When in command mode, press the u key to undo the last change to a file. Press U to undo last change(s) on a line. To open a file at a certain line, start it like this: vim +567 file.txt. This will open the file file.txt on line 567. Using the VIM editor for Linux … Read more
The shuf command for Linux allows a command-line user to select a given number of random words from a wordlist. [jason@localhost ~]$ shuf -n 8 /usr/share/dict/words amphivasal thoracically U. bluet Dabih thioamid taxiing convictism[jason@localhost ~]$ shuf -n 8 /usr/share/dict/words amphivasal thoracically U. bluet Dabih thioamid taxiing convictism This can be used to generate a word … Read more
The latest Paris terrorist attacks are the impetus for more discussion about encryption. It is claimed that the terrorists used services such as TOR or a VPN to hide their traffic on the Internet when discussing their plans before the attacks. This will of course lead to more plans to tighten Internet monitoring and restricting … Read more
There is a new Linux ransomware in the wild that is targeting machines by encrypting the home directories and locking users out of their files until they visit a deep web site and pay a ransom. This is why you should have regular backups of your files in case your Linux directories are encrypted. the … Read more
To install NTP on Linux and update the system time automatically from the Internet, firstly install the NTP client. jason@darkstar:~$ sudo apt-get install ntpjason@darkstar:~$ sudo apt-get install ntp Then install the ntpdate utility. sudo apt-get install ntpdatesudo apt-get install ntpdate Then you may synchronize the time on your machine with the Internet time server. jason@darkstar:~$ … Read more
There are a few commands available in Red Hat Linux to get information about your network adapter. Here are a couple. The ifstat command returns information about the network throughput of your adapter. [jason@darknet ~]$ ifstat #kernel Interface RX Pkts/Rate TX Pkts/Rate RX Data/Rate TX Data/Rate RX Errs/Drop TX Errs/Drop RX Over/Rate TX Coll/Rate lo … Read more
To open the Firefox developer tools, press Ctrl-Shift-K. This is good if you have Firebug installed, as F12 will open it instead. To take a full-page screenshot of a web site, press Shift-F2 and then type this command and hit press ENTER. screenshot –fullpagescreenshot –fullpage This will be saved in the ~/Downloads folder by default. … Read more
To display post excerpts in WordPress, put this code in the index.php <?php if(is_single() || is_page()) { ?> <?php the_content(__('(more…)’)); ?> <?php } else { ?> <?php the_excerpt(__('(more…)’)); ?> <? } ?><?php if(is_single() || is_page()) { ?> <?php the_content(__(‘(more…)’)); ?> <?php } else { ?> <?php the_excerpt(__(‘(more…)’)); ?> <? } ?> This will display full … Read more
To set an IP address on a VLAN on a Cisco switch, firstly access the configuration section for the VLAN in configuration mode. arya(config)#interface vlan 1arya(config)#interface vlan 1 Then the administrator may set an IP address for the VLAN. arya(config-if)#ip address 172.18.31.210 255.255.255.0arya(config-if)#ip address 172.18.31.210 255.255.255.0 Then you are all set. To save the running … Read more
Getting the Prolific USB serial adapter working with Windows 8 can be difficult. Especially if you are studying for CCNA and you need to access a 2960G switch on Windows with Putty. As strange as it may look, you need an outdated driver to make it work. The only working version I have found is … Read more