Initial

.editorconfig

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+
+
+	[*]
+		end_of_line		= lf
+		indent_style	= tab
+		tab_width		= 4

.gitignore

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+
+**/*_
+**/.#*
+**/0*
+**/1*
+**/2*
+**/3*
+**/4*
+**/5*
+**/6*
+**/7*
+**/8*
+**/9*
+
+**/*.log*
+**/*log
+**/LOG*
+
+cache/**
+data/**
+old/**
+outer/**
+secret/**

README.MD

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+
+
+| A                                       | B                                       |
+|-----------------------------------------|-----------------------------------------|
+|                                         | [Linux](docs/linux/common.md)           |
+|                                         | [MariaDB](docs/progs/mariadb.md)        |
+|                                         | [MC](docs/progs/mc.md)                  |
+|                                         | [Socat](docs/progs/socat.md)            |
+| [Math](docs/math.md)                    | [Crontab](docs/progs/crontab.md)        |
+|                                         | [Kubernetes](docs/progs/kubernetes.md)  |
+|                                         | [NMCli](docs/progs/nmcli.md)            |
+| [Math](docs/math.md)                    | [SSH](docs/progs/ssh.md)                |
+|                                         | [GIT](docs/progs/git.md)                |
+|                                         | [PHP](docs/progs/php.md)                |

docs/linux/common.md

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+
+[File systems](filesystems.md)
+
+[Fedora / CentOS](fedora.md)
+
+[SELinux](selinux.md)
+
+# Common
+
+## find
+```
+find /var -maxdepth 2 -type d -printf "%TY-%Tm-%Td %TH:%TM:%TS %Tz %p\n"
+```
+
+## bash
+```
+# cat > /etc/profile.d/cmp.sh
+
+export EDITOR=mcedit
+export HISTFILESIZE=10485760
+export HISTSIZE=500000
+export HISTCONTROL=ignoreboth:erasedups
+export HISTIGNORE="history:reboot:poweroff:cd:ls:pwd:mc:ps:m:e:l"
+export SSH_ASKPASS=
+
+alias ffi='ffmpeg -hide_banner -i'
+
+alias m='cd /mnt'
+alias e='cd /etc'
+alias l='cd /var/log'
+
+tabs -4
+
+```
+
+## reboot
+```bash
+echo 1 > /proc/sys/kernel/sysrq
+echo b > /proc/sysrq-trigger
+```
+
+## Motherboard name
+```bash
+cat /sys/devices/virtual/dmi/id/board_name
+```
+
+## grab video from screen
+```bash
+ffmpeg -s 1920x1080 -framerate 10 -f x11grab -i :0 -qscale 6 out.mkv
+```
+
+```bash
+ps --ppid 2 -p 2 --deselect
+```

docs/linux/fedora.md

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+# Fedora / CentOS / Etc
+
+## Relabel
+```bash
+touch /.autorelabel
+```
+
+## Install PHP 8
+```
+dnf install https://rpms.remirepo.net/fedora/remi-release-38.rpm
+dnf module reset php
+dnf module install php:remi-8.2
+```

docs/linux/filesystems.md

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+
+# LVM
+#### Extend
+```bash
+lvextend -L+1G /dev/vg4/homevol
+```
+
+# Btrfs
+#### Resize
+```bash
+btrfs filesystem resize max /mnt/dmp/
+```
+#### Defragment / compress
+```bash
+btrfs filesystem defragment -v -clzo /boot/*
+```
+#### Set RO / RW
+```bash
+btrfs property set -f . ro false
+btrfs property set -f . ro true
+```
+#### Create shapshot
+```bash
+btrfs subvolume snapshot xyz xyz-snapshot-path-name
+```
+#### Delete shapshot
+```bash
+btrfs subvolume delete xyz-snapshot-path-name
+```
+
+# Ext4
+#### Resize
+```bash
+resize2fs /dev/device [size]
+```
+
+#### if superblock fail
+```bash
+dumpe2fs /dev/sda5 | grep -i backup
+fsck -b 32768 /dev/sda5
+```

