3
votes
1answer
330 views

Anyone gotten the switch '-segment_times' working with ffmpeg?

While searching through U&L I noticed a fair amount of questions asking how to script the generation of ffmpeg command lines like these: ffmpeg -i video.mp4 -ss 00:00:00 -t 00:10:00 -c copy ...
2
votes
3answers
313 views

Concatenate files in multiple matching subdirectories

I need to concatenate files based upon the name of the subdirectory they are in. The subdirectories sometimes have duplicates and sometimes don't. The file structure looks like this: RootDir 633 ...
1
vote
1answer
90 views

Why have a fake LR-WPAN driver?

In the Linux kernel configuration, a fake LR-WPAN driver can be enabled and added to the kernel that will be compiled. Why would someone want a fake LR-WPAN driver? I assume it would be for debugging, ...
6
votes
7answers
4k views

What is the easiest way to add a string on the beginning of every line of the file from the command line?

I am looking for a way to add some string to the beginning of every line (same string for every line). Not something customizable but rather something that will be easy to remember and available on ...
0
votes
0answers
252 views

tweaking the gentoo livecd for a 100% headless install

I am trying to enable ssh and a create a static root password for the live-cd. While the process seems quite obvious, I haven't been able to get a bootable image out of it. SSH-enabled gentoo livecd ...
1
vote
1answer
116 views

ksh: to print the fourth line above the matched line and second line after the matched line

This is the sample log file : 64.242.88.10 - - [07/Mar/2004:16:05:49 -0800] "GET /twiki/bin/edit/Main/Double_bounce_sender?topicparent=Main.ConfigurationVariables HTTP/1.1" 401 12846 64.242.88.10 - - ...
2
votes
2answers
279 views

Is it possible to run a private mailserver?

Last week my email provider (mout.web.de) got listed on spamcop. So I cannot send emails to recipients whose mailserver uses spamcop. An obvious solotion, which popped up in the forums, is to switch ...
1
vote
2answers
42 views

Counting numbers in Emacs

Say I have the following long line selected in Emacs. How can I cound how many numbers (or NaN) I have? I tried M-x count-words but it yields the wrong number. It says 1 line 1135 words and 3565 ...
0
votes
1answer
233 views

mc: customizig colors with skins

I am editing the default skin for midnight commander and I would like to add some more rules for file highlighting. In the filehighlight section, there are several categories, for example archive=red; ...
5
votes
1answer
3k views

Mosh: Retain backscroll beyond terminal window height [duplicate]

I'm experimenting using Mosh instead of raw SSH for remote shell connections. So far I like it, but I've become used to being able to page-up or scroll through backscroll in my terminal window to see ...
4
votes
4answers
423 views

How do I aggregate data from many files into one file?

I have this directory structure for about 100 users. users - user1 - info.txt - user2 - info.txt - user3 - info.txt ... Inside the info.txt files, the contents look like this. 5 ...
5
votes
3answers
251 views

Is there something like closures for zsh?

I just decided to try zsh (through oh-my-zsh), and am now playing with precmd to emulate a two-line prompt that has right prompts in more than just the last line. So I clone the default theme, and ...
1
vote
1answer
203 views

Vim key binding to cycle through windows

How do I bind one single key to cycle through the windows? For example, each time I want to switch a window, I have to click ctrl-a (default was ctrl-c) then use arrow key up/down/left/right to ...
12
votes
0answers
359 views

Should I use $* or $@? [duplicate]

Which one of $* or $@ is better to use (in array syntax,command line parameters, etc.) to avoid any bugs/problems in code? Or it does not make any difference?
0
votes
2answers
5k views

ksh :To store the output of a awk command in an array

I've the following awk command: awk -F ' ' '{ print $NF }' log filename And it gives the output as below: 06:00:00 parameters: SDS (2) no no no no doc=4000000000). information: 0 5898 5898 ...
6
votes
3answers
203 views

Excluding . and .. from results in find and ls

Is there any way to prevent find and ls -l from listing . and .. in their results? I never care about seeing this result in the output, and it prevents me from effectively piping their output to wc -l ...
1
vote
0answers
224 views

error running raidctl on Solaris 10

I am trying set up a disk mirror on a Solaris 10 system. The two disks are identically formatted and not mounted. Neither is a boot disk. I ran the following: # raidctl -c c1t2d0 c1t3d0 ...
2
votes
2answers
5k views

Unable to run 'sudo chmod +w /etc/hosts'

I am logged into my remote VM (running out of ESXi) as user xyz. I wanted to change my /etc/hosts to add some network names that were not visible by default. I first tried to run sudo vi /etc/hosts ...
4
votes
1answer
2k views

Launching applications from a terminal with specific window size and location

I am running Linux Mint 13, with a KDE 4 desktop manager. I would like to launch applications from a terminal (konsole in my specific case) and setting the exact size of the window and the location of ...
8
votes
2answers
3k views

Real-World Use of TCP_DEFER_ACCEPT?

