Ubuntu is a Linux distribution with an emphasis on ease of use and installation. Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.

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Problems with postfix/dovecot unable to receive mail

Can't receive mail on my server but can send just fine. From what I can tell in the logs, it complains about timing out. I check the connection externally using telnet from my PC, I can connect to ...
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1answer
28 views

Subversion server on ubuntu with mutiple repositories and checkout problem

I have 3 customers, FirmA, FirmB and FirmC. Under directory /srv I've created three subdirectories, FirmA, FirmB and FirmC that will act as a svn root for every firm. Inside svn root directories I've ...
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1answer
308 views

Debhelper recursive dependency

Unfortunately, debhelper has a recursive dependency. When I try to install with apt-get source --compile debhelper, it says: Reading package lists... Done Building dependency tree Reading ...
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0answers
56 views

Run ssh-agent 24/7 using keychain?

I have a Node.js script that requires ssh-agent to be running 24/7 on my Ubuntu server. I installed keychain and put eval 'keychain --eval id_rsa into my ~/.bash_profile, but that only runs when I ssh ...
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1answer
118 views

Understanding home folder permission

thisisme@ubuntu:/home$ ls -al total 28 drwxr-xr-x 4 root root 4096 4月 19 2012 . drwxr-xr-x 24 root root 4096 4月 9 12:34 .. drwxr-xr-x 66 thisisme thisisme 4096 4月 12 10:...
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1answer
63 views

Ubuntu 14.04 - Force using home and end as keyboard shortcuts

I'd like to be able to use the Home and End keys as shortcuts, but Ubuntu's settings absolutely refuse to let you do so by normal means because it'll become "impossible to type using this key." - That'...
0
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1answer
843 views

Missing panel icons in elementary OS Luna

Dropbox, Network (Wi-fi) and Mega icons are gone. I don't know how it happened, perhaps an apt-get update or something. Those icons should be placed besides that volume icon. What I have to do to ...
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2answers
452 views

kernel compilation in ubuntu, reboot msg “gave up waiting for root device”

I was trying to compile Linux kernel from source file i.e. 3.19.3 kernel version I ran the following commands for compilation first I extracted tar -xvf linux-3.19.3.tar.xz changed to its ...
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2answers
602 views

Shell script to find number of vowels in script

This is the script: clear echo read str len=`expr length $str` count=0 while [ $len -gt 0 ] do ch=`echo $str | cut -c $len` case $ch in [(aeiouAEIOU)] count=`expr $count + ...
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1answer
83 views

Cron job * is replaced by file name in current directory [duplicate]

This is my first shell script program, so i think this is more likely a silly question for you all. Overview of problem My need is to write a shell command for installing our Node.js server. ...
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1answer
6k views

Disable login screen on Ubuntu 15.04 (Vivid Vervet)

In 15.04 Vivid Vervet, how do I disable the login screen so that it drops me into a console right off the bat? Back on 14.04, I did this by uninstalling lightdm, but when I tried that on 15.04, the ...
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0answers
570 views

Force OpenSSH / pam / pam_ldapd to do pam_ldapd(sshd:auth) with public-key authentication

I have working pam_ldap authentication using libpam_ldapd. I'm using slapo-nssov and want to use loginStatus attribute which is added to users ldap entry after opening pam session and deleted when its ...
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35 views

date advancing quickly ubuntu 14

after an upgrade of my server from ubuntu 12.04 LTS to ubuntu 14.04 LTS my system date is advancing quickly (taking 1h every 10 minutes). I tryied to install an ntp server to correct date but no way ...
2
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1answer
1k views

Configure Ubuntu to always start with terminal & Xload open?

Does anyone know how to configure Ubuntu 14.04 so that when it starts up I have a terminal window open (at my specified x,y coordinates and specified width and height), and the Xload application also ...
1
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1answer
329 views

find the cause of file corruption when copying files to a network share on an Ubuntu machine

I am copying files from my SD card to my Ubuntu server via Windows 7 using a network drive. The problem is that sometimes, 2 files out of 150, are corrupted during transfer. See here 2 example files ...
2
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1answer
43 views

Tool to list every e-mail detail sent from a server

Introduction: I have a specific problem with an Ubuntu server where some security leak allowed spammers to use the server to send e-mail. I fixed most of the problems (caused by some unsecured ...
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1answer
43 views

GRUB is not working

I've installed ubuntu alongside windows7 in laptop. When I restart after installation, it is directly entering Ubuntu OS. It is not showing the option which OS to choose. Windows is not deleted ...
2
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1answer
99 views

Why do the two scripts work for waking from suspension?

