Best of Technical Support
inetd on my system, Slackware 2.0.28, stops on occasion, barring access from telnet. Is there an easy way to automatically restart inetd if it dies?
—Mark Johnson, Mark.Johnson@InfoHarvest.ca
You're running an extremely old version of inetd, and some versions did have stability problems. Several solutions to your problem are available. If it is possible to upgrade your system, newer versions usually work fine, and you'll receive other benefits as well. If you'd like a replacement, try such alternatives as xinetd or daemontools, both of which are quite stable and add some features to the mix. However, if your cron service is trustworthy and you don't need to restart the service the second it dies, you might try running the following script every five minutes or so from cron:
#!/bin/sh ISINETS=`ps ax | grep inetd | grep -v grep | wc -l` if [ $ISINETD != 1 ]; then /usr/sbin/inetd fi
—Chad Robinson, firstname.lastname@example.org
We've said this before, but please replace telnet with OpenSSH to avoid exposing your passwords and other sensitive data to the network. Packages for the OpenSSH client and server are available for all the Linux distributions, and compatible clients are available for every common platform. SSH is as easy to use as telnet, and it automatically encrypts your connection.
—Don Marti, email@example.com
I'm operating SuSE 8.0 on my IBM ThinkPad 600E and am trying to connect to our LAN server at work. How do I configure TCP/IP so it automatically recognizes the addresses?
Run YaST2, the SuSE setup tool, and go to the Network address setup screen. Select Automatic address setup (via DHCP) to use a DHCP server if one is available, or select Static address setup and fill in an IP address and subnet mask to set the address manually.
—Don Marti firstname.lastname@example.org
Fast/Flexible Linux OS Recovery
On Demand Now
In this live one-hour webinar, learn how to enhance your existing backup strategies for complete disaster recovery preparedness using Storix System Backup Administrator (SBAdmin), a highly flexible full-system recovery solution for UNIX and Linux systems.
Join Linux Journal's Shawn Powers and David Huffman, President/CEO, Storix, Inc.
Free to Linux Journal readers.Register Now!
- The Qt Company's Qt Start-Up
- Devuan Beta Release
- May 2016 Issue of Linux Journal
- EnterpriseDB's EDB Postgres Advanced Server and EDB Postgres Enterprise Manager
- The US Government and Open-Source Software
- Open-Source Project Secretly Funded by CIA
- The Death of RoboVM
- The Humble Hacker?
- BitTorrent Inc.'s Sync
- New Container Image Standard Promises More Portable Apps
In modern computer systems, privacy and security are mandatory. However, connections from the outside over public networks automatically imply risks. One easily available solution to avoid eavesdroppers’ attempts is SSH. But, its wide adoption during the past 21 years has made it a target for attackers, so hardening your system properly is a must.
Additionally, in highly regulated markets, you must comply with specific operational requirements, proving that you conform to standards and even that you have included new mandatory authentication methods, such as two-factor authentication. In this ebook, I discuss SSH and how to configure and manage it to guarantee that your network is safe, your data is secure and that you comply with relevant regulations.Get the Guide