bash, mac, git, linux, nano, vmware, zabbix, openvpn

MacOS/mac_os.txt

@@ -2,6 +2,47 @@
 Mac OS instructions
 ===================
 
+Manipulating OS X login items from command line
+
+- https://hamstergene.github.io/post/editing-osx-login-items-cmdline/
+- http://hints.macworld.com/article.php?story=20111226075701552
+
+
+Snoop new processes as they are executed, ``creatbyproc.d`` for files::
+
+    sudo newproc.d
+    sudo creatbyproc.d
+
+
+List memory usage in real time::
+
+    sudo fs_usage | grep -v 0.0000
+
+
+Force flush cached memory::
+
+    sudo sync && sudo purge
+
+
+Enable/disable swapping in Mac OS X (not checked solution)::
+
+    # to disable swap (pager daemon)
+    sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.dynamic_pager.plist
+
+    # after stopping pager daemon, you may want to remove swapfiles
+    sudo rm /private/var/vm/swapfile*
+
+    # to enable swap, you need to boot in Single Mode (Hold [CMD + S] at booting time) and run this command:
+    sudo launchctl load /System/Library/LaunchDaemons/com.apple.dynamic_pager.plist
+
+
+Remove RecoveryHD partition::
+
+    diskutil list
+    diskutil eraseVolume HFS+ Blank /dev/<RecoveryHD_ID>
+    diskutil mergePartitions HFS+ <nameOfMainDisk> <mainDisk_ID> <RecoveryHD_ID>
+
+
 List of users (with information)::
 
     dscacheutil -q user
@@ -133,7 +174,7 @@ Create user agent::
     # drwxr-xr-x    3 spider  staff   102 Apr 28 16:46 LaunchAgents
 
 
-Disabled jobs are stored in ``/var/db/com.apple.xpc
+Disabled jobs are stored in ``/var/db/com.apple.xpc``
 
 ::
 

MacOS/mac_programming.txt

@@ -7,6 +7,19 @@ AppleScript Programming/System Events
 
 https://en.wikibooks.org/wiki/AppleScript_Programming/System_Events
 
+Loop (repeat) - http://alvinalexander.com/apple/applescript-for-loop-while-loop-examples
+
+
+Show all processes of application::
+
+    tell application "Finder"
+       set l to get name of every process
+
+       repeat with i in l
+            log i
+       end repeat
+    end tell
+
 
 Pass command-line arguments to AppleScript ``osascript script.scpt hello world``. ``script.scpt``::
 
@@ -15,6 +28,119 @@ Pass command-line arguments to AppleScript ``osascript script.scpt hello world``
     end run
 
 
+Debug UI elements (dirty)::
+
+    #!/usr/bin/osascript
+
+    tell application "Messages"
+	    activate
+    end tell
+
+    tell application "System Events"
+	    get properties
+	    if UI elements enabled then
+		    tell process "Messages"
+
+			    set t1 to get every UI element
+			    log t1 & "\n"
+
+			    tell window "Messages"
+				    set t1 to get every UI element
+			        log t1 & "\n"
+
+			        tell sheet 1
+			            set t1 to get every UI element
+			            log "get every UI element"
+			            log t1 & "\n"
+
+			            tell scroll area 1
+			                set t1 to get every UI element
+			                log "get every UI element"
+			                log t1 & "\n"
+
+                            tell UI element 1
+                                set t1 to get every UI element
+			                    log "get every UI element"
+			                    log t1 & "\n"
+
+			                    tell group 1
+			                        set t1 to get every UI element
+			                        log "get every UI element"
+			                        log t1 & "\n"
+
+			                        tell group 2
+			                            set t1 to get every UI element
+			                            log "get every UI element"
+			                            log t1 & "\n"
+
+			                            tell static text "Apple ID Locked"
+			                            if not (exists) then
+										    log "FALSE"
+									    else
+									        log "TRUE"
+									    end if
+
+									    end tell
+
+			                        end tell
+
+			                    end tell
+
+                            end tell
+
+                            set t1 to get every button
+        			        log t1 & ".\n"
+			            end tell
+
+			            set t1 to get every static text
+				        log t1 & "\n"
+			        end tell
+
+				    set t1 to get every button
+				    log t1 & "\n"
+
+				    set t1 to get properties of every button
+				    log t1 & "\n"
+
+				    set t1 to get every UI element of every button
+				    log t1 & "\n"
+
+				    set t1 to get every static text
+				    log t1 & "\n"
+
+				    set t1 to get properties of every static text
+				    log t1 & "\n"
+
+				    set t1 to get every UI element of every static text
+				    log t1 & "\n"
+
+				    set t1 to get every scroll bar
+				    log t1 & "\n"
+
+				    get properties of every scroll bar
+				    get every UI element of every scroll bar
+
+				    (*get every UI element ¬
+					    whose class is not button and class is not static text ¬
+					    and class is not scroll bar
+				    get properties of every UI element ¬
+					    whose class is not button and class is not static text ¬
+					    and class is not scroll bar*)
+
+			    end tell
+
+		    end tell
+	    else
+		    tell application "System Preferences"
+			    activate
+			    set current pane to pane "com.apple.preference.universalaccess"
+			    display dialog "UI element scripting is not enabled. Check \"Enable access for assistive devices\""
+		    end tell
+	    end if
+    end tell
+
+
+
 ::
 
