 25 November 2022 Xbl talk contribs created page Process Snapshot (Created page with "= ps = Shows running processes and their IDs. == Use == <code>ps</code> show running processes of current user in current terminal <code>ps aux</code> BSD-style, show all running processes (-a) with user column (-u) inside and outside terminals (-x) == Useful Flags == <code>-f</code> show full information <code>-F</code> show fullest information <code>-u <user></code> show processes running from $user <code>-g <group></code> show pr...")
13:01, 25 November 2022 Xbl talk contribs created page System and Service Manager (Created page with "= systemd = Systemd is a suite of basic building blocks for a Linux system. It provides a system and service manager that runs as PID 1 and starts the rest of the system.")
12:43, 25 November 2022 Xbl talk contribs created page Advanced Package Tool (Created page with " = apt = Updates and upgrades installed software. Uses dpkg to install and uninstall. Repos are defined in <code>/etc/apt/sources.list</code>, usually non-free repos are disabled by default. == Use == <code>apt update</code> check for updates <code>apt upgrade</code> install updates <code>apt dist-upgrade</code> install updates and new dependencies, remove old versions <code>apt list --installed </code> list installed packages <code>...")
11:36, 25 November 2022 Xbl talk contribs created page System Control (Created page with "= sysctl = Reads/sets kernel settings from the virtual /proc file system. Values can be edited directly with <code>echo 1/0 >> /proc/net/ipv6/conf/all/disable_ipv6</code> or by editing /etc/sysctl.conf or /etc/sysctl.d/parameter. == setting settings == <code>sysctl -a</code> list all settings <code>sysctl -a | grep net.ipv6.conf.all.disable_ipv6</code> list specific setting <code>sysctl net.ipv6.conf.all.disable_ipv6</code> list specific setting <co...")
15:20, 24 October 2022 Xbl talk contribs created page Network Mapping (Created page with "= nmap = == default options == <code>nmap host-ip</code> scan first 1000 ports on $host-ip == scan specific port == <code>nmap -p x host-ip</code> scan tcp port $x on $host-ip == The Six Port States Recognized by nmap == '''open''' An application is actively accepting TCP connections, UDP datagrams or SCTP associations on this port. Finding these is often the primary goal of port scanning. Security-minded people know that each open port is an ave...")
15:05, 14 October 2022 Xbl talk contribs deleted page Terminal Multiplayer (content was: "= tmux = == navigating == <code>Ctr-b leftarrow</code> move active window horizontally <code>Ctr-b rightarrow</code> move active window horizontally <code>Ctr-b uparrow</code> move active window vertically <code>Ctr-b downarrow</code> move active window vertically == listing, creating, renaming, killing == <code>tmux ls</code> list sessions <code>tmux kill -t se...", and the only contributor was "Xbl" (talk))
15:05, 14 October 2022 Xbl talk contribs created page Terminal Multiplexer (Created page with "= tmux = == navigating == <code>Ctr-b leftarrow</code> move active window horizontally <code>Ctr-b rightarrow</code> move active window horizontally <code>Ctr-b uparrow</code> move active window vertically <code>Ctr-b downarrow</code> move active window vertically == listing, creating, renaming, killing == <code>tmux ls</code> list sessions <code>tmux kill -t sessionname</code> kill tmux session with name $sessionname <code>tmux new -s ses...")
21:10, 12 October 2022 Xbl talk contribs created page Terminal Multiplayer (Created page with "= tmux = == navigating == leftarrow : move active window horizontally rightarrow : move active window horizontally uparrow : move active window vertically downarrow : move active window vertically == creating, renaming, deleting == tmux new -s sessionname : create tmux session with name $sessionname tmux rename -t sessionname newname : rename session to $newname tmux attach -t sessionname : attach to $sessionname tmux ls : list sessio...")
