Questions specifically about Linux, as opposed to Unix-like systems in general, or to questions about a specific distribution or program.
1
vote
1answer
14 views
How to make sure only one instance accessing the file at a time in a folder?
I have a shell script which will be executed by multiple instances and if an instance accessing a file and doing some operation how can i make sure other instances are not accessing the same file and ...
-1
votes
1answer
24 views
How to disallow file modification time change for non root users
I don't want anybody to create a file then change the creation date to backward date(For example using touch or system call).
In my Ubuntu hosting account I'm getting many hacked php code getting ...
2
votes
0answers
15 views
Sending SMS in Linux? [duplicate]
How can we send a SMS message from a Linux server to mobile for notifying specific process status saying when a process goes down?
0
votes
0answers
15 views
member of different groups depending on login node
When I log into a normal ssh session I am a member of the groups I want/need to be,
i.e.
[zhermes@login01 ~]$ groups
group1 group2 group3
But when I'm logged into a different node (using ...
0
votes
1answer
17 views
How to disable weird sound when deleting entries in KeePass?
When I try to delete an entry in KeePass (v2.28), it makes some terrible noise (like a screamer) and then displays a confirmation dialog. I've searched through available settings but haven't found a ...
1
vote
0answers
27 views
monitor a process by matching the full cmdline
I'm looking for a software that can monitor a process (specified as a partial string/regexp match (e.g. grepping) in its full command-line) in terms of cpu and memory usage. If any of those processes ...
0
votes
1answer
22 views
Getting video card product name in terminal
My laptop is equipped with an Intel i5-3317U CPU that, according to this, comes with an Intel® HD Graphics 4000 video card.
However, with lspci | grep VGA I get "Intel Corporation 3rd Gen Core ...
2
votes
1answer
30 views
fault-tolerant crond replacement
I'm looking for a replacement to crond, or possibly an extension of it.
The feature that I definitely would want to have is fault-tolerance. E.g. if a job failed to run due to the computer not being ...
1
vote
0answers
10 views
Using 1G transparent hugepages on Fedora 20
My scenario is a 1TB Intel workstation with Fedora 20 with a single process using almost all memory (and most memory allocated by the process comes from two almost-half-terabyte allocations; then ...
2
votes
1answer
11 views
How to use xinput to configure multiple devices with a script?
How do you configure xinput to set multiple devices automatically using a script?
$ xinput --list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core ...
3
votes
0answers
25 views
Bad/strange USB device issue: failed to shutdown/restart
On a fresh Arch Linux installation with Intel i7 processor and an Nvidia graphics card, I noticed during boot log messages related to a usb device filled the screen before it reached the graphical ...
2
votes
2answers
18 views
Buffering (named) pipe in GNU OS
In the GNU OS a process can only write data to a pipe if another process reads the same data (from the same pipe) at the same time.
Is there something like a pipe which lets the 1st process write and ...
0
votes
2answers
17 views
LVM move logical volumes across physical volumes without data loss
I wonder how can I move my logical volumes from current physical volume to another without data loss. I have read mans but I haven't found this information there.
I would be grateful for any help. ...
2
votes
1answer
49 views
How to set-up a Gnu/Linux distro for kids? [on hold]
I will have to repair a computer, which will be used by kids (9-12 years).
This computer had Vista, but I will install a Gnu/Linux distro, for security/pedagogic reasons.
I just come here to ask if ...
3
votes
1answer
47 views
How can I prevent disk I/O from taking over my CPU?
I run Debian Jessie on a quad-core i7 processor, which results in 8 cores being shown thanks to hyperthreading. On disk-heavy loads, all eight cores are maxed out with io-wait, as shown by htop. This ...
0
votes
2answers
22 views
Setting Up VPN Practice/Service Without Access to Private Internet
I use Lubuntu 14.04.
I've gotten concerned about encrypting my internet traffic after reading about the problems with public WiFi and intend to start using VPN.
However, all my internet usage is on ...
1
vote
0answers
22 views
chromium-browser processes' cmdline not available in full form
I am running Ubuntu 14.04, with 3.13.0-38-generic kernel on a MacBookPro11,2. (late 2013)
I'm trying to get the process ids of all chromium-browser processes, a bit selectively such as only renderers ...
