2
votes
2answers
5k views

Proper escaping of double quotations for curl post data?

I'm trying to test out a server, by sending it JSON data and reading the response. I need to POST data like {"item":"value with spaces"} but when I use curl I find that it sends the backslashes as ...
12
votes
2answers
653 views

How do I install syslinux/extlinux to a disk image file without requiring root privileges

I have built a home-grown Linux distribution, and I can make the complete disk image file as a non-root user with one exception -- installing the boot loader. I'm using syslinux (actually extlinux), ...
14
votes
2answers
28k views

How to move a file without preserving permissions

The problem is I want to be able to see errors when moving a file, but not see errors with permissions problem. In other words - I care if the file is not fully transmitted, but don't want to see ...
4
votes
2answers
1k views

Do not display ACK packets

I have the following tcpdump -i eth0 -n tcp port 5000 to filter every packet flowing between 2 hosts. However, one of the hosts always sends an ACK. How do I hide this ACK?
3
votes
1answer
90 views

Is each process considered a thread?

Is a Linux process considered a thread? For example, if I write a simple c program that calls pthread_create to create a new thread in main(), does that mean that I now have 2 threads, one for main()...
3
votes
1answer
1k views

Which TCP congestion control algorithm is best for low speed radio modems?

On my project we have remote Linux nodes that communicate over the Internet via very low speed CDMA cell modems. The bandwidth on these modems is about 2kbyte/second and the RTT back to the server is ...
1
vote
4answers
1k views

renaming multiple files increment order

I have the following files SSt12.precip.374.sub.climatology.ctl SSt12.precip.2874.sub.climatology.ctl SSt12.precip.3764.sub.climatology.ctl SSt12.precip.6774.sub.climatology.ctl I want to rename ...
0
votes
2answers
277 views

How do I get GCC 4.7.1 with 64bit support installed for my user account only on Solaris x86

I have been put on a task to upgrade and build 32bit and 64bit libraries for software developers to use. I need to install GCC version 4.7.1 with 64bit support on the Solaris x86 machine I'm using for ...
1
vote
1answer
66 views

What can I know about this part of code? [duplicate]

What does this part of a script do? This is a part of a scrpt in bash for j in *.* ; do cp $j ../../$name-S$i.gid/data/${j%%.*}$i.${j#*.} sed "s/$name-S/$name-S$i/" $j > ../../$name-S$i....
0
votes
0answers
361 views

Fedora: How to unlock fedora printers and add printer through command line?

I'm using a laptop which is with limited root privilege. The system is [kit@gand wgong]$ uname -r 3.10.10-100.fc18.x86_64 I want to use a networked printer in my lab. But I can't find the ...
4
votes
1answer
136 views

Memory consumption of a script

Is there way to check the memory (physical & virtual) consumption of a script, of course in the moment of its execution. Calculating the used memory minus the used memory before and after the ...
2
votes
0answers
76 views

Changing letterSpacing dynamically in urxvt

My URxvt configuration includes dynamic font settings for each F-key. With XFT fonts, I'm getting a very wide letter-spacing. I do not want to use the letterSpacing setting because my other font ...
10
votes
2answers
907 views

bash: is it safe to eval $BASH_COMMAND?

I am working on a shell script that constructs a complex command from variables, e.g. like this (with a technique that I've learned from the Bash FAQ): #!/bin/bash SOME_ARG="abc" ANOTHER_ARG="def" ...
1
vote
1answer
2k views

debian7 cron.allow & cron.deny files

Almost 3 weeks that, in my downtime, I try to find out where the files cron.allow & cron.deny are located in debian7 distro. No way, it seems that by default they are not in the system. 'Just' ...
1
vote
2answers
469 views

Play a sound file slower or faster

How can you play a sound slower or faster? That would be useful for listening carefully one audio passage or to listen fast forward to find a concrete passage. Is there something with the play sox ...
0
votes
1answer
41 views

Should apache still be making error_log files?

I have a VirtualHost set up like this <VirtualHost my.ip.address.here:80> DocumentRoot /home/todieama/public_html/dev/hop/public_html/ ServerName dev.example.com ServerAlias dev....
0
votes
1answer
147 views

Process switch with clone() [closed]

I'm new for Linux. Now, I have to write a c program and use clone() to make process do things asynchronous. I've read the manual of clone(); however, I still don't know how to make it work ...
0
votes
1answer
438 views

Sparc Solaris - install optimised GCC 4.9, 32/64 bit?

