12
votes
3answers
481 views

How to check whether file1 is a prefix of file2?

I have two files with sizes 124665 and 124858 in bytes and want to check whether file1 is a prefix of file2 or not.
21
votes
2answers
88k views

How to find out if httpd is running or not via command line?

I'm working on a small control panel for my server. I need a command that will say if httpd is running or stopped. Will probably be using the same code for other services as well.
3
votes
1answer
75 views

comparing column values between two Unix files

File A Table SAPSR3./1BEA/BBEA_BDH has no BasicFile LOB columns Table SAPSR3./1BEA/BBEA_BDI has no BasicFile LOB columns Table SAPSR3./1BEA/BBEA_DLI has no BasicFile LOB columns Table SAPSR3./1BEA/...
6
votes
2answers
15k views

Add VPN button is disabled in Debian Wheezy/LXDE

I want to configure a VPN connection, so choose VPN Connections->Configure VPN..., and I get to the Network Connections dialog. But the Add button is disabled. How do I enable it?
5
votes
1answer
637 views

What is the difference between @ and * when referencing bash array values?

This Bash guide says: If the index number is @ or *, all members of an array are referenced. When I do this: LIST=(1 2 3) for i in "${LIST[@]}"; do echo "example.$i " done Gives: example.1 ...
1
vote
0answers
6k views

ssmtp: Cannot open mail:25

I've installed ssmtp and then edited the ssmtp.conf file so could try sending a mail but says cannot open mail:25 however in the conf file I set it to gmail port 467 and I am pretty sure everything ...
4
votes
3answers
475 views

How to return either “on” or “off” for: chkconfig --list | grep httpd

To ensure httpd is automatically started on reboot. I simply run this command chkconfig httpd on what I am looking for is a way to be told if this setting is on or off instead of this command ...
-4
votes
1answer
143 views

what does `-t` option of named command stands for?

What does -t option of named stands for? It looks like -d is already taken by debug-level, but where is the t come from? Is it from chrooT?
7
votes
2answers
8k views

Is there a command line method by which I can check whether a downloaded file is complete or broken?

I'm writing a script that involves downloading and manipulating a file, and I want to ensure that the file is not incomplete (due to e.g. a dropped connection) before I work on it.
2
votes
2answers
34k views

Wireless connection not figuring in VMware Workstation 10(Kali-Linux)

I just installed kali-linux on my VMware workstation 10. I had to check for the wireless connection in the kali-linux. I tried to check for the wireless-network connection(WiFi);but,it was incorrectly ...
2
votes
0answers
60 views

Applications for handling appointment wishes

This is not a "What is best" but a "Is there any at all (and which)?" question. A friend of mine wants to improve the handling of her customers' appointment wishes. The idea is that they can enter ...
2
votes
1answer
745 views

ability to view browser view for html file from vim

Is there a plugin / program / key binding that will let me preview html files that I am editing in vim in a browser? Background: I have abandoned traditional full-feature editors and IDE's (of which ...
0
votes
1answer
188 views

Moved folder into other has now disappeared

I had two folders in the same directory and I wanted to move one into other with the command mv foo /foo2. But now foo has vanished.
4
votes
3answers
6k views

Running Cinnamon/X from command line ---> No sound, software rendering

I am booting directly into the terminal of Linux Mint 17. Now I would like from there to start cinnamon gui. I do that with "startx". However, by doing that I do not have any sound (just "Dummy Output"...
11
votes
1answer
1k views

what's the difference between “java” located inside jdk/bin/ and jdk/jre/bin

After downloading the Oracle JDK and unzipping it, I can see that there exists two "java" executables in two different directories. Which one should be used as primary basis. Or, both are the same in ...
12
votes
1answer
8k views

How do you implement layout with the autostarting of applications in the i3 window manager?

This is a follow-up on a prior question on how to autostart applications on individual workspaces with the i3 window manager and what can and can't be done inside the ~/.i3/config configuration file. ...
3
votes
0answers
133 views

Standard workflow to digitize magazines or books using OCR while minimizing file size?

