2013年6月12日星期三

[Linux] Hbase shell

# Use for commands:
help 'command', status, list, describe 'tablename'
*The status shows the basic status of the cluster.
status 'simple'
status 'detailed'

# Create tables:
create 'tablename', {NAME=>'family 1'}, {NAME=>'family 2'}
create 'tablename', 'family1', 'family2'

# Scan table:
scan 'tablename'
*Restrict columns: {COLUMNS=>'family:'}, {COLUMNS=>['c1', 'c2']
*Restrict number of results: {LIMIT=>number}
*Restrict start / stop row: {STARTROW=>'start row key', ENDROW=>'end row key'}

# Count:
count 'tablename', 5000
*Here 5000 is means report results every 5000 rows.

# Delete:
delete 'table', 'rowkey', 'colkey(family:column)'
delete 'table', 'rowkey'
*Delete all rows in the table.
truncate 'tablename'

# Remove table:
*First you need to disable the table, and then you can drop table.
disable 'tablename'
drop 'tablename'

# Change column family:
*Must disable table first, and then change column family
alter 'tablename', {NAME=>'family', METHOD=>'delete'}

- Hbase files stored as HFiles in HDFS.
- sorted key/value pairs and an index of keys.
- /hbase/tablename/region/column-family

[Linux] Screen command

Use screen on remote machine.

screen [-AmRvx -ls -wipe] [-d name] [-h lines] [-r name] [-s] [-S name]

screen -r pid.name: recover a screen work.
screen -d -r pid.name : recover a screen work, kick off other user on this work and start.
screen -ls
screen -m : start a new screen.
screen -dm : a new screen start with detached model.
screen -p number or name

Ctrl + a + d : quit screen with process still running.
exit : quit screen.

Ctrl + a + c : create a new window.
Ctrl + a + w : list windows.
Ctrl + a + n : next window.
Ctrl + a + p : previous window.
Ctrl + a + 0 ~ 9 : switch between window 0 to 9.
Ctrl + a + K : quit current window and jump to next.

2013年2月10日星期日

[Work] Using Git

Working in a small company will need git to commit your code and cooperate with other people.
Here is a list of command lines usually used.

Clone the main repository to your workspace:
git clone git@github.p.com:user/project.git

Add your fork:
git remote add myname git@github.p.com:user/project.git

Reset to latest code by running:
git checkout master
git fetch origin
git reset --hard origin/master

Setup your branch:
git branch your_branch_name

Make changes to your code and push it for others to see:
git push myname new_feature_branch

Hacker way, commit often:
git commit -a -m "message"

Modify commit list:
git rebase -i master

Setup git default edit and global information:
git config --global user.name "your name"
git config --global user.email "your email"
git config --global core.editor vim

More about:
git diff master
git pull

Other git commands:

git config --global user.name "robbin"   
git config --global user.email "fankai#gmail.com"
git config --global color.ui true
git config --global alias.co checkout
git config --global alias.ci commit
git config --global alias.st status
git config --global alias.br branch
git config --global core.editor "mate -w"    # 设置Editor使用textmate
git config -1 #列举所有配置
用户的git配置文件~/.gitconfig Git常用命令 查看、添加、提交、删除、找回,重置修改文件
git help   # 显示command的help
git show            # 显示某次提交的内容
git show $id

git co  --    # 抛弃工作区修改
git co  .           # 抛弃工作区修改

git add       # 将工作文件修改提交到本地暂存区
git add .           # 将所有修改过的工作文件提交暂存区

git rm        # 从版本库中删除文件
git rm  --cached  # 从版本库中删除文件,但不删除文件

git reset     # 从暂存区恢复到工作文件
git reset -- .      # 从暂存区恢复到工作文件
git reset --hard    # 恢复最近一次提交过的状态,即放弃上次提交后的所有本次修改

git ci 
git ci .
git ci -a           # 将git add, git rm和git ci等操作都合并在一起做
git ci -am "some comments"
git ci --amend      # 修改最后一次提交记录