1
vote
2answers
73 views
Why should you not edit the .config kernel configuration file?
# Automatically generated file; DO NOT EDIT
Is at the header of the kernel configuration file: /usr/src/linux/.config
My question is why, why should you not edit this file? If I know exactly what I ...
2
votes
0answers
11 views
How can I properly QoS streaming services on OpenWRT
I'm going to start by explaining my naivete, I'm not sure, if netflix via a web browser uses the same protocol (http?) as netflix via a smart tv, for example. I'm using OpenWRT 14.07 currently, and am ...
-3
votes
0answers
26 views
is it possible to run a linux in recovery mode [on hold]
I would like to enter in a Debian Linux located in one micro SD card
starting an update.zip in recovery mode
I think it is possible by a switch_root. I don’t know what exactly does /sbin/init, are ...
1
vote
0answers
15 views
How can I make wlan0 show up automatically when I plug in my WiFi USB adapter?
Before I plug in the USB there is no wlan0:
root@beaglebone:/mnt/etc/network# iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
usb0 no wireless extensions.
...
2
votes
1answer
67 views
Tool to give only the built linux source code
Linux is large complex piece of software. A running kernel in the system would not be using all the code.
I'm looking for a tool which can give me the source code needed for the .config I used to ...
-4
votes
0answers
17 views
best linux for low graphics(7872kb)? [on hold]
iam looking for best linux distibution for low graphics.,,.,.,.
1
vote
3answers
62 views
What are the advantages of GRUB over LILO?
Why is GRUB so much more popular than LILO? The only distribution that I can think of that uses LILO by default is Slackware Linux. All other distributions use GRUB. To this day I've never understood ...
4
votes
1answer
35 views
Why does BASH process substitution not work with some commands?
On occasion process substitution will not work as expected. Here is an example:
Input:
gcc <(echo 'int main(){return 0;}')
Output:
/dev/fd/63: file not recognized: Illegal seek
collect2: ...
5
votes
4answers
166 views
Where does `hostname` store the hostname that I've set?
This is quite puzzling. Does anyone know where the hostname command stores and reads hostname from?
I thought it was /etc/hostname but there is no such file on this Linux system that I'm using. I ...
0
votes
0answers
17 views
CentOS 7 and howto extend my current WIFI network
I am running CentOS 7 and I have both a wired cable and a WIFI on my box. The WIFI on my CentOS box I would really like to use to extend my current WIFI network if this is possible. My current network ...
1
vote
0answers
13 views
What tools can show me the CPU usage that doesn't appear in top/sar?
I have a virtual machine that's using ip_tables to set up some connection forwarding. According to top, sar and /proc/stat, I'm > 99% idle. However, perf says I'm only about 72% idle, with the rest ...
-2
votes
0answers
20 views
Need Script to Find Duplicate PID in a process [on hold]
I need a Shell script to find the duplicate pids in the process. Please advise me
Thanks,
Srikanth.V
0
votes
0answers
22 views
Are there scenarios where a space is required after a redirection symbol? [duplicate]
I was recently reviewing some old cron tasks and noticed that I had entries ending with >/dev/null 2>&1 instead of > /dev/null 2>&1 (note the space). That got me to thinking - ...
2
votes
1answer
30 views
Move thousands of jpg files into daily directories based on the files EXIF creation date
I have thousands of jpg's and mp4's that need sorting into a directory structure which name is based on the date the picture was created. Preferably from the EXIF date as the files modified date might ...
1
vote
1answer
18 views
What's the purpose of the --class option in grubs menuentry?
As the title say, why would I want to add a class to my menuentry (in grub2)?
If I understand the grub manual correctly, it could be used with themes.. But is that all?
3
votes
1answer
40 views
SSH not logging properly
I am looking at /var/log/auth.log on a Debian Webserver, and the last thing it logged was:
Jul 2 21:09:01 h311 /USR/SBIN/CRON[25912]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d ...
0
votes
2answers
25 views
Resize root LVM and FS in Debian 7
I have a Debian server and I would like to increase the "root" partition from 5GB to 17GB and to diminish the "home" partition from 14GB to 2GB. I am a newbie in linux sysadmin, so a really need your ...