16:54, 7 May 2022 Xbl talk contribs created page SELinux (Created page with "= SELinux = == Available Commands == === Mode Management === <code>sestatus</code> show runtime status and boolean values (-b) <code>getenforce</code> show current mode of operation <code>setenforce</code> switch operating mode temporarily === Context Management === <code>chcon</code> change file contexts (does not survive file system relabeling) <code>restorecon</code> restore default file contexts, referencing /etc/selinux/targeted/contexts/fil...")
22:04, 5 May 2022 Xbl talk contribs created page Firewall (Created page with "= firewall-cmd = == Available Commands == === General === <code>--state</code> display the status <code>--reload</code> reload firewall rules from zone files, all runtime changes are lost <code>--permanent</code> store a change persistently === Zones === <code>--get-default-zone</code> show the name of the default/active zone <code>--set-default-zone</code> set the name of the default zone, always permanent <code>--get-zones</code> show ava...")
21:58, 2 May 2022 Xbl talk contribs created page Network Devices and Connections (Created page with "= Manual Configuration = Create file in /etc/sysconfig/network-scripts/ifcfg-ifname Populate file with: <code>TYPE=Ethernet PROXY_METHOD=none BROWSER_ONLY=no BOOTPROTO=static [dhcp, none] DEFROUTE=yes IPV4_FAILURE_FATAL=no UUID=sd55sd-sdfss5li-lkjawq NAME=ens256 ONBOOT=yes IPADDR=192.168.1.11 NETMASK=255.255.255.0 GATEWAY=192.168.1.1 DNS1=192.168.1.53</code> = nmcli = == Available Commands == === O...")
14:47, 29 March 2022 Xbl talk contribs created page GRUB2 (Created page with "= Reset Root Password = 1. enter GRUB2 edit mode 2. modify linux-kernel string by adding <code>rd.break</code> at the end 3. press CTRL+x to boot with entered options 4. use chroot to mount /sysroot to / <code>chroot /sysroot</code>, pwd should read <code>/</code> 5. remount the root file system in read/write mode <code>mount -o remount,rw /</code> 6. run passwd to set new password <code>passwd</code> 7. create hidden file .autorelabel to run SELinux relabeling on...")
08:34, 28 March 2022 Xbl talk contribs created page Bash Shell (Created page with "= CTRL Hotkeys = CTRL + a move to beginning CTRL + d escape current shell or delete character under cursor CTRL + e move to end CTRL + k delete all from cursor to end CTRL + l clear CTRL + n down arrow CTRL + p up arrow CTRL + q resume output CTRL + r backward search CTRL + s stop output CTRL + t switch character before cursor with cursor, ESC + t switches two words before the cursor CTRL + u cut lin...")
23:08, 22 March 2022 Xbl talk contribs created page Redhat Package Manager (Created page with "= rpm - query options = -q, --query ''package'' display package -qa, --query --all list all installed packages -qc, --query --configfiles ''package'' list config files in a package -qd, --query --docfiles ''package'' list documentation files in a package -qf, --query --file ''file'' display what package a file comes from -qi, --query --info ''package'' display installed package information -qip, --query --info --package ''package''</b...")
12:37, 16 March 2022 Xbl talk contribs moved page /vim to Vi IMproved without leaving a redirect
12:35, 16 March 2022 Xbl talk contribs moved page /dwm to Dynamic Window Manager without leaving a redirect
12:35, 16 March 2022 Xbl talk contribs moved page Regex to Regular Expressions without leaving a redirect
12:34, 16 March 2022 Xbl talk contribs deleted page /lvm (content was: "= lvm = == extend disk == 1. add new hard disk 2. take note of current /dev/sdx 3. scan for new devices: <code>sudo /sbin/rescan-scsi-bus -w</code> Result: new device found 4. enter lvm as root: <code>sudo lvm</code> 5. create physical volume: <code>pvcreate /dev/sdy</code> 6. check volume groups: <code>vgs</code> 7. extend volume group: <code>vgextend volume-name /dev/sdy</...", and the only contributor was "Xbl" (talk))
12:33, 16 March 2022 Xbl talk contribs created page Logical Volume Management (Created page with "= lvm = == extend disk == 1. add new hard disk 2. take note of current /dev/sdx 3. scan for new devices: <code>sudo /sbin/rescan-scsi-bus -w</code> Result: new device found 4. enter lvm as root: <code>sudo lvm</code> 5. create physical volume: <code>pvcreate /dev/sdy</code> 6. check volume groups: <code>vgs</code> 7. extend volume group: <code>vgextend volume-name /dev/sdy</code> 8. check logical volumes: <code>lvs</code> 9. resize logical volume: <code>l...")