To scan books containing just text, black&white images and clear borders, the workflow I've been using is: digitize the source using a camera or just a scanner use scantailor finally use ...
1
vote
0answers
86 views

Converting RAID partitions to LVM

I have a 3TB HDD. of type RAID 5. I want to convert it to LVM. How can I do this without data loss and without needing for installing the OS again? $ df -h Filesystem Size Used Avail Use% ...
1
vote
1answer
36 views

console (driver) not opening using any of the editor

In my initramfs, I have; [root@xilinx Peta_Microzed_15_05]# ls initramfs/dev/ console [root@xilinx Peta_Microzed_15_05]# nano initramfs/dev/console [root@xilinx Peta_Microzed_15_05]# The above ...
1
vote
1answer
162 views

Does asynchronous disk IO affect swap usage?

I have a server application requiring usage of huge memory but can take little time. I therefore thought it should be economical to run it with a big swap and normal ram. I was reading about serving ...
1
vote
2answers
142 views

`dd` to specific location [closed]

dd is a great tool for copying and conversion. Is there any way by dd (or by any other way), to dump the first few bytes from a file to an unmounted partition? Something like this: dd if=hda2.pbr ...
2
votes
1answer
8k views

kill pid is not working? [duplicate]

This is pretty weird now. I am trying to kill a process by using its pid but it is not working at all. root@machineA:/home/david# ps aux | grep modelling david 5075 0.0 0.0 1285420 29404 ? ...
1
vote
1answer
242 views

Mounting an RAID0 EBS array on EC2

I had a RAID 0 on two EBS volumes running fine on EC2 until the instance was stopped, a snapshot of the EBS volumes created and then restarted again. Now when I go to mount the RAID array I can't seem ...
0
votes
0answers
25 views

Failed packages list

I am planning to write a script to get the list of upgrades available on Ubuntu server and upgrade them. I can get the list of upgrades with "apt-get -s upgrade". But how to get a report on list of ...
0
votes
0answers
148 views

Deleting ssl.conf a problem in apache set up?

In a desperate attempt to stop warnings from a free ssl cert I set up a while back and not knowing how to undo it I ended up deleting my ssl.conf file in the etc/ssl folder but now I am wondering if ...
4
votes
3answers
3k views

Force fsck at boot time on the root file system (prior to mounting file systems, without Single-User mode)

I just wonder if there are any solutions available at all (Googled for 2 hours). How to automatically force fsck disks after crash in `systemd`? - does not mean anything. Setting fsck_y_enable="YES" ...
2
votes
1answer
62 views

skipping copying contents of sub directories using rsync

rsync -avzm -e ssh /path/to/src/folder/ /path/to/dest/folder --include=*/ --include=*/config.xml --exclude=* I need to copy files(say config.xml) that are in the 2nd level directories using rsync. ...
4
votes
1answer
917 views

X and xdotool in LXC instead of KVM

So far I am using various xautomation/xdotool scripts in a KVM virtual machine (linux guest) in order to let them do their work and let me work uninterruptedly. I am using a VirtIO disk, but still the ...
1
vote
1answer
661 views

How do you route to secondary interface on the same physical port?

INTERNET<->(wan)BRIDGED_DEVICE(lan)<->ETH_ROUTER<->LAN Problem: Need to access web server on BRIDGED_DEVICE's LAN from INTERNET via ROUTER (BRIDGED_DEVICE web server cannot be accessed form ...
2
votes
1answer
73 views

How are files opened in unix?

What's the internal process of opening a file? To open a file, the system converts the pathname to inode and from the inode search the corresponding driver disk portion to look for the content of the ...
3
votes
0answers
2k views

Linux - Only first virtual interface can ping external gateway

I created 3 virtual interfaces with different MAC addresses all linked to the same physical interface. I see that they can successfully arp for the gateway (gw) and they can ping (the request is ...
0
votes
1answer
5k views

Fedora 20 boots in emergency mode

After reformatting a disk that I think had nothing to do with the Fedora installation, it now boots always in emergency mode, no matter what "Fedora" option I choose in the bootloader My disk ...
0
votes
1answer
60 views

How can I make my command more susceptible to system slowdowns so as to use it as a visual QoS widget on my desktop?

I had some system slowdown event1 after mistakenly using a command so I thought I could use a desktop "widget" to visually show quality of service or at least show when QoS was degraded and get some ...
9
votes
5answers
7k views

I am using `&`: why isn't the process running in the background?

