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There is a computer connecting to a VPN. The network should remain offline, if the machine can’t reconnect to the VPN. It should not ever use the normal connection. Only the VPN one. Is there a way to set this behaviour up?The machine is used locally, so there is no need to reach it…
Case:Customers delete an Excel file of almost 1M due to mistakes and urgently need to do data recovery. Solution:Restoring a 1M Excel file, for the XLS form, this file is relatively large!The corresponding SAT table was found through the file header information, and then the end of the file is basically determined through the DCumemt…
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Many students will be packing laptop computers in addition to the usual school supplies. It’s clear that laptop computers are quickly becoming a vital part of the scholastic experience, however with more laptops in use comes more danger for data loss.
Laptop computers are an excellent way for today’s students to manage their workload, but protecting the data on those computers isn’t as simple as securing a notebook in a locker. Students need to be careful with their laptops to avoid both physical damage and other problems that could affect the integrity of their data. If problems do occur, it’s also important they know that data recovery is always an option.
To help students protect against laptop data disasters, there are some tips:
Laptops are not as rugged as many like to think. When laptops are being docked, moved or transported, the greatest of care should be taken to prevent unnecessary shock or impact. Set up your computer in a dry, cool, controlled environment that is clean and dust-free. Placing your computer in a low-traffic area will protect your system and storage media from harmful jarring or bumping.
Use a sturdy, well padded laptop bag – Using just a back-pack or brief-case may not provide the protection a laptop needs during transportation. Make sure your laptop has plenty of built-in padding for protection.
Backup your data regularly – Creating regular backups is one of the most effective ways to protect you from losing data. Back up data at least once a week on a reliable medium (CD, DVD, USB flash drives or Internet backup), always verifying that the correct data is backed up.
Run a virus scan and update it regularly – Computer viruses are one of the worst enemies to your computer. Good anti-virus software tests your system for sequences of code unique to each known computer virus and eliminates the infecting invader. Also beware of spyware, a common problem brought about by Web surfing and downloads that can cause complications with your computer’s efficiency. There are several programs available on the internet that can assist with the removal of most spyware programs.
Be aware of strange noises – If you hear a strange noise or grinding sound, turn off your computer immediately and call an expert. Further operation may damage your hard drive beyond repair.
Do not use file recovery software if you suspect an electrical or mechanical failure – Using file recovery software on a faulty hard drive may destroy what was otherwise recoverable data or worsen the physical failure.
Use Auto-Save features – Most software applications have Auto-Save features that will save the project or document you have open at a preset intervals. For laptop users, a good time interval to use is every 5 minutes.
Be battery-level aware – If you are going to be using the laptop for long hours, be sure to try and find an electrical outlet to plug into. Some laptops will shut down quickly when a specific low battery level is reached and important documents may be lost.
Ecosystem
A cohesive, robust, interconnected whole. The EVault cloud-connected ecosystem is built on a shared technology platform, leveraged in every deployment—software, appliances, software as a service (SaaS), and managed services—that creates a seamlessly integrated, cloud-connected data protection ecosystem.
Edge computing
A topological paradigm in which applications, data, and computing power (services) are pushed away from centralized points to the logical extremes of a network. Edge computing replicates fragments of information across distributed networks of web servers, which may be vast and include many networks. Edge computing is also referred to as mesh computing, peer-to-peer computing, autonomic (self-healing) computing, grid computing, and other names implying non-centralized, nodeless availability.
Emergency power off
Also referred to as an EPO switch, emergency power off (EPO) is a button or switch that shuts down the power in a room or network of electrical circuits. Typically used in data centers with a large number of computers using large amounts of electricity, the EPO is meant to be activated by a human only in emergency situations when it is necessary to cut the power if human life is in jeopardy or if there is the potential for major damage to the building or equipment (for example, in the case of a fire or electrocution). The sudden loss of power will inevitably lead to the loss of some data, and the EPO is not meant to be used under normal circumstances.
Electron-trapping optical memory
A method of erasable optical storage. Information is written, or stored, by a low-power laser tuned to a specific frequency. The laser elevates the energy level of electrons to a trapped state. The data is read by a second laser that returns the elevated electrons to their ground state.
Encryption
The conversion of plaintext to encrypted text with the intent that it only be accessible to authorized users who have the appropriate decryption key.
Enhanced capacity cartridge system
In data storage technology, enhanced capacity cartridge system (ECCST) is a double length tape cartridge with a nominal uncompressed capacity of approximately 800 Mbytes.
Enterprise content management
Enterprise content management (ECM) describes the technologies used by organizations to capture, manage, store, and control enterprise-wide content, including documents, images, e-mail messages, instant messages, video, and more. ECM software is used to assist in content control associated with business processes, and can be used to assure compliance with regulations (such as Sarbanes-Oxley , HIPPA, and others). ECM has emerged from the convergence of many related technologies such as document management, web content management, and collaboration.