git revert <$id>    # 恢复某次提交的状态,恢复动作本身也创建了一次提交对象
git revert HEAD     # 恢复最后一次提交的状态
查看文件diff
git diff      # 比较当前文件和暂存区文件差异
git diff
git diff <$id1> <$id2>   # 比较两次提交之间的差异
git diff .. # 在两个分支之间比较 
git diff --staged   # 比较暂存区和版本库差异
git diff --cached   # 比较暂存区和版本库差异
git diff --stat     # 仅仅比较统计信息
查看提交记录
git log
git log       # 查看该文件每次提交记录
git log -p    # 查看每次详细修改内容的diff
git log -p -2       # 查看最近两次详细修改内容的diff
git log --stat      #查看提交统计信息
tig Mac上可以使用tig代替diff和log,brew install tig Git 本地分支管理 查看、切换、创建和删除分支
git br -r           # 查看远程分支
git br  # 创建新的分支
git br -v           # 查看各个分支最后提交信息
git br --merged     # 查看已经被合并到当前分支的分支
git br --no-merged  # 查看尚未被合并到当前分支的分支

git co      # 切换到某个分支
git co -b  # 创建新的分支,并且切换过去
git co -b    # 基于branch创建新的new_branch

git co $id          # 把某次历史提交记录checkout出来,但无分支信息,切换到其他分支会自动删除
git co $id -b   # 把某次历史提交记录checkout出来,创建成一个分支

git br -d   # 删除某个分支
git br -D   # 强制删除某个分支 (未被合并的分支被删除的时候需要强制)
 分支合并和rebase
git merge                # 将branch分支合并到当前分支
git merge origin/master --no-ff  # 不要Fast-Foward合并,这样可以生成merge提交

git rebase master        # 将master rebase到branch,相当于:
git co  && git rebase master && git co master && git merge 
 Git补丁管理(方便在多台机器上开发同步时用)
git diff > ../sync.patch         # 生成补丁
git apply ../sync.patch          # 打补丁
git apply --check ../sync.patch  #测试补丁能否成功
 Git暂存管理
git stash                        # 暂存
git stash list                   # 列所有stash
git stash apply                  # 恢复暂存的内容
git stash drop                   # 删除暂存区
Git远程分支管理
git pull                         # 抓取远程仓库所有分支更新并合并到本地
git pull --no-ff                 # 抓取远程仓库所有分支更新并合并到本地,不要快进合并
git fetch origin                 # 抓取远程仓库更新
git merge origin/master          # 将远程主分支合并到本地当前分支
git co --track origin/branch     # 跟踪某个远程分支创建相应的本地分支
git co -b  origin/  # 基于远程分支创建本地分支,功能同上

git push                         # push所有分支
git push origin master           # 将本地主分支推到远程主分支
git push -u origin master        # 将本地主分支推到远程(如无远程主分支则创建,用于初始化远程仓库)
git push origin    # 创建远程分支, origin是远程仓库名
git push origin :  # 创建远程分支
git push origin :  #先删除本地分支(git br -d ),然后再push删除远程分支
Git远程仓库管理 github
git remote -v                    # 查看远程服务器地址和仓库名称
git remote show origin           # 查看远程服务器仓库状态
git remote add origin git@ github:robbin/robbin_site.git         # 添加远程仓库地址
git remote set-url origin git@ github.com:robbin/robbin_site.git # 设置远程仓库地址(用于修改远程仓库地址)
git remote rm        # 删除远程仓库
创建远程仓库
git clone --bare robbin_site robbin_site.git  # 用带版本的项目创建纯版本仓库
scp -r my_project.git git@ git.csdn.net:~      # 将纯仓库上传到服务器上

mkdir robbin_site.git && cd robbin_site.git && git --bare init # 在服务器创建纯仓库
git remote add origin git@ github.com:robbin/robbin_site.git    # 设置远程仓库地址
git push -u origin master                                      # 客户端首次提交
git push -u origin develop  # 首次将本地develop分支提交到远程develop分支,并且track

git remote set-head origin master   # 设置远程仓库的HEAD指向master分支
也可以命令设置跟踪远程库和本地库
git branch --set-upstream master origin/master
git branch --set-upstream develop origin/develop