many changes

Elastic/elk_stack_ubuntu.txt

@@ -83,7 +83,7 @@ Add CRON tasks to renew automatically Letsencrypt certs::
     sudo crontab -e
 
     # Check or renew certs twice per day
-    0 12,18 * * * root letsencrypt renew
+    0 12,18 * * * letsencrypt renew
 
 
 

MacOS/mac_os.txt

@@ -2,6 +2,10 @@
 Mac OS
 ======
 
+Remote connect::
+
+    https://support.apple.com/en-us/HT201710
+
 
 Create bootable flash
 ---------------------
@@ -10,8 +14,17 @@ Mac OS Sierra - http://www.macworld.com/article/3092900/macs/how-to-create-a-boo
 
 
 
-
-
+Brew
+----
+
+Installation::
+
+    /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
+
+
+Install some app::
+
+    brew install <app>
 
 
 

curl.txt

@@ -6,3 +6,8 @@ curl
 Hide output::
 
     curl -s 'http://example.com' > /dev/null
+
+
+Basic auth::
+
+    curl -u user:password https://example.com

haproxy.txt

@@ -40,6 +40,23 @@ haproxy.cfg::
         stick match <pattern> [table <table>] [{if | unless} <cond>]
 
 
+
+Proxy to backend depending on hostname. Only https. If hostname rule is not exist - proxy to default backend::
+
+    frontend https-front-session
+            bind *:443 ssl crt /etc/ssl/key.pem
+            bind *:80
+            redirect scheme https if !{ ssl_fc }
+
+            default_backend back-session
+
+            acl is_old hdr_end(host) -i old.example.com
+            use_backend old_example if is_old
+
+            acl is_new hdr_end(host) -i new.example.com
+            use_backend new_example if is_new
+
+
 SSL backend::
 
     backend be
@@ -69,6 +86,15 @@ That's all you need to use HATop::
     sudo hatop -s /run/haproxy/admin.sock
 
 
+HAProxy + LetsEncrypt
+---------------------
+
+::
+
+    sudo apt install letsencrypt
+
+
+
 
 
 Geolocation
@@ -83,4 +109,5 @@ Sticky session
 
 - http://blog.haproxy.com/2012/03/29/load-balancing-affinity-persistence-sticky-sessions-what-you-need-to-know/
 - https://docs.oracle.com/cd/E37670_01/E41138/html/section_jyh_zhz_4r.html
-- 
+
+

linux_commands.txt

@@ -63,6 +63,12 @@ adduser <name> // создать нового пользователя
 		-r	# create system user
 		-g 	# group
 
+
+Add existing user to existing group::
+
+	sudo usermod -a -G groupName userName
+
+
 useradd
 		-u			# UID
 		-r			# create system user
@@ -104,6 +110,15 @@ lsblk	// вывести инфу о дисках
 sudo dmidecode -t system	// информация об аппаратной составляющей компьютера (можно узнать какая машина - виртуальная или физическая)
 
 
+CPU benchmark::
+
+    apt install sysbench
+    sysbench --test=cpu --cpu-max-prime=20000 run
+
+
+
+
+
 ################## уменьшаем размер *.vdi ######################
 sudo dd if=/dev/zero of=zero bs=512k // на гостевой машине - заполнить нулями пустое место (после чего этот файл надо удалить)
 	bs= // размер сектора

nginx.txt

@@ -67,4 +67,27 @@ Change the Nginx default server block ``/etc/nginx/sites-available/default``::
     }
 
 
+NGINX log off
+-------------
+
+Off images access loging in access_log::
+
+    location ~* \.(gif|jpg|png) {
+	    access_log off;
+    }
+
+
+Change images access logimg location::
+
+    location ~* \.(gif|jpg|png)$ {
+	    access_log /path/to/access.log;
+    }
+
+
+Off access loging to dir and subdir::
+
+    location ^~ /images/ {
+	    access_log off;
+    }
+
 

qemu.txt

@@ -3,4 +3,11 @@ qemu-system-x86_64
 =================== 
 
 
+Show supported machines types::
 
+    qemu-system-x86_64 -machine help
+
+
+Create image::
+
+    qemu-img create -f qcow2 /path/to/image.qcow2 15g

ssl.txt

@@ -107,5 +107,5 @@ Add CRON tasks (auto renew)::
     sudo crontab -e
 
     # Check or renew certs twice per day
-    30 12 * * * root letsencrypt renew
-    0 18 * * * root letsencrypt renew
+    30 12 * * * letsencrypt renew
+    0 18 * * * letsencrypt renew

vnc.txt

@@ -0,0 +1,10 @@
+===
+VNC
+===
+
+xtightvncviewer
+---------------
+
+::
+
+    xtightvncviewer IP -quality 0