My Ubuntu 14.04 on Thinkpad T400 sometimes (but not always) can't wake up from suspension. While I am still suspecting my graphic controller's driver, I found two scripts (here and here). I don't ...
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1answer
256 views

cp: cannot stat error - when filename has Asian characters

I am simply trying to copy files using cp -r /home/user/source/ /home/user/destination/ but it throws me the cp: cannot stat /source/filename.xxx error for some of the files. When I searched for this ...
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2answers
292 views

How can I alert on completion of a long task over ssh?

My desktop is Ubuntu, which has the handy program notify-send, which pops up an alert on the desktop. It also has the following handy alias built in: $ type alert alert is aliased to `notify-send --...
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1answer
878 views

Ubuntu Postfix Open LDAP integration - no SASL authentication mechanisms

Ive followed all the steps in https://help.ubuntu.com/community/Postfix/DovecotLDAP but I am getting a localhost postfix/smtpd[12520]: fatal: no SASL authentication mechanisms in my /var/log/...
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1answer
1k views

Linux kernel version suffix + CONFIG_LOCALVERSION

On system start up I currently see Linux 4.0.0-rc6yy and 4.0.0-rc6yy.old from the bootloader menu. I'm not certain where they came from. I suspect "yy" is arbitrary but can someone explain the ".old" ...
2
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1answer
593 views

Troubleshooting SSH on Ubuntu Server

I am trying to setup SSH-key authentication on Digital Ocean Cloud server. I first added my rsa_id.pub to my account and autoloaded it to the ubuntu droplet when I created it. There seems to be an ...
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1answer
215 views

Is my server being used as a proxy or malicious requests?

I have an Ubuntu, Apache, Passenger, and Rails 4 project on AWS EC2. I am a beginner full stack developer and am unfamiliar with the security and server side of my project. This is my first time ...
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1answer
400 views

Mysql exited with status 1 and restarted every 24 hours? How to debug?

After upgrade, MySQL on Ubuntu 14.04 keeps crashing and is restarted every 24 hours according to the dmesg. I would expect to some reason for the failure in MySQL logs, but all are empty. Any ideas ...
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2answers
1k views

Installing an unauthorized wifi card in a Lenovo thinkpad edge 14

I took out a my Intel dual band Wireless AC 7260 card model number 7260HMW from another laptop. I wanted to install it in my thinkpad. Upon doing so and rebooting, the computer said unauthorized wifi ...
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2answers
113 views

Can't find emails retrieved by fetchmail

So I set up fetchmail to retrieve emails with IMAP from a remote mail server, I was able to run it. How can I know that it found any emails or not since I did send test emails to the account being ...
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2answers
156 views

Package deb dependencies unmet error

I am trying to install deb package in a new AWS 14.04 ami instance, but it fail with the following error - The following packages have unmet dependencies: youtube-snapshot-taker : Depends: firefox (...
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1answer
83 views

Is it possible to access opened gnome terminal session in text console?

I am running Ubuntu 14.04. My desktop environment (compiz and unity) sometimes becomes frozen, which makes it difficult to save my work including text editing in emacs running in gnome terminal. ...
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1answer
459 views

Shell script to compare two tables and perform operations on their columns

I have two tables like the following: Table 1 TABLE_NAME COUNT ------------------------------ ------------ AIN_EDP_SCRIPT 33 AMA_CALLTYPE_LOOKUP ...
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1answer
498 views

How to move mysql database and mysql server to another machine

I am having Ubuntu 14.04 desktop in which i develop software. Due to some reasons my hard disk has developed many bad sectors. I want to move my mysql server software and all the databases to a new ...
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1answer
301 views

How to know which platform I am using in lubuntu, ubuntu or kubuntu

I need switch script in between lubuntu, ubuntu, and kubuntu. How can I know which platform the script is running in? Because uname/lsb_release never show different in those 3 releases Lubuntu$ ...
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2answers
88 views

xterm formatOtherKeys not working on Ubuntu?

