{"id":171,"date":"2012-01-23T12:33:13","date_gmt":"2012-01-23T17:33:13","guid":{"rendered":"https:\/\/www.vhdesigns.com\/?p=171"},"modified":"2012-01-23T12:33:13","modified_gmt":"2012-01-23T17:33:13","slug":"simple-telnet-automation-using-expect-this-is-a-nice-simple-bash-shell-script-to-automate-and-test-telnet-servers-its-a-nice-script-and-well-commented-hope-you-enjoy-all-comments-welcome","status":"publish","type":"post","link":"https:\/\/vhdesigns.com\/index.php\/2012\/01\/23\/simple-telnet-automation-using-expect-this-is-a-nice-simple-bash-shell-script-to-automate-and-test-telnet-servers-its-a-nice-script-and-well-commented-hope-you-enjoy-all-comments-welcome\/","title":{"rendered":"Simple Telnet Automation Using Expect – This is a nice simple bash shell script to automate and test telnet servers, it’s a nice script and well commented. Hope you enjoy, all comments welcome."},"content":{"rendered":"

Simple Telnet Automation Using Expect – This is a nice simple bash shell script to automate and test telnet servers, it’s a nice script and well commented. Hope you enjoy, all comments welcome.<\/a>.<\/p>\n

 <\/p>\n

\n\n\n\n
Explanation of Code (Bash Shell)<\/strong><\/p>\n

The code works by the user entering an argument, this argument could be either
\n-a, -h, or a server nickname. The -a argument would cause the bash shell to
\nlog in and out of every server located in the autotelrc file, using the usernames
\nand passwords provided. The -h argument would bring up a small help message.
\nThe code written is heavily commented but some parts deserve some explanation
\nas to their rationale.<\/p>\n

\u00a0if [ “z$1” == “z” ]; then
\necho “You didn’t type a valid argument.”<\/div>\n

The z in front of the $1 argument is to tell if the user entered an argument
\nor not. If something isn’t entered it returns just the z by itself and the error
\necho occurs.
\nIf this condition is not true then the script then proceeds to the else statement.
\nUnder this statement is another if statement. This takes account for the -a,
\n-h and server nickname argument. The counter I has been initialised at 2, this
\nsaves us a line of code, if I = 2 then we would have to use another cut to trim
\noff the hashes in the rc file. So just incrementing the counter by 1 helps us
\nhere. If the -h argument is used then the if statement give echoes us the help
\nmessage, which explains the usage to the user. If the -a argument is used, then
\nthe statement then proceeds to work it’s way through the rc file and telnet
\ninto each using the expect script (explained later) and then log out, this is
\nuseful to a network administrator to test various telnet machines. If the user
\nspecifies an argument with a server nickname then the script searches through
\nthe rc file for the relevant line and telnets into it using the expect script.
\nThe code used here was as follows.<\/p>\n

\u00a0If [ $1 == $Nickname ]; then
\n.\/telExpect.exp $Machine $Username $Password
\nFi #finish if statement<\/div>\n

This was chosen instead of using the getops because it is much shorter code,
\nand in searching a small file there is not much performance difference.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/form>\n","protected":false},"excerpt":{"rendered":"

Simple Telnet Automation Using Expect – This is a nice simple bash shell script to automate and test telnet servers, it’s a nice script and<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-171","post","type-post","status-publish","format-standard","hentry","category-tips"],"_links":{"self":[{"href":"https:\/\/vhdesigns.com\/index.php\/wp-json\/wp\/v2\/posts\/171","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vhdesigns.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vhdesigns.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vhdesigns.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vhdesigns.com\/index.php\/wp-json\/wp\/v2\/comments?post=171"}],"version-history":[{"count":0,"href":"https:\/\/vhdesigns.com\/index.php\/wp-json\/wp\/v2\/posts\/171\/revisions"}],"wp:attachment":[{"href":"https:\/\/vhdesigns.com\/index.php\/wp-json\/wp\/v2\/media?parent=171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vhdesigns.com\/index.php\/wp-json\/wp\/v2\/categories?post=171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vhdesigns.com\/index.php\/wp-json\/wp\/v2\/tags?post=171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}