3
votes
2answers
118 views
Shell script to assign values from a lookup table is too slow
I'm trying to assign some variables from a lookup file with a shell script.
I have something working but it seems unnecessary slow.
Script:
while read line
do
...
0
votes
0answers
9 views
How to find out if F20 (Linux) is reaping the maximum benefit from my hardware
I have a new laptop HP Pavilion x360 and I wiped out the windows 8 and replaced it with Fedora 20. My question is if there is a way for me to find out if my display driver can be improved or if any ...
1
vote
0answers
10 views
How to disable USB Keyboard at run time from udev.c not from udev rules
I want to disable my USB keyboard at boot time (in some scenarios) without modifying udev rules, as I know udev rules only works when a device is attached or detached from the target.
Is there any ...
-3
votes
0answers
14 views
How mail works? What are the files it refers to send a mail from a mail client to get acknowledgement from mail server? [on hold]
Logically how mail works? from source to destinations how many files, stages it referes.
How mail works? What are the files it refers to send a mail from a mail client to get acknowledgement from mail ...
2
votes
1answer
16 views
How to do mac spoofing on Linux Mint 17?
How to do mac spoofing on Linux Mint 17?
Through macchanger -a I've tried to changemy mac address but new mac id doesn't authenticates successfully. pppd gives successful authentication message only ...
1
vote
2answers
28 views
How to install jdk in Linux Mint
I am unable to install jdk on Linux Mint.
I tried the following:
# apt-get install openjdk-7-jdk openjdk-7-doc openjdk-7-jre-lib
Reading package lists... Done
Building dependency tree
Reading ...
0
votes
0answers
4 views
OpenSuse 11.1 Keyboard Issuses
Im having some repeat issues with my keyboard being unresponsive. Im using opensuse 11.1 with a 2.26.27* kernal and it seems to be getting worst. When the keyboard dies (although the mouse works) , ...
0
votes
1answer
24 views
Using find to search and report files that have one but not two keywords inside
I'd like to use find to report files under the following conditions:
If the file contains the word "Serializable"
Then report the file if it does NOT contain the word
"serialVersionUID"
Something ...
1
vote
0answers
19 views
grep not matching patterns in scripted session [on hold]
We have a bunch of reports that run on a Linux server and I am trying to automate checking them and bringing back relevant parts using Powershell. I'm using a module called SSH-Sessions to connect to ...
0
votes
0answers
14 views
How to Install PHP 5.3.7 On Godaddy Linux VPS using SSH
I have bought a New VPS from Godaddy.
They supported PHP 5.3.5 earlier and then 5.4.34 but I need to use PHP 5.3.7 on my VPS.
1
vote
1answer
39 views
Place grub on virtual disk
To learn about Linux startup process I placed grub in a disk image file and tried to boot using qemu. I currently has not put any kernel image into the drive just grub. I installed grub using
kpartx ...
4
votes
1answer
44 views
inotifywait - get old and new file name when renaming
I'm looking for a reliable way to detect renaming of files and get both old and new file names. This is what I have so far:
COUNTER=0;
inotifywait -m --format '%f' -e moved_from,moved_to ./ | while ...
2
votes
1answer
29 views
Bash script to verify that an rpm is at least at a given version
I need to write a script to verify that an RPM is at least a given version in Linux.
QUESTION 1: How can I get the RPM version in a variable $RPM_VERSION, so that it contains the version all the way ...
0
votes
0answers
16 views
uBoot on BananaPi, stuck waiting for waiting for root device /dev/mmcblk0p2
I flashed banian linux 14.09 to an SD card stolen from a raspberrypi. I've plugged a 2.0amp raspberrypi power supply into the correct microusb power port (the one by the SATA connector).
Boot stops ...
7
votes
2answers
56 views
How did the Linux Kernel project track bugs in the Early Days?
We all know that Linus Torvalds created Git because of issues with Bitkeeper. What is not known (at least to me) is, how were issues/tickets/bugs tracked up until then? I tried but didn't get anything ...
1
vote
1answer
20 views
What directory houses the scripts that get executed with new kernel installations?
This one is pretty much a straightfoward question/answer I just can't locate the information.
I'm trying to automate the re-installation of VMWare tools based off when a new kernel is installed. I ...