I'm trying to run xterm and have it pick up key bindings such as Ctrl-; Ctrl-. Ctrl-, etc.. (I like to use these bindings in emacs -nw) After some reading online I managed to get a working setup ...
3
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1answer
577 views

Reading the program header contents of an ELF file

How is it possible to extract loadable program headers individually from ELF files? By examining a binary using readelf one can get output similar to: $ readelf -l helloworld Elf file type is EXEC (...
2
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1answer
149 views

How to make sshd listen to two ports, but restrict one of them to a single source address?

I need sshd to listen both on port 22225 (allowing connections on that port from any IP) and port 22 (allowing just a single static IP on that port). In other words, listen on two ports at the same ...
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0answers
75 views

Java JRE 6 installation

I installed Java 6 (jre-6u45-linux-x64.bin) on a Ubuntu 12.04 machine following the procedure from this link: http://ubuntuforums.org/showthread.php?t=1904467. When I later installed Java 7 and ...
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3answers
9k views

Live USB repeatedly gives error 'Failed to load ldlinux.c32'

I'm trying to put Ubuntu on my desktop. Right now, it and my laptop are running Manjaro 3.18. I've been using Unetbootin to create the live USB on my laptop. I've tried several different versions of ...
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1answer
224 views

How to set the monitor brightness gracefully at boot time?

I've been using a loop that contains xrandr --output VGA1 --brightness 0.3 in a bash script which will automatically execute right after logging in by gnome-session-properties (a.k.a. Startup ...
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0answers
246 views

Can I print via CUPS on ARM device without drivers by installing CUPS onto an x86 server with drivers?

I just spent a few frustrating hours troubleshooting on a Raspberry Pi 2 only to find out that it is impossible to print to my Canon printer natively using CUPS. Thankfully, my printer supports Google ...
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1answer
380 views

Why are files and directories colored in different ways? [duplicate]

On Ubuntu 14.04, in bash under gnome terminal, Why are files especially directories colored in different ways? The green colors hide the text to me (How about to you?). Is it done by terminal or ...
11
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3answers
1k views

Ubuntu - No space left on device (NTFS)

I have a server which stores a lot of data, I keep many nested directories with millions of files in them. While trying to move one big directory (~700GB) from one disk to another I get an error: mv ...
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949 views

Sound is not working in Ubuntu 14.04: suddenly stopped

The sound suddenly stopped working in my Ubuntu, so I googled and followed this link but it doesn’t work to me. Output of aplay -l: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA ...
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1answer
182 views

How to setup the quota for NIS user

I have 3 VM's and configured NIS server one VM, user account created for client access also done. NIS client configured remaining two VM's. I am able to login through what I created username in NIS ...
0
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1answer
69 views

Load Linux Kernel Modules

I need to load the kernel modules nandsim.ko, ubifs.ko and ubi.ko with modprobe. Unfortunately my SuSE 9.3 machine (no internet connetion!) doesn't have them, but I found them on my Ubuntu machine. Is ...
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1answer
123 views

svn checkout without tags

How to checkout the repository without tags in svn. Created tags in repository. Now whenever client users do svn checkout that tags also downloaded. So I need to svn checkout the repository without ...
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0answers
40 views

oem-bt-ar-9462-dkms error in Ubuntu

I am new to ubuntu and Linux and i was recently prompted to install new updates and this error keeps popping up. Is there any way that i could resolve this? I am not sure what to do here and any help ...
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1answer
48 views

Scheduling a task whenever the system starts

I've installed Ubuntu alongside Windows 8.1. I want to create a task that mounts some of my Hard disk drives whenever the system starts. What Linux command can I use? Thanks in advance.
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334 views

Error during ubuntu upgrade (errors were encountered while processing)

I am trying to upgrade my ubuntu from 11.10 to 14.10 but I got this error message when I ran sudo apt-get -f install errors were encountered while processing: /var/cache/apt/archives/udev-204-...
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1answer
188 views

I need dhclient to flush IP address/routes when link goes down

I am running one Ubuntu Server 14.04 with network configuration using /etc/network/interfaces and so ifup/ifdown scripts. I realised that if I configure one interface in DHCP mode, then I unplug the ...
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1answer
191 views

Terminal Emulator with CTRL+Scroll Zoom

Are there any Linux Terminal Emulators that offer "control & scroll zoom" (allowing you to adjust the visible size of fonts by holding down ctrl and scrolling your mouse-wheel)? Recently on ...