docs/linux/rsyslog.md

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+```
+$ModLoad imudp
+$UDPServerRun 514
+
+	template(name="cmpDate" type="list") {
+		property(name="timereported" dateformat="year")
+		constant(value="-")
+		property(name="timereported" dateformat="month")
+		constant(value="-")
+		property(name="timereported" dateformat="day")
+	}
+
+
+	set $.cmpDate = exec_template("cmpDate");
+	set $.cmpSuff = "default";
+
+	template(name="cmpOutFile" type="list") {
+		constant(value="/mnt/netlog/zzz/")
+
+		property(name="$.cmpDate")
+
+		constant(value="/")
+	#	property(name="hostname")
+		property(name="fromhost-ip")
+		constant(value="-")
+		property(name="$.cmpSuff")
+		constant(value=".log")
+	}
+
+	template(name="cmpOutFmt" type="list") {
+		property(name="$.cmpDate")
+
+		constant(value=" ")
+		property(name="timereported" dateformat="hour")
+		constant(value=":")
+		property(name="timereported" dateformat="minute")
+		constant(value=":")
+		property(name="timereported" dateformat="second")
+
+		constant(value=" ")
+		property(name="hostname")
+		constant(value=" ")
+
+		property(name="syslogtag")
+		property(name="msg" spifno1stsp="on" )
+		property(name="msg" droplastlf="on" )
+		constant(value="\n")
+	}
+
+
+	if( $fromhost-ip == "127.0.0.1" ) then {
+		stop
+	}
+
+	if ( $fromhost-ip == "172.16.1.1" ) then {
+		if ( $syslogtag contains "teg3" ) then {
+			set $.cmpSuff = "teg3";
+		}
+	}
+
+	action(type="omfile" dynafile="cmpOutFile" template="cmpOutFmt")
+
+	stop
+```

docs/linux/selinux.md

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+
+# Nginx
+```
+# Allow open local  port
+semanage port -a -t http_port_t  -p tcp 28081
+
+# Allow open remote port
+setsebool -P httpd_can_network_connect 1
+```

docs/other/math.md

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+
+# Аппроксимация функции одной переменной
+[https://planetcalc.ru/5992/](https://planetcalc.ru/5992/)

docs/progs/crontab.md

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+
+# Crontab
+
+```
+#	PATH=$PATH:/usr/local/bin
+#	LANG=
+#	LC_ALL=
+
+### on reboot
+#	@reboot   command
+
+### on time
+#	* * * * * command
+###	| | | | |
+###	| | | | |
+###	| | | | |
+###	| | | | |--| 0-7  день недели
+###	| | | |    |
+###	| | | |----| 1-12 месяц
+###	| | |      |
+###	| | |------| 1-31 день месяца
+###	| |        |
+###	| |--------| 0-23 часы
+###	|          |
+###	|----------| 0-59 минуты
+
+```
+

docs/progs/kubernetes.md

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+
+```bash
+mkdir -p $HOME/.kube
+sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
+sudo chown $(id -u):$(id -g) $HOME/.kube/config
+```
+
+Alternatively, if you are the root user, you can run:
+```bash
+export KUBECONFIG=/etc/kubernetes/admin.conf
+```
+
+You should now deploy a pod network to the cluster.
+Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
+https://kubernetes.io/docs/concepts/cluster-administration/addons/
+
+Then you can join any number of worker nodes by running the following on each as root:
+
+```bash
+kubeadm join 10.0.0.1:6443 --token 000000.0000000000000000 \
+--discovery-token-ca-cert-hash sha256:0000000000000000000000000000000000000000000000000000000000000000
+```

docs/progs/mariadb.md

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+
+# MariaDB
+
+## Create database, user and grand permission
+```sql
+CREATE DATABASE dbn CHARACTER SET utf8 COLLATE utf8_general_ci;
+CREATE USER 'usr'@'localhost' IDENTIFIED BY 'pwd'; GRANT ALL PRIVILEGES ON dbn.* TO usr@localhost;
+```