We have a new (to us) solaris 10 box running on T4 cpus. Our software stack is Perl/Oracle based. We now have to install GCC 4.9. I wish to optimise this for the T4 CPU. I think the following ...
0
votes
0answers
306 views

Teach tripwire or AIDE about renamed files

In my /etc directory there is something I do with files. Let us say that I am looking at /etc/passwd. What I do when it will be modified is to copy it over, in the following sense. I have a hierarchy ...
0
votes
1answer
2k views

using SFTP: Permission denied, please try again,

system info uzair@zaidi:~/Desktop/tftpboot$ uname -a Linux zaidi 3.11.0-20-generic #35~precise1-Ubuntu SMP Fri May 2 21:35:48 UTC 2014 i686 i686 i386 GNU/Linux uzair@zaidi:~/Desktop/tftpboot$ I get ...
1
vote
0answers
875 views

How do I set my samba share to allow guest users to view all folders and sub folders, including new and old

I currently have a samba share set up on RHEL, that allows any user to write to the root folder. I'm unable to write to the sub folders/files. I have run: chcon -R -t samba_share_t /path/to/samba/...
2
votes
0answers
81 views

How to limit network bandwidth after some data transferred?

So the question is in the name of topic. How to limit bandwidth I know. Using tc. But how to do so after, for example, traffic had reached 500MB. And after some time reset the limits.
2
votes
3answers
5k views

How to copy or read the return value (exit status) from AWK script into the shell script (bash) to be used in if statement to compare

I want to read the error codes or the exit status of awk script into shell to use in if condition to compare for error handling my shell script looks something like: My script: #!/bin/sh awk -v ...
2
votes
0answers
14 views

Setting `$EDITOR` to open file in local emacs session [duplicate]

Sometimes I need to issue a remote command which uses $EDITOR to pick the, well, editor (think git commit for example). Is it possible to use the local emacs session to open it via, for example, port ...
2
votes
0answers
336 views

Is it possible to view unicode text in tcpdump capture output?

Unfortunately seems like tcpdump is not capable of detecting and displaying Unicode-encoded text (specifically utf-8) in captures. It treats unicode text like regular binary data and displays it in ...
10
votes
5answers
5k views

How do I copy a file from multiple servers to my local system?

We have multiple deployment of an application on servers such as app00, app01 and so on. I need to copy a single log file from all these servers onto my local mac so I can perform some grepping and ...
2
votes
2answers
1k views

Is TWM still a viable window manager? [closed]

I have been using mainly KDE on my main desktop for a while now and have decided it is too bloated (e.g., my issue with Desktop indexing with KDE) and was thinking of switching to LXDE because it is "...
11
votes
4answers
1k views

How to read over 4k input without new lines on a terminal?

So I have a lot of data WITHOUT NEW LINES on the clipboard (it's a large SVG file on one line). I went $ cat >file.svg then tried to paste (in Gnome Terminal), but only the first 4kB characters ...
3
votes
1answer
281 views

Two users with different permissions on same directory

Is it possible to give two users different permissions on the same directory? I want to use it for ftp: userFull gets R+W and userLim gets only Read, depending on who logs on. Im getting stuck on the ...
3
votes
3answers
582 views

Split a returned block of text into lines in terminal?

When I give commands like echo $PATH or which program, I often get a very large block of text consisting of may directories. This is fairly useless, if I am for example, looking to see if there is or ...
3
votes
3answers
216 views

Standard and portable way to send email from console?

What is the most portable or standard way to send an email from the console or a script on Linux, and possibly Unix?
3
votes
1answer
216 views

Fetching all Git repositories in the background

I'm thinking about setting up a cronjob for fetching all my repositories every once in a while, to have the current status ready in case I'm offline. Something like the following (wrapped for better ...
0
votes
1answer
4k views

Centos 6.5 iconv 2.5 glibc

I'm using Centos 6.5 x64 for developing purposes. I need to install iconv 2.5 but could not find how. Centos 6.5 glibc version is 2.12 On Centos 5.9 glibc version is 2.5 Why newer Centos uses older ...
5
votes
1answer
2k views

WITHOUT using network command lines in linux, how to know list of open ports and the process that owns them?