I was perusing the Apache httpd manual online and came across a directive for enabling this. Found a description in the man page for tcp: TCP_DEFER_ACCEPT (since Linux 2.4) Allow a ...
5
votes
4answers
1k views

How can I partition a volume in a regular file without loop?

I'm trying to play around with OS development, and I started with a boot loader, where phase 0 loads phase 1 from a file (specified by inode) on an ext4 partition (specified by first LBA). Of course, ...
4
votes
2answers
664 views

Compiling C++11 code on old machines

I'm trying to compile a C++11 project on a bunch of old machines with old kernels. They're running CentOS 6.2, 6.3 Alt Linux 4.1. Others are unknown but similarly old. The machines won't let me ...
3
votes
1answer
310 views

Slackware 14x86_64, gnome 3.6 and alps touchpad scrolling settings

I have a Dell Latitude E6510 with Slackware 14x86_64, gnome 3.6 (dropline), alps dualpoint touchpad and the latest 3.11.4 kernel. My touchpad is being detected correctly and I have the touchpad ...
1
vote
1answer
2k views

RPM: failed jre dependency, even though that JRE version is installed

I am trying to install a package, and it fails reporting a missing dependency: # rpm -ivh * error: Failed dependencies: jre >= 1.7.0 is needed by Tomcat-7.0.37-1.noarch At the same time, ...
1
vote
3answers
2k views

Error : /etc/sudoers not working - Ownership wrong

I have Ubuntu 12.10 on my client system. I have an error /etc/sudoers is owned by uid 1000 should be 0. I tried booting from an Ubuntu live CD and tried: sudo chown root:root /etc/sudoers sudo ...
5
votes
1answer
3k views

How to use specify version of ruby for shell script with rbenv?

I'm going to write some short script in ruby. And I want to specify ruby version by shebang or in another way. I'll use the script in many environments. I'm using rbenv in the evironments, but it's ...
0
votes
2answers
406 views

mc: edit skin color

I am trying to edit color skins for midnight commander. When using 256 color palette, the colors are called color1 to color255. I am looking for particular tone of blue. Is there a palette of all 256 ...
6
votes
2answers
2k views

Massive, unpredictable I/O performance drop in Linux

I'm using Debian testing without any problems for ~6 years (I'm just regularly updating it), but recently it started to show a random behaviour that can be summarized as "Low I/O performance which ...
6
votes
4answers
15k views

Running python script from Linux Terminal

I have downloaded this script named, pyAES.py and put it in a folder name codes, inside a Desktop directory of my Linux, According to this example, ...
4
votes
1answer
972 views

Cowfiles directory?

My bashrc issues a cow from cowsay and with a random fortune. Like this: echo -e "\e[00;33m $(fortune -a -o -s | cowsay -f $(ls /usr/share/cowsay/cows/ | shuf -n1) | sed -e 's/^/ /g')\e[00m" ...
2
votes
1answer
3k views

Zabbix-agent: cannot stat 'filename.log': [13] Permission denied

I have installed Zabbix-server and zabbix-agent and trying to add trigger to check log file. But in /var/log/zabbix/zabbix_agentd.log I got the same error every time: 10832:20131008:125634.180 ...
1
vote
2answers
724 views

Extract TAR to SD-Card and verify contents afterwards

We currently extract a TAR archive to a SD-Card like this tar xf ${ROOT}/rootfs.tar -C /cynox/${DRIVE}/${TARGET} As a side note: The rootfs.tar contains files for an embedded Linux system. Some of ...
3
votes
0answers
30k views

No route to host using ssh [closed]

