0
votes
0answers
7 views
Where is the cron timer
Is there any way to access the cron timers and get the seconds left until the next execution of scripts in the crontab or maybe the seconds since the last?
0
votes
0answers
10 views
Best way of updating Openssl on Linux machine
I have a confusion to choose the best way for upgrading the OpenSSL on my Linux machine.
1*Through the yum Update.*
# yum update
I know this will update the entire packages. But If I want to ...
0
votes
0answers
3 views
Kate editor: how to jump to modified lines?
Say I'm editing a long document and I have made a number of changes. I want to be able to jump to each changed line. Is there a way to do this?
I know about line modification indicators and I have ...
0
votes
0answers
6 views
yum update version issue
I am using fedora 13 (2.6.33 ). Due to some reasons I cannot update the kernel nor can I upgrade fedora itself to 18. So my question is how do I update my applications to the latest versions using ...
0
votes
0answers
3 views
Package Installation log creation
I have written a script for installing packages on Linux(Ubuntu). So I want to create a log file for installation of packages for troubleshooting if any problem occur during installation.So please ...
0
votes
1answer
13 views
AWK how to add all columns beginning with specific row
I have this output:
Count Process
238 0
1 1124027
1 1124065
1 1124066
1 1124069
1 1124072
1 1124073
1 1547365
1 1547366
I wanted to add all Count ...
0
votes
1answer
12 views
How to get “current glob” in zsh
I want to do something like:
$ convert [a,b,c,d,e].png -resize 50% <current_match>_half.png
How can I do this? Is there some variable that stores the current match? I couldn't find anything in ...
0
votes
0answers
4 views
Do I need to install LIRC seperately in Fedora 18?
I just finished installing Fedora 18 and out of the box I noticed that it recognizes my IMON/MCE Remote control. I have had to make some changes to the rc_keymaps/imon_mce file to remap some of the ...
0
votes
0answers
6 views
Conky above full screen
I would like to run an instance of conky on top, that is, to always be visible.
I tried to use
own_window yes
own_window_type normal
own_window_class conky
own_window_transparent no
...
1
vote
0answers
12 views
How to use regular expression to separate numbers and characters in strings like “30M1000N20M” [migrated]
I'm trying to separate the [0-9] and [A-Z] in strings like these:
100M
20M1D80M
20M1I79M
20M10000N80M
I tried using the Python re module, and the following is the code I used:
>>>import ...
1
vote
1answer
22 views
How to display open file descriptors but not using lsof command
Hi I have read Here that lsof is not an accurate way of getting the number of File Descriptors that are currently open. He recommended to use this command instead
cat /proc/sys/fs/file-nr
While ...
1
vote
0answers
12 views
Recursive wget eventually starts failing with “Unable to resolve host” / “Temporary failure in name resolution”
When recursively wget-ting a fairly large site, after downloading 18 MB or so, wget starts complaining "Unable to resolve host" and/or "Temporary failure in name resolution", even though I can look up ...
2
votes
1answer
10 views
How can a bash script detect support for window titling escape characters?
I have a debug trap that runs every time I enter a command in bash that sets the window title to indicate what command is running. I'm leaving out all the configuration details and boil it down to:
...
2
votes
1answer
25 views
SSH host key keeps changing
I am trying to set up a web service (using the Play Framework) on an Ubuntu machine on the network. However, I am experiencing intermittent failures connecting to it, not being able to connect to it ...
2
votes
1answer
17 views
How do I mount an NTFS partition in /etc/fstab and prevent files/directories from receiving exec permissions when they're created?
I have an NTFS partition that I want to mount using /etc/fstab. I don't want any files to have executable permissions on this drive, so I wrote the following rule:
/dev/sda2 /media/sharedfolder ntfs ...
0
votes
0answers
22 views
Existing file can not be found? [duplicate]
/usr/share/tipp10$ ll
insgesamt 9408
drwxr-xr-x 3 myname ssl-cert 4096 Feb 26 20:07 ./
drwxr-xr-x 288 root root 12288 Feb 26 20:07 ../
-rwxrwxrwx 1 myname ssl-cert 9480 Okt 6 2010 ...
0
votes
0answers
15 views
DNS Server error after password change [migrated]
The person who set up our internal DNS utilized an Ubuntu server (10.04) as our primary DNS and a Windows 2003 server as our secondary DNS.
