This is easy to fix by creating symbolic link to correct place.
Please find this by locate command :

root@server01 ~]# locate sftp-server
/usr/libexec/openssh/sftp-server


and them make link:

ln -s /usr/libexec/openssh/sftp-server /usr/libexec/sftp-server


this error a got through mysql command line:

mysql> delete from groups where `group_id`=4;
ERROR 1030 (HY000): Got error -1 from storage engine

It is mysql’s error log:

Cannot delete/update rows with cascading foreign key constraints that exceed max depth of 250
If you use 5.1.51- Just update your mysql-server version.
This is bug of mysql-server-5.1.51 – after:
#portupgrade mysql-server

problem disappeared.

#cd /usr/ports/www/redmine
===> redmine-1.2.1_1 is marked as broken: Does not work with RubyGems 1.8.
*** Error code 1

Stop in /usr/ports/www/redmine.

Sure. You wouldn’t read this post if process had been done successfully
Maintainer of this port marked this port as broken because of bug in Gem 1.8.

As result we have to install it manually. Hopefully we have official installation guide.

I came across with some problems during installation. So, this post will be a guide adapted for FreeBSD with some errors and solutions.
Hope it will be useful. It seems as long process, but really easy. Let’s start.

1) Get Redmine (I used svn for it):

#svn co http://redmine.rubyforge.org/svn/branches/1.2-stable redmine-1.2

2) Create database:
mysql -uuser -ppasword
mysql> create database redmine character set utf8;
mysql> create user 'redmine'@'localhost' identified by 'passforuser';
mysql> grant all privileges on redmine.* to 'redmine'@'localhost';
mysql>exit;

3) Database configuration (copy from config/database.yml.example). config/database.yml:
production:
adapter: mysql
database: redmine
host: localhost
username: redmine
password: passforuser

4)Generate a session store secret.
#rake generate_session_store
Missing the i18n 0.4.2 gem. Please `gem install -v=0.4.2 i18n`

At this place started problems. Don’t worry. Just do thing redmine suggests.

#gem install -v=0.4.2 i18n
Fetching: i18n-0.4.2.gem (100%)
Successfully installed i18n-0.4.2
1 gem installed
Installing ri documentation for i18n-0.4.2...
Installing RDoc documentation for i18n-0.4.2...

trying again:

#rake generate_session_store
Missing the Rails 2.3.11 gem. Please `gem install -v=2.3.11 rails`, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.

I tried update RAILS_GEM_VERSION (on 3.0.5) but Redmine doesn’t work with 3.0.5 yet, so:

# gem install -v=2.3.11 rails

then again:
# rake generate_session_store
rake/rdoctask is deprecated. Use rdoc/task instead (in RDoc 2.4.2+)
WARNING: 'task :t, arg, :needs => [deps]' is deprecated. Please use 'task :t, [args] => [deps]' instead.
at /vol1/www/www.slim/httdocs/redmine/redmine-1.2/lib/tasks/email.rake:170

Googled the problem and found out it connected with rake version (need to downgrade):

# gem install -v=0.8.7 rake
Fetching: rake-0.8.7.gem (100%)
Successfully installed rake-0.8.7
1 gem installed
Installing ri documentation for rake-0.8.7...
Installing RDoc documentation for rake-0.8.7...

# gem uninstall -v=0.9.2 rake
Successfully uninstalled rake-0.9.2

finally it done:
# rake generate_session_store
(in /vol1/www/www.slim/httdocs/redmine/redmine-1.2)

5) Database migration:
# rake db:migrate RAILS_ENV=production
(in /vol1/www/www.slim/httdocs/redmine/redmine-1.2)
rake aborted!
syntax error on line 8, col 2: ` encoding: utf8'

(See full trace by running task with --trace)

Problem was – I missed space in config/database.yml before the password.

# rake db:migrate RAILS_ENV=production
(in /vol1/www/www.slim/httdocs/redmine/redmine-1.2)
!!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql.
rake aborted!
no such file to load -- mysql

installing gem mysql:
howtobsd# gem install mysql

and then:
howtobsd# rake db:migrate RAILS_ENV=production

db migration done!