docs/progs/mc.md

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+# MC
+
+## ~/.config/mc/ini
+```ini
+[Layout]
+command_prompt=1
+free_space=1
+horizontal_equal=1
+horizontal_split=0
+keybar_visible=0
+left_panel_size=104
+menubar_visible=0
+message_visible=0
+output_lines=0
+top_panel_size=1
+vertical_equal=1
+xterm_title=0
+
+[Midnight-Commander]
+use_internal_view=1
+use_internal_edit=1
+alternate_plus_minus=1
+skin=darkfar
+
+editor_ask_filename_before_edit=false
+editor_backspace_through_tabs=false
+editor_backup_extension=~
+editor_check_new_line=false
+editor_cursor_after_inserted_block=false
+editor_cursor_beyond_eol=false
+editor_drop_selection_on_copy=true
+editor_edit_confirm_save=true
+editor_fake_half_tabs=false
+editor_filesize_threshold=64M
+editor_fill_tabs_with_spaces=false
+editor_group_undo=false
+editor_line_state=false
+editor_option_auto_para_formatting=false
+editor_option_save_mode=0
+editor_option_save_position=true
+editor_option_typewriter_wrap=false
+editor_persistent_selections=true
+editor_return_does_auto_indent=true
+editor_show_right_margin=false
+editor_simple_statusbar=false
+editor_state_full_filename=false
+editor_stop_format_chars=-+*\\,.;:&>
+editor_syntax_highlighting=true
+editor_tab_spacing=4
+editor_visible_spaces=true
+editor_visible_tabs=false
+editor_word_wrap_line_length=72
+```

docs/progs/nmcli.md

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+
+# Connection start
+```bash
+nmcli con up  ens18
+```
+
+# Connection modifity
+```bash
+ifc=eth0 \
+nmcli con mod $ifc ipv4.addresses 172.16.23.56/24 && \
+nmcli con mod $ifc ipv4.gateway   172.16.23.1     && \
+nmcli con mod $ifc ipv4.dns       172.16.20.130   && \
+nmcli con mod $ifc ipv4.method    manual          && \
+nmcli con mod $ifc ipv6.method    disable         && \
+nmcli con up  $ifc restart                        && \
+true
+```
+
+# Disable IPv6 for all
+```
+nmcli con show | awk '{if(NR > 1) { print $1; system("nmcli con mod " $1 " ipv6.method disable"); } }'
+```
+
+# Connection event
+```bash
+#!/bin/bash
+
+# This is /etc/NetworkManager/dispatcher.d/0167-cmp.sh
+
+# IFACE="$1" # DEVICE_IFACE
+# EVENT="$2" # NM_DISPATCHER_ACTION
+#					- connectivity-change
+#					- down
+#					- up
+#					- vpn-down
+#					- vpn-up
+#
+#
+
+	if [ "${NM_DISPATCHER_ACTION}" = "connectivity-change"  ]; then
+		if [ "${CONNECTIVITY_STATE}" = "FULL" ]; then
+			nmcli conn up ssh-37
+			exit 0
+		fi
+
+		if [ "${CONNECTIVITY_STATE}" = "LIMITED" ]; then
+			nmcli conn up ssh-37
+			exit 0
+		fi
+
+		if [ "${CONNECTIVITY_STATE}" = "NONE" ]; then
+			exit 0
+		fi
+
+		# exit 0
+	fi
+
+	if true; then
+		logger -t 0167-cmp.sh @=$@ "ENV" \
+			NM_DISPATCHER_ACTION=$NM_DISPATCHER_ACTION \
+			CONNECTION_UUID=$CONNECTION_UUID \
+			CONNECTION_ID=$CONNECTION_ID \
+			CONNECTION_DBUS_PATH=$CONNECTION_DBUS_PATH \
+			CONNECTION_FILENAME=$CONNECTION_FILENAME \
+			CONNECTION_EXTERNAL=$CONNECTION_EXTERNAL \
+			DEVICE_IFACE=$DEVICE_IFACE \
+			DEVICE_IP_IFACE=$DEVICE_IP_IFACE \
+			CONNECTIVITY_STATE=$CONNECTIVITY_STATE
+	fi
+
+```

docs/progs/php.md

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+
+## Set default timezone
+```
+	printf '[Date]\ndate.timezone = Asia/Katmandu\n' > /etc/php.d/17-cmp-timezone.ini
+```

docs/progs/socat.md

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+
+```bash
+socat PTY,link=/dev/vmodem0,echo=0,waitslave TCP:10.0.0.1:333
+```

docs/progs/ssh.md

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+# SSH
+
+## Generate public key from private
+```
+ssh-keygen -f id_rsa -y > id_rsa.pub
+```
+
+## Port forwarding
+```bash
+# forward : 172.16.0.1:80 -> 172.16.0.2 -> 127.0.0.1:4080
+ssh -f -N -L 4080:172.16.0.1:80 172.16.0.2
+```
+
+## Allow old algorithm
+```bash
+ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 -oHostKeyAlgorithms=+ssh-dss 172.16.0.1
+```