{"id":1480,"date":"2011-08-21T22:00:59","date_gmt":"2011-08-21T21:00:59","guid":{"rendered":"http:\/\/www.haydnwilliams.com\/blog\/?p=1480"},"modified":"2022-04-11T21:34:01","modified_gmt":"2022-04-11T20:34:01","slug":"uhs6-ssh-subversion-svn","status":"publish","type":"post","link":"https:\/\/www.haydnwilliams.com\/blog\/uhs6-ssh-subversion-svn\/","title":{"rendered":"UHS6 – SSH & Subversion (SVN)"},"content":{"rendered":"

SSH<\/strong><\/span><\/h2>\n

SSH<\/a> lets you remotely access your computer, or other computers, using a command-line interface. Installing SSH really is a breeze:<\/p>\n

sudo apt-get install ssh<\/pre>\n
It was so quick and easy I even had to check it had actually been done!<\/p>\n
>which ssh<\/pre>\n
The binary did exist and I was able to log into the machine without any problems. Almost too simple! You’ll probably want to increase the security of your setup a bit by using hosts.allow<\/strong> and hosts.deny<\/strong> files. These live in \/etc<\/strong> and consist of rules that determine which hosts should be allowed to connect to certain services on your machine. My hosts.deny<\/strong> has the following:<\/p>\n
ALL: ALL<\/pre>\n
and my hosts.allow<\/strong> has this:<\/p>\n
127.0.0.1\r\nSSHD: 192.168.1.23<\/pre>\n
This results in all connections from all IP addresses being denied, except for SSH from one specific machine on the local network. Note that the hosts.*<\/strong> files will only work on services started as daemons, not standalone, and these services must support TCP Wrappers<\/a> (which are what make hosts.*<\/strong> work). This page<\/a>, and another,<\/a> revealed the following command to determine whether a particular daemon has support for TCP Wrappers; it basically checks whether the daemon depends on the relevant library, libwrap.so.0<\/strong>:<\/p>\n
ldd \/usr\/sbin\/smbd | grep wrap<\/pre>\n
Running the above command doesn’t give any result, so smbd<\/strong> – the Samba server daemon – isn’t affected by hosts.*<\/strong> (see my other post for rudimentary details on securing Samba). There are plenty of pages which delve<\/a> into more detail<\/a> about more complex rules for hosts.*<\/strong>, or you could just:<\/p>\n
man hosts.allow\r\nman hosts.deny<\/pre>\n
 <\/p>\n
Subversion<\/span><\/strong><\/h2>\n
Subversion<\/a> (SVN) was no more difficult:<\/p>\n
sudo apt-get install subversion subversion-tools<\/code><\/p>\n
The first chance I got to test SVN as a client was when installing WordPress, which is covered in a different post. To test the server side of things, I just created a repository:<\/p>\n
sudo svnadmin create \/var\/svn<\/pre>\n
Everything went swimmingly, so further setup will take place at a later date. There are a number<\/a> of good<\/a> guides<\/a> online<\/a> that will take you further with Subversion, which is beyond the scope of this post.<\/p>\n","protected":false},"excerpt":{"rendered":"
SSH SSH lets you remotely access your computer, or other...<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[680,681,682,640,515,510,323,326,662,679,604,661],"class_list":["post-1480","post","type-post","status-publish","format-standard","hentry","category-it","tag-hosts","tag-hosts-allow","tag-hosts-deny","tag-repository","tag-secure-shell","tag-ssh","tag-subversion","tag-svn","tag-svnssh","tag-tcp-wrappers","tag-ubuntu","tag-version-control"],"_links":{"self":[{"href":"https:\/\/www.haydnwilliams.com\/blog\/wp-json\/wp\/v2\/posts\/1480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.haydnwilliams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.haydnwilliams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.haydnwilliams.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.haydnwilliams.com\/blog\/wp-json\/wp\/v2\/comments?post=1480"}],"version-history":[{"count":0,"href":"https:\/\/www.haydnwilliams.com\/blog\/wp-json\/wp\/v2\/posts\/1480\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.haydnwilliams.com\/blog\/wp-json\/wp\/v2\/media?parent=1480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.haydnwilliams.com\/blog\/wp-json\/wp\/v2\/categories?post=1480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.haydnwilliams.com\/blog\/wp-json\/wp\/v2\/tags?post=1480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}