csv injection

If the csv file cell value uses formulas, it is often to see csv injection. For instance, if the cell value is  =cmd|' calc'!A0 which will launch calculator.

To prevent csv injection attack, you need either filtering or neutralizing the spreadsheet meta-characters used to define formulas. These 4 characters are +, -, =, and @

Filter is to remove the meta-characters if see excel cell value beginning with one of these 4 characters.

Neutralize is to precede cell values that begin with the characters: +, -, =, or @ with a single quote. This is called “escaping” or “neutralizing” the characters to have excel cell value interpreted as data instead of formulas.

An unknown Subversion error occurred. (code = 155037)

Suddenly my Mac Versions app starts to report "An unknown Subversion error occurred. (code = 155037)" when access SVN repository. This error is very generic and useless to help me troubleshoot the root cause.

Google took me to this blog
http://michaelwelburn.com/2013/08/08/error-code-155037-problem-switching-from-svn-1-6-17-to-1-7-8-on-os-x/

But I didn't update svn version or change Versions' settings, so I am thinking of other ways. Finally I figured out svn cleanup then svn update will help resolve this error.

GitLab Commands

After create a new repository on gitlab, it usually gives below command line instructions.

Git global setup
git config --global user.name "Jim Zhao"
git config --global user.email "jim@example.com"

Create a new repository
git clone https://gitlab.com/jimzhao/test.git
cd test
touch README.md
git add README.md
git commit -m "add file"
git push -u origin master

Existing folder
cd existing_folder
git init
git remote add origin https://gitlab.com/jimzhao/test.git
git commit -m "init message"
git push -u origin master

Existing Git repository
cd existing_repo
git remote rename origin old-origin
git remote add origin https://gitlab.com/jimzhao/test.git
git push -u origin --all
git push -u origin --tags