None of the people who set this up are still with the ...
4
votes
6answers
119 views
How can I have more than one possibility in a script's shebang line?
I'm in a bit of an interesting situation where I have a Python script that can theoretically be run by a variety of users with a variety of environments (and PATHs) and on a variety of Linux systems. ...
1
vote
1answer
25 views
What happens when I copy a file from one network location to another
Suppose I have three networked computers: A, B and C.
A mounts a directory from B and from C.
A/mnt/im-on-B/
A/mnt/im-on-C/
A then copies a file:
cp /mnt/im-on-B/file ../im-on-C/
What happens ...
0
votes
1answer
13 views
How to access the Local FTP YUM repo from client Machine
I setup the FTP server on Machine A 192.168.1.105 and created the YUM repo. And placed following contents in it.
#vi rhel-localftp.repo
[rhel-localftp.rep]
name=bla bla bla
...
2
votes
1answer
15 views
How do I route traffic through specific interface for a specific process
I have a script that runs from cron every 15 minutes. The script is meant to ping my DNS server to update a dynamically changing IP. I want this script to ping through the wlan interface and not the ...
4
votes
3answers
266 views
How to cause kernel panic with a single command?
Is it possible to cause a kernel panic with a single command line?
What would be the most straightforward such command for a sudoing user and what would it be for a regular user, if any?
Scenarios ...
1
vote
2answers
37 views
How to run grep and show x number of lines before and after the match
grep returns just the line where it matched the regex and often what I want to really see is a few (say 2) lines above and below the matched one.
Is there a simple way to achieve it?
EDIT:
OS: Ubuntu ...
3
votes
1answer
42 views
Definition of sane
Does sane have a technical definition in a unix / linux context?
I mean in situations such as this:
checking whether build environment is sane... yes
1
vote
0answers
5 views
wvdial connection always shows status disconnected
I use wvdial to connect my usb modem. However, the system always shows "disconnected" as the status. As a result, I cannot use applications which are connectivity-aware. How do I go about correcting ...
1
vote
0answers
14 views
Decrease the font size in Cinnamon from the command line
While I was playing with Cinnamon settings I set the font size to 990 from the font icon available in cinnamon settings. Now I can't use any applications because of the font. It garbles the whole ...
0
votes
1answer
34 views
What is the default jobs argument for make?
How many jobs does make use by default when you don't pass it the -j flag?
1
vote
1answer
11 views
How to edit grub2 to use kdump?
I was following http://fedoraproject.org/wiki/How_to_use_kdump_to_debug_kernel_crashes and in step 2 I need to add the line to grub.cfg, but grub.cfg is a shell I do not know how to edit it, most ...
1
vote
0answers
10 views
Kernel freeze when writing a e1000 driver [migrated]
I am writing a network driver for the e1000 card. While doing the receive part, I saw that the kernel freezes whenever it reaches the netif_rx(skb) call. I was able to reproduce the same error when ...
3
votes
0answers
21 views
Why Nmap fragmented scan is only working on Backtrack?
I spent quite a few hours today trying to capture and study some fragmented IPv4 packets using Wireshark and Nmap security scanner.
I tried a couple of different OS' (Ubuntu and Debian) but to my ...
1
vote
1answer
32 views
Perl CPAN module download fails
The download for the 'App-xml_grep2-0.14.tar.gz' perl module continually fails for me.
cpan http://search.cpan.org/CPAN/authors/id/M/MI/MIROD/App-xml_grep2-0.14.tar.gz
Please login with USER and ...
0
votes
0answers
19 views
FS corruption just a coincidence?
Yesterday I replaced one of the HDDs in my remote server. The setup is simple - Debian Linux (testing), software RAID 5, LVM with 4 partitions on it, home, var, usr, and swap.
I pulled the old disk, ...
1
vote
2answers
59 views
Control how linux deletes files
What exactly happens when an application deletes a file?
Is there any way to control this behavior? Basically I want to shred instead of rm in all cases, but of course applications do not make calls ...
2
votes
4answers
13 views
Capture complete process structure/stack
There are a lot of java processes running on the server, generally, we capture the PIDs of the java processes using command 'ps -ef | grep java'. In general, the java processes have a lot of jars in ...
