Mark Sanborn Mark Sanborn Fishing Mark Sanborn

Coder, Entrepreneur, Blogger, and Coffee Addict

Category Archives: Linux

← Older posts Newer posts →

Numbering Each Line in a Text File

Sometimes we are given an error message that references a line number in a text file. We can number each line so we can find the error message right a way. In fact, we can print out the exact line … Continue reading

Posted in FreeBSD, Linux | Comments Off

Securely Wipe a File with DD

Sometimes we have sensitive data that we want to get rid of. Since deleting a file doesn’t actually prevent it from being recovered we need to do some extra steps to ensure that it can’t be recovered. In this post … Continue reading

Posted in FreeBSD, Linux, Security | 3 Comments

Use Rsync for Daily, Weekly and Full Monthly Backups

Today, we will be using rsync to make daily, weekly, incremental backups and then a full compressed/archived backup once a month. We will then use cron to automate the process. Lets face it us humans get lazy sometimes and most … Continue reading

Posted in FreeBSD, Howto, Linux | 14 Comments

Make a Backup Image of your Hard Drive with DD

Dd is a tool that is often used in computer forensics because it is extremly low level and effecient at creating exact duplicates of hard drives. For this reason it is often the tool for which all other tools are … Continue reading

Posted in FreeBSD, Howto, Linux | 1 Comment

Protecting Linux from Fork Bombs

Fork bombs are basically a never ending loop. They open a processes that opens other processes that open even more processes exponentially. Causing any computer to lock up within a matter of seconds. Although they have to be ran from … Continue reading

Posted in FreeBSD, Linux | Comments Off

Add Port Knocking to SSH for Extra Security

SSH by default is very strong. It has protection against various hacks and known vulnerabilities. For instance SSH has a password retry wait time of five seconds. This makes the time for brute force attacking an SSH server very long … Continue reading

Posted in FreeBSD, Linux | 2 Comments

Changing Permissions with chmod Binary Values

Recently I accidently changed the permissions of one of my files and I didn’t know what the correct permissions were suppose to be. I did know that the other files in the same directory were the correct permission. Using the … Continue reading

Posted in FreeBSD, Linux | Comments Off

Learning Cron by Example

If you are using a Linux system and want to schedule a task to run in the future you will probably need to know cron. Cron is much like Window’s Scheduled Tasks. The only difference is that cron is conifgured … Continue reading

Posted in FreeBSD, Linux | 6 Comments
← Older posts Newer posts →

© 2011 All rights reserved

1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31|32|33|34|35|36|37|38|39|40|41|42|43|44|45|46|47|48|49|50|51|52|53|54|55|56|57|58|59|60|61|62|63|64|65|66|67|68|69|70|71|72|73|74|75|76|77|78|79|80|81|82|83|84|85|86|87|88|89|90|91|92|93|94|95|96|97|98|99|100|101|102|103|104|105|106|107|108|109|110|111|112|113|114|115|116|117|118|119|120|121|122|123|124|125|126|127|128|129|130|131|132|133|134|135|136|137|138|139|140|141|142|143|144|145|146|147|148|149|150|151|152|153|154|155|156|157|158|159|160|161|162|163|164|165|166|167|168|169|170|171|172|173|174|175|176|177|178|179|180|181|182|183|184|185|186|187|188|189|190|191|192|193|194|195|196|197|198|199|200|201|202|203|204|205|206|207|208|209|210|211|212|213|214|215|216| generic buying erythromycin alesse next day delivery without a prescription motilium no prescription needed buy cytotec pills canadian pharmacy no prescription needed provera actos by internet buying orlistat pharmacy without prescription lisinopril no prescription needed purchase femara medication buy lipitor cod actonel buy online cheap buy carbozyne online without prescription femara prescription discounts elavil without prescriptions pills buying isotretinoin online pharmacy trazodone no prescription order no prescription metformin birth control no prescriptionAccutane Online Doxycycline online Buy Cheap Lexapro Online No Prescription Prednisone Online Buy Accutane No Prescription