Equipment footprint
The physical area that is occupied only by data center equipment. This area does not include aisles between racks or any space left at end of equipment rows.
Enterprise storage
A centralized storage system used by a large business or organization to manage data. Enterprise storage also indicates processes for data sharing and connectivity. Enterprise storage is different from consumer or home computer storage in terms of the size of the storage system, the amount of data handled by the system, the number of users accessing the system, and also the technology used to create the storage system. Enterprise storage systems usually focus on providing the networking and management operations for data storage, backup, disaster recovery, and archiving.
In Information Technology, a backup or the process of backing up refers to making copies of data so that these additional copies may be used to restore the original after a data loss event. The verb form is back up in two words, whereas the noun is backup (often used like an adjective in compound nouns).
–profile
–System wide environment and startup script program.
/dev/MAKEDEV
The /dev/MAKEDEV file is a script written by the system administrator that creates local only device files or links such as device files for a non-standard device driver.
/etc/aliases
Where the user’s name is matched to a nickname for e-mail.
/etc/bootptab
The configuration for the BOOTP server daemon.
/etc/crontab
Lists commands and times to run them for the cron deamon.
/etc/dhcpd.conf
The configuration file for the DHCP server daemon.
/etc/ethers
File for RARP mapping from hardware addresses to IP addresses. See the man page ethers(5).
/etc/exports
The file describing exported filesystems for NFS services.
/etc/fdprm
The floppy disk parameter table. Describes the formats of different floppy disks. Used by setfdprm.
/etc/filesystems
Can be used to set the filesystem probe order when filesystems are mounted with the auto option. The nodev parameter is specified for filesystems that are not really locally mounted systems such as proc, devpts, and nfs systems.
/etc/fstab
Lists the filesystems mounted automatically at startup by the mount -a command (in /etc/rc or equivalent startup file).
/etc/group
Similar to /etc/passwd but for groups rather than users.
/etc/groups
May contain passwords that let a user join a group.
/etc/gshadow
Used to hold the group password and group administrator password information for shadow passwords.
/etc/host.conf
Specifies how host names are resolved.
/etc/hosts
List hosts for name lookup use that are locally required.
/etc/HOSTNAME
Shows the host name of this host. Used for support of older programs since the hostname is stored in the /etc/sysconfig/network file.
/etc/inittab
Configuration file for init, controls startup run levels, determines scripts to start with.
/etc/inetd.conf
Sets up the services that run under the inetd daemon.
/etc/issue
Output by getty before the login prompt. Description or welcoming message.
/etc/issue.net
Output for network logins with LINUX version
/etc/ld.so.conf
Configuration file for ld.so, the run time linker.
/etc/lilo.conf
Configuration file for LILO.
/etc/limits
Limits users resources when a system has shadow passwords installed.
/etc/localtime
In Debian the system time zone is determined by this link.
/etc/login.defs
Sets user login features on systems with shadow passwords.
/etc/logrotate.conf
Configures the logrotate program used for managing logfiles.
/etc/magic
The configuration file for file types. Contains the descriptions of various file formats for the file command.
/etc/motd
The message of the day, automatically output by a successful login.
/etc/mtab
A list of currently mounted file systems. Setup by boot scripts and updated by the mount command.
/etc/named.conf
Used for domain name servers.
/etc/networks
Lists names and addresses of your own and other networks, used by the route command.
/etc/nologin
If this file exists, non-root logins are disabled. Typically it is created when the system is shutting down.
/etc/nsswitch.conf
Name service switch configuration file.
/etc/passwd
The user database with fields giving the username, real name, home directory, encrypted password and other information about each user.
/etc/printcap
A configuration file for printers.
/etc/profile, /etc/cshlogin,/etc/csh/cshrc
Files executed at login or startup time by the Bourne or C shells. These allow the system administrator to set global defaults for all users.
/etc/protocols
Describes DARPA internet protocols available from the TCP/IP subsystem. Maps protocol ID numbers to protocol names.
/etc/rc or /etc/rc.d or /etc/rc?.d
Scripts or directories of scripts to run at startup or when changing run level.
/etc/rc.d/rc0.d
Contains files used to control run level 0. Usually these files are softlink files.
/etc/rc.d/rc1.d
Contains files to control run level 1. Scripts beginning with an S are for start, K for kill.
/etc/rc.d/rc.sysinit
Init runs this when it starts.
/etc/resolv.conf
Configures the name resolver, specifying the address of your name server and your domain name.
/etc/securetty
Identifies secure terminals from which root is allowed to log in.
/etc/services
Lists the network services that the system supports.
/etc/shadow
Shadow password file on systems with shadow password software installed. Shadow passwords move the encrypted password files from /etc/passwd to /etc/shadow which can only be read by root.
/etc/shadow.group
Systems with shadow passwords may have this file.