1
vote
1answer
27 views
How to ssh on multiple ipaddress and get the output and error on the local *nix machine?
command="ls -lrt;uname -a;uname -o"
for i in 10.38.227.229 10.38.164.103
do
ssh auto21@$i "$command 2>&1" >> log
#ssh -n auto21@$i "$command" 2> >> log
done
i am trying ...
1
vote
0answers
12 views
Centos 6.2: Unable to open terminal after vbox save state
I'm experiencing this issue frequently. Usually, I work on my Centos 6.2 in VBox for a while and then close it by saving state (going to other machines or doing host work). Then, I resume my session ...
0
votes
1answer
25 views
Failed dependencies trying to install package 'libxml2'
I am trying to install libxml2, but my system complains about dependencies. The dependent packages exist on system.
The ultimate goal is to install xml_grep2, I have been trying various methods ...
2
votes
0answers
25 views
Using Unison with colordiff
I want Unison to show the diffs with colordiff.
I’ve got diff = colordiff -u CURRENT2 CURRENT1 | less -R in my config file but it seems like Unison pipes the output to plain less nonetheless, so I ...
1
vote
2answers
46 views
Best way to call command within a shell function having the same name [duplicate]
I like to encapsulate commands within shell-functions using the same name. But to avoid the shell-function calling itself recursively, I specify the complete path of the command as the following ...
2
votes
1answer
58 views
SSH causes while loop to stop
I have finally managed to boil down a problem I have been struggling with for a few weeks. I use SSH with "authorized keys" to run commands remotely. All is fine except when I do it in a while loop. ...
8
votes
2answers
214 views
How are the processes in UNIX numbered?
I can't find any pattern when I look at the numbering of PIDs in process table (ps -a), as the PIDs are not subsequent numbers and sometimes there are large "gaps" between those numbers.
Is it ...
1
vote
0answers
18 views
Disable RAID auto detect at runtime
In Linux, I'm partitioning two disks for RAID1 with fdisk. The first disk partitioning succedes, but the second fail because the raid starts automatically and occupy also the second disk (why? it ...
1
vote
1answer
22 views
Set global environment variables at boot in Solaris 11
I am wanting to create a file in Solaris, so that I can export a few "items" whenever the machine is started up.
i.e.
I want to export ORACLE_HOME and ORACLE_SID and some other directories, of my ...
0
votes
0answers
12 views
grub-install from the grub2 shell
I am trying to follow this answer but keep getting stuck with the following errors:
me@greenlane:~$ sudo grub-install --boot-directory=/boot /dev/sdc
/usr/sbin/grub-bios-setup: warning: File system ...
2
votes
2answers
37 views
Extract a column from whitespace-separated fields that are not aligned
How can we extract a column from output in which whitespace is not in a regular format?
For example, when we type ps -ef, it shows all the process, process id's.... etc. How can we get only the last ...
1
vote
1answer
11 views
Xen: Migrating LVM-based machines from Xen Opensource to Xen Cloud Platform
we have several LVM-based VMs running on a Xen Opensource host. "LVM-based", in our case, means that there's a LVM volume for the root partition and another volume for the swap partition. The kernel ...
0
votes
1answer
18 views
Moving Same files from different folders using shell script on AIX 5.4
There are two folders named Folder1 and Folder2.
Folder1 has files with name:For example
S-080001-0-0.xml with its corresponding same files in Folder2 named S-080001-0-0.xml
The change in Folder2 is ...
0
votes
0answers
36 views
`expect`-like behaviour in bash script
I have a script (let's name it parent.sh) that calls some other scripts based on input parameters.
Finally, it calls the script child.sh.
child.sh requests user's input in case it find that some ...
1
vote
2answers
56 views
grep: invalid content of \{\}
Here's the command :
grep '\(2\)[[:digit:]]\{\1\}' numbers
What I want is to match exactly 2 digits after the digit '2', 3 digits if I change the digit '2' to '3' in my expression, 4 digits if ...
...
2
votes
1answer
56 views
Huge page and performance improvemnt
How can using huge page improve performance?
I have read that huge pages improve performance by reducing TLB lookups and reducing the size of the page table. Can someone tell me how this helps with ...