6) Load default data (recommended):
# rake redmine:load_default_data RAILS_ENV=production
(in /vol1/www/www.slim/httdocs/redmine/redmine-1.2)

Select language: bg, bs, ca, cs, da, de, el, en, en-GB, es, eu, fa, fi, fr, gl, he, hr, hu, id, it, ja, ko, lt, lv, mk, mn, nl, no, pl, pt, pt-BR, ro, ru, sk, sl, sr, sr-YU, sv, th, tr, uk, vi, zh, zh-TW [en]

Choose language and moving ahead.

7)According to manual set permissions (create required folders if it doesn’t exist):

chown -R username:username files log tmp public/plugin_assets
chmod -R 755 files log tmp public/plugin_assets

8) Test installation:
#ruby script/server webrick -e production
=> Booting WEBrick
=> Rails 2.3.11 application starting on http://0.0.0.0:3000

now you can enter in your browser http://localhost:3000

* login: admin
* password: admin

Great! It is works!

9) We only need to configure Apache for redmine.
It is described in my article “Installing Ruby on Rails on FreeBSD” with differences in httpd.conf for new versions.
Now for me it:
LoadModule passenger_module /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/ext/apache2/mod_passenger.so
PassengerRoot /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5
PassengerRuby /usr/local/bin/ruby18

10)My example of virtual host for redmine:
<VirtualHost *:80>
ServerName my-projects.com
DocumentRoot /vol1/www/www.slim/httdocs/redmine/redmine-1.2/public/
RailsEnv production
ErrorLog /vol1/www/www.slim/httdocs/redmine/redmine-1.2/log/httpd.log
</VirtualHost>

That’s all!

make next command to find out name of partition of our device (I hope you will try to mount in exist directory ):
howtobsd#mount /dev/da0 /mnt/flash
mount: /dev/da0 : Invalid argument

Ignore this message and looking at /dev directory – there should appear new device:
howtobsd#ls -l /dev/da*
crw-r----- 1 root operator 0, 143 16 окт 17:57 /dev/da0
crw-r----- 1 root operator 0, 144 16 окт 18:29 /dev/da0s1

And now we are ready to mount it:

mount_msdosfs /dev/da0s1 /mnt/flash/

Done.

Firstly we need to make virtual device for our iso image (use mdconfig for it):
howtobsd# mdconfig -a -f /path_to_iso/Mac_OS_X.iso
md0

md0 (command return) – it is name of virtual device (should appear in /dev/md0).
you can check if it appeared in /dev:
howtobsd# ls /dev/ | grep md0
md0

And now we just need to mount virtual device:

howtobsd# mount_cd9660 /dev/md0 /cdrom

That’s all, your iso image available in /cdrom directory.

If you need to unmount and delete virtual device, do following commands:
howtobsd# umount /cdrom
mdconfig -d -u md0

Solution is: delete ifrom the home directory file ~/.viminfo:

rm ~/.viminfo

Do not worry – it is just file of history and can be deleted.

Batch converting files from folder:

#mkdir new; for a in $(find . -name "*.php"); do iconv -f KOI8-R -t utf-8 <"$a" >new/"$a" ; done

It will make “new” directory with converted files.

Create dump of mysql base:

# mysqldump -uDBUSER -pPASSWORD DBNAME > filename.sql

or
# mysqldump --user=username --password=password DBNAME > filename.sql

if you need to make dump of a few databases you can use parametr -B (or –databases):

mysqldump -uDBUSER -pPASSWORD -B DBNAME1 DBNAME2 > filename.sql

Make dump of the all Databases on host:
mysqldump -uDBUSER -pPASSWORD -A > filename.sql

If you need only dump structure of database (without data):

mysqldump -uDBUSER -pPASSWORD --no-data DBNAME > filename.sql

If you want to make limited by records mysqldump, next command especially for you (It was really cool command when I need dump and then move test copy of project with enormous mysql database):

mysqldump -uDBUSER -pPASSWORD --where="true limit 100" DBNAME > filename.sql

this command will dump your database with defined amount records in each table.

Perl: Premature end of script headers

A long time I have tried to fix it by sending headers like:

print "Content-type: text/plain\n\n"; но безуспешно.

The problem was just in DOS newline format. Just need change format from DOS/WIN (CR/LF) to Unix (LF).

I hope it will help somebody else.

after that it updated.