I have a issue with remote server connection using ssh. I have a serverA on xxx.xxx.xxx.xx1 with default port 22. I have an another serverB on xxx.xxx.xxx.xx2 same default port22. Now I want to ...
0
votes
1answer
3k views

shell script to print rows if there is a value in column 2

1 2 3 4 3 1 4 2 1 4 3 2 4 2 1 3 How can I print all rows, on which there is a 2 in the second column.
2
votes
1answer
505 views

Gdm uninstallation fails (“pre-removal script returned error”)

I installed gdm on my vps and now I want to remove it but get this error: root@server2:/etc/init.d# apt-get remove gdm3 Reading package lists... Done Building dependency tree Reading state ...
1
vote
2answers
5k views

How To Install Thunderbird 24.0 on centos

How do I update thunderbird to latest version 24 on centos 6.3 (final) 64bit. I cannot find any good tutorial on installing it on centos. Merely copying and pasting the 'thunderbird' folder in ...
6
votes
3answers
1k views

A virtual file containing the concatenation of other files

Is there a way of creating a filesystem object akin to this: mknod files p cat file1 file2 ... fileN > files but such that it can be seeked in, as if it were a regular file?
0
votes
2answers
1k views

any command that can format html or xml from shell? [closed]

There must be something on the lines of sed? Normally in sed you type something like: echo day | sed s/day/night/ the shell prints "night". Is there something that can take a file (containing ...
2
votes
2answers
654 views

Desktop audio falls behind when recording microphone + desktop audio + screen using ffmpeg

I have put together this script for recording the microphone, the desktop audio and the screen using ffmpeg: DATE=`which date` RESO=2560x1440 FPS=30 PRESET=ultrafast DIRECTORY=$HOME/Video/ ...
2
votes
2answers
559 views

netcdf installation and usr/local… folders

I need to install netcdf on a SuSE Linux machine but I am having a few problems understanding the usr/local/ folders and my the myusername/local/ folders. What I think I need to do is go into the ...
1
vote
1answer
128 views

Java PATH issue when installing JDK7 on centos 32 bit

I have Installed JDK 7 on CentOS 32 bit virtual machine. I also have set the path for java. In one terminal it is showing java1.7 But when I open another terminal and look for, java -version It is ...
3
votes
2answers
1k views

Who is file owner if the file is created using sudo command?

I logged in using my username ravbholua: ravbholua@ravbholua-Aspire-5315:~$ echo $LOGNAME ravbholua I create file named a1: ravbholua@ravbholua-Aspire-5315:~$ echo>a1 ...
20
votes
3answers
32k views

what is the meaning of 0.0.0.0 as a gateway?

Can anyone clarify gateway assignment for me? What is the difference between adding gateway as 0.0.0.0 and assigning a specific ip address as a gateway?
5
votes
1answer
5k views

How search for a file beginning with either a or z and ending with a or z?

I attempted find -name 'a*' 'z*' '*a' '*z' but it gave me the error code find: paths must precede expression: z* I know how to find files starting with a though z, or ending with a-z, but not ...
3
votes
3answers
2k views

Rsync problem with cron and no problem manually

I have a backup.sh file that launch an rsync command. This rsync is to backup my dedicated server on a RaspberryPi running raspbian. (I use keychain so I don't need to type any password etc ...) The ...
2
votes
2answers
1k views

Unable to install any programs

I'm trying to install programs but no matter what program I try installing I get the following error. For example I downloaded skype 'skype-debian_4.2.0.11-1_i386.deb' and ran the command: $ cd ...
2
votes
2answers
552 views

How can I manage my crontab effectively to avoid issue by multiple updates by multiple users?

I have a crontab that includes many users updating it. The problem is that because of this, it is not easy to know who did what modification of a cronjob. I was thinking to create a script to do a ...
0
votes
4answers
68 views

cut+sed function joined

Input dir/foo Output dir./ so I need: echo 'dir/foo' | MAGIC Q: What is MAGIC? (something like a cut+sed joined:D)
2
votes
1answer
554 views

What is the difference between minicom and gammu-smsd?

My understanding of minicom: Minicom is a text-based modem control program (allows you to communicate with modem via at commands on a text-based terminal) using serial port communications. Therefore, ...
6
votes
2answers
1k views

RAID 5 with 4 disks fails to operate with one failed disk?

I found a question about mdadm spare disks which almost answers my question, but it isn't clear to me what is happening. We have a RAID5 set up with 4 disks - and all are labeled in normal operation ...

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