12:14, 16 March 2022 Xbl talk contribs created page /lvm (Created page with "= lvm = == extend disk == 1. add new hard disk 2. take note of current /dev/sdx 3. scan for new devices: <code>sudo /sbin/rescan-scsi-bus -w</code> Result: new device found 4. enter lvm as root: <code>sudo lvm</code> 5. create physical volume: <code>pvcreate /dev/sdy</code> 6. check volume groups: <code>vgs</code> 7. extend volume group: <code>vgextend volume-name /dev/sdy</code> 8. check logical volumes: <code>lvs</code> 9. resize logical volume: <code>l...")
18:31, 8 March 2022 Xbl talk contribs created page /vim (Created page with "= vim = == inserting == i : insert text before the current position I : insert text at the beginning of current line a : append text after the current position A : append text to the end of current line o : open new line below current line O : open new line above current line == navigating == h : move back one character j : move down one line k : move up one line l : move forward one character w : move to start of next...")
14:24, 25 February 2022 Xbl talk contribs created page Regex (Created page with "== Regular Expressions == {| class="wikitable" |- ! Metacharacter ! Description |- valign="top" !<code>\</code> |Escape character. |- |- valign="top" !<code>?</code> |Matches the preceding element zero or one time. For example, <code>ab?c</code> matches only "ac" or "abc". |- !<code>+</code> |Matches the preceding element one or more times. For example, <code>ab+c</code> matches "abc", "abbc", "abbbc", and so on, but not "ac". |- !<code><nowiki>|</nowiki></code> |The ch...")
23:01, 22 February 2022 Xbl talk contribs created page Mediawiki Cheatsheet (Created page with "== Mediawiki Cheatsheet == {| style="border:none; text-align:left; background:#f0f0f0; font-size: 95%;" |- | width="25%" style="background: #e4e4e4; padding: 3px 5px; text-align:center;"|'''Description''' | style="background: #e4e4e4; padding: 3px 5px; text-align:center;"|'''You type''' | width="25%" style="background: #e4e4e4; padding: 3px 5px; text-align:center;"|'''You get''' |- | colspan="3" style="background: #e4e4e4; padding: 3px 5px; font-family: sans-serif; fo...")
22:58, 22 February 2022 Xbl talk contribs created page /dwm (Created page with "== Hotkeys == ;Navigation :to workspace ::win+{num} :to next/previous monitor ::win+, ::win+. :rotate clockwise ::win+j :rotate counterclockwise ::win+k :Zoom ::win+v ;Move windows :to workspace ::win+shift+{num} :to next/previous monitor ::win+shift+, ::win+shift+.")
22:23, 17 February 2022 Xbl talk contribs created page Basic Commands (Created page with "=ls= -a, --all do not ignore entries starting with . -h, --human-readable with -l and -s, print sizes like 1K 234M 2G etc -l use a long listing format -r, --reverse reverse order while sorting -t sort by time, newest first")
00:17, 15 February 2022 Xbl talk contribs changed group membership for Lea from (none) to bureaucrat
00:12, 15 February 2022 User account Lea talk contribs was created by Xbl talk contribs (<3)
00:05, 15 February 2022 Xbl talk contribs created page Test (Test)

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