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SSH Access to Server
SSH is a secure form of Telnet connection, using an RSA key. It is a more powerful means of access than FTP, as it provides a command line interface for running scripts, etc.
At the same time, SSH allows more possibilities for error, and actions which may cause harm to the server. Therefore, SSH access is a privilege to an account. It can be revoked at any time if user ‟s activities appear detrimental to the health of the server.
In this chapter:
Accessing Your SSH Account ........................................................................... 60
Running Shell Scripts With Crontab................................................................... 61
Accessing Your SSH Account
To request shell access to the server:
1 Select
FTP User in the FTP menu.
2 Enable
Shell Access and administrator will receive the request on his control panel.
3 Agree with charges, if any.
4 Click the
Request Status link that appeared to learn if your request has been processed by administrator. Depending on the request status, the
Request status will show up as not reviewed by administrator or granted by administrator.
5 If shell access is granted by administrator, it turns O N and opens you access to the server.
Important: Parallels H-Sphere 3.1+ users with SSH access enabled will be automatically limited to their home directory. This is done for security reasons, in order to restrict users from running certain commands and accessing system directories.
However, users will still be able to create, copy, move, rename and delete files and directories and run a variety of utilities and file managers:
Utilities: cat, echo, ln, mkdir, ps, rm, sh, cp, date, kill, ls, mv, pwd, rmdir, sleep, md5/md5sum, ping, awk, diff, find, id, sed, tar, whereis, basename, dirname, grep, ldd, sort, touch, which, cut, du, head, more, tail, vi, whoami, clear.
File managers: mc, ytree, vifm, deco.
SSH Access to Server 61
Running Shell Scripts With Crontab
Crontab allows you to clock and run your own Unix shell scripts automatically. It is available only in Unix-based plans and requires the knowledge of Unix shell commands.
To enable crontab jobs:
1 Select
FTP User in the FTP menu.
2 Enable
Crontab.
3 Agree with charges, if any.
4 Click the
Edit icon for Crontab.
5 On the page that appears, add the crontab job.
Commands are executed by cron when the minute, hour, day and month fields match the current time, and when at least one of the two day fields (day of month, or day of week) match the current time. If you want to set any minute,
hour, day, enter * symbol.
In the Command box write a command to be executed by cron, i.e. path relative to your root home directory.
The Mail-To address is where the system will direct reports if errors occur.
To delete a job, check the box in the Delete section and click Submit Query.