I know that I can append & to a command to run the process in the background. I'm SSH'ing into an Ubuntu 12.04 box and running a python program with $python program.py & -- but when I go to ...
4
votes
5answers
509 views

Replace new line + 4x space to new line in stdout

I need join 2 lines into one in stdout - replace new line AND 4x space with one space but new line without space don't touch tcpdump -vvv ... -l | xyz this is output: 2014-06-06 AAA BBB 2014-...
4
votes
1answer
72 views

Issue installing OpenVPN via apt

Pastebin I wanted to install OpenVPN on my Debian Wheezy server at home, so I could create a tunnel with my phone or tablet from outside my home. We use OpenVPN at work, so I figured it would be easy ...
1
vote
1answer
406 views

Switch Maven version after installing from jpackage?

I've installed maven3 on CentOS from the JPackage repository. Problem is my installs also seem to have pulled in maven2 which is the default. Is there any way to switch /usr/bin/mvn to be maven3? ...
4
votes
3answers
318 views

How do I combine the -v and -B switches in grep?

I have a list of currently installed kernels, and I'm trying to grep out both the currently installed kernel and the previously installed kernel. For this example, linux-image-3.2.0-60-generic is the ...
2
votes
2answers
4k views

How do I determine which configuration options an rpm package is built with?

This is my first question and I'm still pretty new so please forgive me if I've missed or botched something, or if this is an obvious solution. I'm using CentOS 5.8 (yes I know it's ancient) and ...
4
votes
3answers
3k views

Is maximum individual file size in ext3 imposed on mysql tables?

I am reading about the file systems in Linux from here. This particular sentence kind of confuses me. For ext3, Maximum individual file size can be from 16 GB to 2 TB. Overall ext3 file ...
2
votes
2answers
146 views

How can I capture a consistent snapshot of a directory and all its children?

We have an application that periodically backs itself up to a directory on the local file system. Inside this directory are several more files and directories. I want to produce a "snapshot" of all ...
1
vote
1answer
1k views

phpmyadmin doesn't work after installing php5-mysqlnd

I am currently running into some problems with phpMyAdmin. I set everything up correctly and made sure everything worked. Then later after some developing on some pages I noticed I couldn't execute ...
2
votes
1answer
179 views

why 2TB external HDD is recognized as 800 GB only in Ubuntu 8.10

I had a 2 TB external HDD which I formatted as below. fdisk /dev/sdb After issuing the above command, I did the following steps. Then selected option p. (To print the partition table). Then ...
7
votes
1answer
244 views

/usr/bin/random using a lot of CPU

Using QNX 6.4.1, there is a command called pidin times that shows information about processes. I think it means PID INformation. Among other things, you can see how much CPU a process has used since ...
1
vote
1answer
378 views

How to redirect logs to a fifo device?

I have the following line in the rsyslog config file: *.*;auth,daemon,kern,user -/dev/logi and it does what it should, but I wanted to send some iptables logs to a different file, so I added the ...
4
votes
2answers
4k views

Cannot Start KVM VM Because Missing BIOS

Whenever I attempt to start a KVM VM on Ubuntu 14.04 with the "kvm" command, I get the following error: qemu: could not load PC BIOS 'bios-256k.bin' I have searched for this file and found it ...
5
votes
1answer
173 views

Is there a way to customize “Programmable Completion” in the current session?

If I start typing a command or filename, I can use the tab key to auto-complete my string. That is well known... Is there a way to change the behavior of the auto complete for the current bash ...
4
votes
2answers
2k views

Finding an USB device path

Recently I saw this command posted on the internet: ls -l /dev/disk/by-label/ It worked, but I'm concerned, does it work on other Linux distros? How can I find USB device on the computer where USB ...
4
votes
2answers
226 views

Escape on Control key, Control on Capslock key, Capslock on Escape key

I'm looking for a method that works in both X and the console with console-setup (e.g. xkboptions, no X-exclusive methods like xmodmap). With XKBoptions, combining ctrl:swapcaps and caps:swapescape ...
8
votes
2answers
3k views

Simulate an unkillable process in D state

For catastrophe testing scenarios on out server environment we're looking for an easy way to make a process stuck in D (uninterruptible sleep) state. Any easy ways? An example C sample code would be ...

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