Kelvin's tech-box

Topic

tips

A collection of 11 issues

GPG generate issue

When I run gpg --gen-key I got the following error message: Not enough random bytes available. Please do some other work to givethe OS a chance to collect more entropy! Soution: Open a new terminal and run find / > /dev/null This will help gpg key generation finish ASAP

Useful shell

check the keyword in response header $ curl -vvvsH "Host: software-center.ubuntu.com" -H "Accept-Encoding: gzip" http://91.189.89.82/api/2.0/applications/en/ubuntu/precise/i386/ 2>&1 > /dev/null | grep 'ETag\|X-Cache\|Content-Length\|Content-Type' kill the pid of

git tips

How to create git repository on server $ git init -bare —shared test.git $ git update-server-info Create tag # Annotated Tags $ git tag -a v1.4 -m 'my version 1.4' # Lightweight Tags $ git tag v1.4-lw Sharing Tags git push origin --tags Check out Tags $ git checkout -b version2

Tips for git repository migration to other server

Recently I am going to use the private git repository that hosting on the webfactionfrom my own server. During the migration I met some issues, here are some tips should be noticed. When create the new repository, don't forget: git config http.receivepack true If you are using

Tar command usage

Create the tar file tar -czvp -f archive.tar.gz foo bar Create archive.tar.gz from files foo and bar with the preserved permission tar -cjvp -f archive.tar.bz2 foo bar How to split the file: split -b 4000k archive.tar.gz archive.20120829.tar.gz. -verbose creating

Delete files with find results

When you tried to delete all files with the name abc.txt under the folder /home/kelvin, try the following commands(one of them works): find /home/kelvin -name abc.txt | xargs rm -rf find /home//kelvin -name abc.txt -exec rm -fv {} \; Refer the doc: http://www.linuxsir.org/

Start service automatically on linux server

Add the service as automatically startup 1. copy the startup script to /etc/init.d 2. sudo chmod 755 /etc/init.d/your_script 3. run the following commonds cd /etc/init.d sudo upate-rc.d your_script defaults xx(xx is the start sequence number) Remove the startup service

How to use the SSH in the proxy env

Sometimes you are working in the coperation dev environemnt and you found you stay behind the firewall, some ports are blocked, such as 22, and you have to access internet via corperation proxy server, but you do need to use ssh to connect some site outside of office. This post

How to fix error when install Fabric

Installing collected packages: pycrypto, paramiko Running setup.py install for pycrypto warning: GMP library not found; Not building Crypto.PublicKey._fastmath. building 'Crypto.Hash.MD2' extension gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -fwrapv -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch ppc -arch x86_64 -pipe -std=c99 -O3 -fomit-frame-pointer

Common useful commands

* Copy remote single file to local scp username@host:/Users/xx/copyFile ./localDir * Copy remote directory to local scp -R username@host:/Users/xx/copyFile ./localDir * Delete all .svn folders recursively in current directory (Include the files in folders) find ./ -name ".svn" -type d -exec rm -rf {} \; * Delete