     /System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -switchToUserID ${uid}

OpenVPN.txt

@@ -0,0 +1,11 @@
+=======
+OpenVPN
+=======
+
+Configuration
+-------------
+
+Server config::
+
+    # Allow multiple user connections
+    duplicate-cn

bash.txt

@@ -3,6 +3,21 @@ BASH
 ====
 
 
+http://talk.jpnc.info/bash_lfnw_2017.pdf
+
+
+Bash get last line from a variable::
+
+    echo "${VAR##*$'\n'}"
+
+
+Is file exist::
+
+    if [ ! -f /tmp/foo.txt ]; then
+        echo "File not found!"
+    fi
+
+
 Functions on BASH::
 
     #!/bin/sh
@@ -68,9 +83,6 @@ Multiline file creating::
 	EOF
 
 
-::
-
-
 Make sure only root can run our script::
 
     if [[ $EUID -ne 0 ]]; then

git.txt

@@ -4,6 +4,9 @@ Git
 
 https://git-scm.com/book/ru/v2
 
+
+Delete credentials from GIT repository [rus] - https://the-bosha.ru/2016/07/01/udaliaem-sluchaino-zakomichennye-privatnye-dannye-iz-git-repozitoriia/
+
 Force “git pull” to overwrite local files::
 
     # Downloads the latest from remote without trying to merge or rebase anything

linux_commands.txt

@@ -2,6 +2,19 @@
 Linux commands
 ==============
 
+Empty pagecache, dentries and inodes::
+
+    # run as root
+    free -h && sync && echo 3 > /proc/sys/vm/drop_caches && free -h
+
+
+Flush swap::
+
+    # run as root
+    swapoff -a && swapon -a
+
+
+
 Show count of processes of some user::
 
     ps aux  | awk '{print $1}' | grep <user> | wc -l

nano.txt

@@ -2,16 +2,19 @@
 nano
 ====
 
+Find+replace in **nano** press next combination::
 
+    [Ctrl]+[\] 
+    Enter your search term      [return] 
+    Enter your replacement term [return] 
+    [A]                           # to replace all instances 
 
 
-Show line nums - CTRL+C (without dynamic change), or::
+Show line nums - ``[CTRL]+[C]`` (without dynamic change), or::
 
     nano -c <file>
 
 
 Thus to display line numbers always when using nano::
 
-    nano ~/.nanorc
-        set const
-
+    echo 'set const' >> ~/.nanorc

vmware.txt

@@ -56,5 +56,7 @@ VMWare command line
     # set VM state to a snapshot
     vmrun revertToSnapshot <path_to.vmx> <snapshot_name>
 
+    # remove a snapshot from a VM
+    vmrun deleteSnapshot <path_to.vmx> <snapshot_name> [andDeleteChildren]
 
 

zabbix.txt

@@ -41,6 +41,14 @@ https://www.zabbix.com/documentation/3.0/ru/manual/encryption/using_pre_shared_k
 - Configure host in Zabbix-server to use PSK. Need to wait some time, before Zabbix cache update.
 
 
+Zabbix server 3.2
+-----------------
+
+Configuration
+^^^^^^^^^^^^^
+
+``/usr/share/zabbix/conf/zabbix.conf.php``
+
 
 
 Zabbix agent 3.0