release

MacOS/mac_os.txt

@@ -2,6 +2,16 @@
 Mac OS instructions
 ===================
 
+Get System Info on Mac OS::
+
+    hostinfo
+
+
+Get screencapture via terminal::
+
+    screencapture -xr -t gif capture.gif
+
+
 Turn on performance mode for macOS Server (OS X El Capitan 10.11 and later). Provides extended system limits (maxproc, etc.)::
 
     # check

bash.txt

@@ -5,6 +5,14 @@ BASH
 
 http://talk.jpnc.info/bash_lfnw_2017.pdf
 
+
+Add zeros before number::
+
+    VAR=15
+    echo "$(seq -f %03g $VAR $VAR)"
+    # 015
+
+
 BASH if grep ixists statement::
 
     if grep --quiet 'text' /path/to/file; then

dash.txt

@@ -0,0 +1,28 @@
+====
+DASH
+====
+
+Installation
+------------
+
+``dash-install.sh``::
+
+    DASH_VERSION="dash-0.5.9.1"
+    DASH_ARCHIVE="$DASH_VERSION.tar.gz"
+
+    curl -O http://gondor.apana.org.au/~herbert/dash/files/$DASH_ARCHIVE
+    tar -xf $DASH_ARCHIVE
+    rm $DASH_ARCHIVE
+    cd $DASH_VERSION/
+    ./configure
+    make
+    make install
+    echo "$(which dash)" >> /etc/shells
+    cd ..
+    rm -R $DASH_VERSION
+
+
+::
+
+    chmod +x dash-install.sh
+    ./dash-install.sh

git.txt

@@ -4,6 +4,80 @@ Git
 
 https://git-scm.com/book/ru/v2
 
+Development scheme
+------------------
+
+https://habrahabr.ru/post/106912/
+
+Branches:
+
+``master`` - permanent, stable. With tag
+``develop`` - permanent
+``feature`` - temporary
+``release`` - temporary
+``hotfix`` - temporary
+
+
+**Feature branches**. Can start from ``develop``. Must pull to develop.::
+
+    # Start new feature
+    git checkout -b myfeature develop
+
+    # End new feature
+    git checkout develop        # change branch
+    git merge --no-ff myfeature # merge branches
+    git branch -d myfeature     # delete feature branch
+    git push origin develop     # push changes to develop
+
+
+**Release branches**. Can start from ``develop``. Must pull to develop and master. Can be named alike ``release-*``.::
+
+    # Start release
+    git checkout -b release-1.2 develop
+    ./bump-version.sh 1.2                           # some changes in project
+    git commit -a -m "Bumped version number to 1.2"
+
+    # End release
+    git checkout master             # change branch
+    git merge --no-ff release-1.2   # merge branches
+    git tag -a 1.2                  # set tag
+
+    # Keep actual develop branch
+    git checkout develop
+    git merge --no-ff release-1.2
+
+    # Delete release branch
+    git branch -d release-1.2
+
+
+**Hotfix branches**. Can start from ``master``. Must pull to develop and master. Can be named alike ``hotfix-*``.::
+
+    # Start hotfix
+    git checkout -b hotfix-1.2.1 master
+    ./bump-version.sh 1.2.1             # some fixes in project
+    git commit -a -m "Bumped version number to 1.2.1"
+
+    git commit -m "Fixed severe production problem"
+
+    # End hotfix
+    git checkout master
+    git merge --no-ff hotfix-1.2.1
+    git tag -a 1.2.1
+
+    # Keep actual develop branch
+    git checkout develop
+    git merge --no-ff hotfix-1.2.1
+
+    # Delete hotfix branch
+    git branch -d hotfix-1.2.1
+
+
+
+
+
+Git tips and tricks
+-------------------
+
 Avoid **Are you sure you want to continue connecting (yes/no)** on connect via ssh keys::
 
     # bitbucket

libvirt_qemu_kvm_debian.txt

@@ -19,6 +19,49 @@ Check Debian source list ``sources.list``::
 
 
 