I want to know which ports are used by which processes in embedded-linux. Since it is simple embedded-linux, there are no network command lines such as netstat, lsof. (only basic command lines such as ...
-1
votes
1answer
147 views

Is Perl obsolete? [closed]

Is it worth learning Perl or it is an obsolete language and other languages should be learned instead of it? I am a newbie and I would appreciate it if someone could shed light on this subject and ...
7
votes
3answers
15k views

Awk printf number in width and round it up

I need to printf a number out, but with given width and rounded (with awk!) %10s I have this and somehow I need to connect the %d but everything I do, ends up with too much parametres for awk (...
1
vote
3answers
308 views

Copying the full path of a file to text file

I want to get the full path of all files in a directory and and the entire path has to be saved in one text file. Can you give me the script for that?
1
vote
0answers
103 views

useradd command's argument issue

I am getting an issue regarding the useradd command's argument. I want to add a user with the -p option, and my process is getting an encrypted password with another process. I use the system command ...
0
votes
1answer
202 views

Is there a command which displays options like `errexit` and `braceexpand` other than `help set`?

If you type help set, then - among other things - a list of shell options is displayed. But these options are not the same as those displayed with shopt. And different also from those displayed with ...
2
votes
1answer
1k views

Difference between wine-wingdings and wingdings?

Is there any difference between wine-wingdings and wingdings (the true-type font available with Microsoft Windows)? By difference, I just mean is there any symbol that could be represented by ...
1
vote
1answer
1k views

ssh script asks for password

a little ssh issue here. I set up some keys in ssh between 2 machines and I can login via ssh without password in terminal. I am trying to write a shell script that sends commands to the remote ...
4
votes
3answers
3k views

How can I block a subdomain with dnsmasq?

I use dnsmasq as a whitelist on my network. My dnsmasq.conf file looks like this: bogus-priv domain-needed no-resolv server=/stackexchange.com/8.8.8.8 #etc... I would like to be able to block a ...
2
votes
1answer
274 views

Unreadable backup directory on a USB drive

The title pretty much sums it up. I was editing a script I wrote some time ago to automatically backup the contents of my Raspberry Pi SD card, and in the course of editing, I missed a "/", and so ...
2
votes
2answers
768 views

In Linux, why do you need to be root to write to /proc/sysrq-trigger?

WARNING: THE NEXT KEY COMBINATION WILL CRASH YOUR COMPUTER Ok, I get that this is an administrative tool and all, but I realized that any user can do ALT + SysRq + C. This link explains what I'm ...
1
vote
1answer
273 views

How to modify rngd's default command line?

I need to perform the following... rngd's default command line should be modified to add --no-tpm=1 rngd is a daemon that feeds data from a random number generator to the kernel's random ...
3
votes
2answers
2k views

dialog, trap and SIGTRAP

I've seen a lot of examples using dialog tools into scripts with lines as follows: trap "rm $datafile" 0 1 2 5 15 What I don't understand is the meaning of SIGNAL 5, ok I know is SIGTRAP. But shame ...
0
votes
2answers
4k views

How to run a command with a hidden password

I need to run a curl command that accesses a website that another person has the password to. e.g. curl --basic --user myfriendsname:friendspassword http://www.updateinfo.com I need a way where I ...
2
votes
1answer
158 views

Is there a command which creates a temporary file containing the arguments passed to it?

I can paste the contents of a file into a command using cat and backticks: ls `cat filenames` Is there a way to do the reverse - to turn a string into a (temporary) filename? gcc -o cpuburn `uncat ...
2
votes
1answer
70 views

Create a deb package from difference between two images

I am maintaining an Ubuntu server image as a development environment with several deployments. If my base image changes - install a package, modify conf files, etc - I am manually patching the new ...
2
votes
1answer
276 views

Globbing fails in zsh, but works in bash

I have an alias in bash, that I'm trying to port over to zsh. I thought it may have been the alias itself, but now it seems it's just the globbing. grep -irl --exclude=\*.{log,class,fuegoclass,dat}* ...

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