/etc/shells
Lists trusted shells. The chsh command allows users to change their login shell to shells listed only in this file.
/etc/skel/.profile
Can be used by administrator to set the editor environment variable to some editor that is friendly to new users.
/etc/sudoers
A list of users with special privileges along with the commands they can execute.
/etc/smb.conf
The configuration file for setting up Samba services.
/etc/sysconfig/amd
Used to configure the auto mount daemon.
/etc/sysconfig/clock
Used to configure the system clock to Universal or local time and set some other clock parameters.
/etc/sysconfig/i18n
Controls the system font settings.
/etc/sysconfig/init
This file is used to set some terminal characteristics and environment variables.
/etc/sysconfig/keyboard
Used to configure the keyboard.
/etc/sysconfig/mouse
This file is used to configure the mouse.
/etc/sysconfig/network-scripts/ifcfg-interface
Defines a network interface.
/etc/sysconfig/pcmcia
Used to configure pcmcia network cards.
/etc/sysconfig//routed
Sets up dynamic routing policies.
/etc/sysconfig/static-routes
Configures static routes on a network.
/etc/sysconfig/tape
Used for backup tape device configuration.
/etc/X11/XF86Config
The configuration file for the X server.
/etc/syslog.conf
Configuration file for the syslogd daemon.
/etc/termcap
The terminal capability database. Describes by what “escape sequences” various terminals can be controlled. See terminfo, termcap, curs_termcap man pages.
/etc/terminfo
Details for terminal I/O.
/etc/usertty
This file is used to impose special access restrictions on users.
$HOME/.bashrc
User aliases, path modifier, and functions.
$HOME/.bash_profile
Users environment stuff and startup programs.
$HOME/.bash_logout
User actions to be done at logout.
$HOME/.hushlogin
When this file exists in the user’s home directory, it will prevent check for mail, printing of the last login time, and the message of the day when the user logs in.
$HOME/.inputrc
Contains keybindings and other bits.
$HOME/Xrootenv.0
Has networking and environment info.
/proc/cpuinfo
Information about the processor such as its type, make and performance.
/proc/devices
A list of devices configured into the currently running kernel.
/proc/dma
Shows which DMA channels are being used at the moment.
/proc/filesystems
Filesystems that are configured into the kernel. The file used to detect filesystems if the /etc/filesystems does not exist.
/proc/ioports
Shows which I/O ports are in use at the moment.
/proc/interrupts
Shows which interrupts are in use and how many of each there have been.
/proc/kcore
An image of the physical memory of the system.
/proc/kmsg
Messages output by the kernel. These are also routed to syslog.
/proc/ksyms
Symbol table for the kernel.
/proc/loadavg
The load average of the system.
/proc/meminfo
Information about memory usage, both physical and swap.
/proc/modules
Which kernel modules are currently loaded.
/proc/mounts
Contains information on filesystems currently mounted, similar to /etc/mtab
/proc/net
Contains status information about network protocols.
/proc/self
A symbolic link to the process directory of the program that is looking at /proc. When 2 process look at proc, they get different links.
/proc/stat
Various statistics about the system such as the number of page faults since the system was booted.
/proc/uptime
The time the system has been up.
/proc/version
The kernel version.
/tmp/fvwmrca01339
FVWM-M4 defines. Contains networking, Xwindows, other setup info.
/usr/lib/zoneinfo
Time zone datafiles are stored here on the Debian system
/var/log/lastlog
Used by finger to tell when a user was last logged in.
/var/log/wtmp
Binary info on users that have been logged on. The last command uses this info.
/var/run/utmp
Contains information about users currently logged in. Who and w commands use this file.
/var/named/root.hints
Used for domain name server. Placed here optionally, but this is the normal location.
/var/named/*
Files used by domain name server. Placed here optionally, but this is the normal location.
/var/log/btmp
Used to store information about failed logins. This file must be first created to activate it.
/var/log/lastlog
Contains information about the last time a login was done on the system. Works with lastb(1).
/var/log/maillog
The normal system mail log file.
/var/log/messages
The main system message log file.
var/log/secure
System tracking of user logins. Check this file periodically.
/var/spool/mail
Where mailboxes are usually stored.
Case:Customers use the partition tools that come with Lenovo to restore the partition. After the recovery is completed, the data is found to be lost, and then the partition is adjusted to the same as the original and formatted, and then scanned with the data recovery software. As a result, no data was found. Solution:Since…
Right now, I have all my music on my internal hard drive, but it is running out of space. So, I bought an external hard drive, copied all my music over and went into the advanced preferences in iTunes and changed my music location. However, when I view the iTunes music library XML file in…
For all answers i found about this topic, the solution was to create, in a certain computer A where i need to install the package, a file containing all dependencies it needs and then downloading it in another computer, let’s call it B. The thing is, i want to have a storage of certain critical…