+qemu-system-x86_64
+------------------
+
+Show supported machines types::
+
+    qemu-system-x86_64 -machine help
+
+
+Networking - http://wiki.qemu.org/Documentation/Networking
+
+
+qemu-img
+--------
+
+Images and snapshots - http://azertech.net/content/kvm-qemu-qcow2-qemu-img-and-snapshots
+
+``qemu-img`` tool::
+
+    # Show information (size, backing files, snapshots)
+    qemu-img info <image.qcow2>
+
+    # Create a simple QCOW2 image file
+    qemu-img create -f qcow2 <image.qcow2> <max_capacity_in_gigabytes>g 
+
+    # Create a QCOW2 image linked with base image
+    qemu-img create -b <base_image> -f qcow2 -l <new_image> 
+
+    # List snapshots
+    qemu-img snapshot -l <imagename> 
+
+    # Create snapshot
+    qemu-img snapshot -c <snapshot-name> <imagename> 
+
+    # Apply snapshot
+    qemu-img snapshot -a <snapshot-name> <imagename>  
+
+    # Delete snapshot
+    qemu-img snapshot -d <snapshot-name> <imagename> 
+
+    # Clone image
+    qemu-img convert -p -f qcow2 <source_image> -O qcow2 <dest_image> 
+
+
 
 Nested virtualization
 ---------------------
@@ -67,6 +110,88 @@ Install KVM, libvirt
     /var/lib/libvirt/     # images, snapshots, etc.
 
 
+Libvirt
+-------
+
+``Domain.xml``::
+
+    # Port forwarding to machine::
+
+    <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
+    ...
+    <interface type='network'> -> <interface type='user'>
+    ...    
+    <qemu:commandline>
+       <qemu:arg value='-redir'/>
+       <qemu:arg value='tcp:2222::22'/>
+    </qemu:commandline>
+
+    # Custom loader::
+
+    <os>
+        <loader readonly='yes' type='pflash'>/path_to/OVMF_CODE-pure-efi.fd</loader>
+        <nvram>/path_to/fedora22_VARS.fd</nvram>
+    </os>
+
+
+
+Virsh CMD
+---------
+
+::
+
+    # enter in virsh session
+    virsh
+	    help		# список всех команд
+
+	    pool-list --all # список хранилищ (storages)
+	    pool-list	# список активных хранилищ (storages)
+
+	    pool-define-as name_of_storage dir --target /etc/libvirt/images/	# создаем хранилище
+	    pool-autostart name_of_storage	# делаем, чтобы пул запускадся автоматически
+	    pool-start name_of_storage	# стартуем пул
+
+
+    # define domain from XML (without run)
+    virsh define <file.xml>
+
+    # undefine domain from XML
+    virsh undefine <domain>
+    virsh undefine --nvram <domain> # remove nvram
+
+    # show domains list
+	virsh list          # run domains
+	virsh list --all    # all domains	    
+
+    # generate xml from domain
+	virsh dumpxml <domain> > <domain>.xml 
+
+    # create domain and start VM
+	virsh create <config.xml>
+
+    # remove domain and stop VM
+	virsh destroy alice
+
+    # shutdown VM
+	virsh shutdown <domain>
+
+    # suspend/resume VM
+	virsh suspend alice
+	virsh resume alice
+
+    # add domain to autostart on host run
+	virsh autostart <domain>
+
+    # get domain info
+	virsh dominfo <domain>
+
+	# Edit domain xml
+    virsh edit DOMAIN
+
+
+
+
+
 Bridge configuration
 --------------------
 

linux_commands.txt

@@ -2,6 +2,12 @@
 Linux commands
 ==============
 
+
+Get first line::
+
+    head -n 1
+
+
 Sleep for 1 second between each xargs command::
 
     ps aux | awk '{print $1}' | xargs -I % sh -c '{ echo %; sleep 1; }'

ovh.com.txt

@@ -2,4 +2,11 @@
 OVH.COM
 =======
 
-Kernel images by OVH **ftp://ftp.ovh.net/made-in-ovh/bzImage/**
+Kernels
+-------
+
+Kernel images by OVH ``ftp://ftp.ovh.net/made-in-ovh/bzImage/``
+
+
+
+