Subversion Command

Checkout:
svn co URL[@REV]... [PATH]

Commit:
svn ci [PATH]
  --depth ARG : limit operation by depth ARG ('empty', 'files',
                        'immediates', or 'infinity')

Log:
svn log [PATH][@REV]
            URL[@REV] [PATH...]
  -r ARG1[:ARG2] :
    NUMBER: revision number
    {DATE}: revision at start of the date, ex: {2015-01-01}
    HEAD: latest in repository
    BASE: base rev of item's working copy
    COMMITTED: last commit at or before BASE
    PREV: revision just before COMMITTED

Difference:
svn diff [-r ARG1[:ARG2]]

Merge:
Roll back to the old version:
$ svn up
$ svn merge -rHEAD:{NUMBER} [PATH]
$ svn ci

Edit Property:
svn pe svn:externals .

Note: svn recognizes the following special versioned properties
  svn:ignore - A newline separated list of file glob patterns to ignore.
  svn:keywords - Keywords to be expanded.
  svn:executable - If present, make the file executable.
  svn:eol-style - One of 'native', 'LF', 'CR', 'CRLF'.
  svn:mime-type - The mimetype of the file.
  svn:externals - A newline separated list of module specifiers, each of which consists of a URL and a relative directory path.
  svn:needs-lock - If present, indicates that the file should be locked before it is modified.