has anyone seen this before, when running an ssh command as normal user via ssh i get results:
ssh picolo 'ls -d /var/sadm/pkg/* | egrep "Prod|Dev|UAT" |cut -d/ -f5;uname -r;grep -v "^#" /opt/Tivoli/lcf/dat/1/DMXAdaptiveFileSystem.dat'>>sshnotroot
and it creates file
more sshnotroot
Prod
5.10
[Code]...
I've been using pipes and redirects for a long time and just realized that I don't know exactly how they are different. I just know that if you want to store the output in a file, then you use >. Otherwise most of the time you just use |. difference between pipes and redirects?
View 1 Replies View RelatedAlthough this is a basic stuff, but still i wonder.
Consider these two examples. code...
I wonder, why doesn't redirection work in first case? when to use redirect and when to use pipes? I have been Linux for a long time, but still this basic stuff baffles me.
File descriptors with pipes-Can someone help me with this three situations, what would happen?
a) a process open the same file twice and read through two file descriptors
b) a process does fork and both parent- and child-processes read parallell
c) two processes opens and read from same file.
In a fresh install of 11.4 I see a file named "1" (the number "One") in the / (root) directory.
Code:
vodoo@host:/> ls -l 1
-rw-r--r-- 1 root root 0 May 31 11:29 1
Who creates this file and what is it good for?
How to create and use named pipe on linux network.ie
client - my linux machine
server - my fren's linux machine
how to communicate between these two using named pipe created in C? do u have any similar code snippet written in C??
i got one server client application,its working fine on my machine.So i want enhance that code for networking.so help in this...
Is there already a program that reads multiple pipes or file descriptors and writes to the standard output (not splitting lines).Like cat, but reading all files simultaneously and preserving lines.It is needed to avoid coding of select/epoll loops or using multithreading in simple programs. Like "select loop for bash".
View 1 Replies View RelatedFor example, I have a script that writes the time to a pipe in /etc/pipe. It writes continuously in a while true loop. How long will the data in the pipe be available for reading? If I only decide to read the pipe a day later with cat /etc/pipe, will I get all the time values right from the time I started writing?
Conversely, what if my loop only wrote the time every 10 minutes. Will I be able to access everything a day later?
Finally, pretend my loop writes the time continuously (like my first example) and I read the pipe every 30 minutes. If my computer shuts down right before I read the pipe, will the pipe be empty when I reboot or will it hold all that data?
I'm trying to redirect nc command output but I can't do it.
I have tried this:
And this:
But it seems doesn't work.
I have two sources of internet which I want to share and balance the load on. With one source it's easy: plug it into the wireless router and Bob's your uncle. But how would you handle two sources and get load balancing? A switch? Would that really share the load?
View 4 Replies View RelatedI need to find one RUNNING word in latest created logs.
and as soon as i will get RUNNING WORD , i have to execute another Unix Command.
I wrote following script code...
see these simple commands:
Code:
# dbus-monitor --system >> /data/eject.txt
This one works as expected ... dbus-monitor never terminates and whenever it outputs new lines, they are
[code]....
recently I had been to interview where I had a question to be answered, that what are advantages and disadvantages when desiging an application in linux.
View 1 Replies View RelatedI have three machines networked to my desktop which run a bunch of simulations in parallel. As they're running, I connect to them via SSH and screen to keep an eye on the runs and look at the output. They stay usually connected for days at a time. The SSH servers and client are running Fedora 14. Yesterday one of my coworkers accidentally yanked the plug on one of the servers while it was running. When I powered it up again, I started getting some odd connection problems. I couldn't connect to it via SSH initially because I got the Remote Host Identification Changed (RSA host key changed) error. I deleted the key in .ssh/known_hosts, which allowed me to connect, but it denied my password. I then logged into that machine locally, restarted sshd, and removed .ssh/known_hosts again. Now I can log in via SSH without problems. However, the connection dies with a "Write failed: Broken pipe" error every few minutes (as opposed to the other two machines, which stay connected indefinitely).
So my questions are:
1.) why would a power loss affect the behavior of the SSH server?
2.) why do I keep getting broken pipes now?
I had just set up nginx on my server. I have PHP and everything working okay. Except when I try the URL
http://xxx.xxx.xxx.xxx/123
I get redirected to
http://_/123
but when I try the url
http://xxx.xxx.xxx.xxx/123/
It works just as I want it to. How can I get nginx to treat the slashless url decently?
exec, a option of find command, takes a odd format as followsfind ... -exec command {} ;Is there any explaination about why it takes this kind of format, orsome obscure implication?
View 3 Replies View RelatedIn this case its the french accented e that is getting translated:[test]$ touch dd touch: cannot touch `351dd': No such file or directory the thing is the folder test is an smb mount. The windows server which is dropping files into it is able to make the file visible but the app running on the linux can't fetch it because the name is 'unexpected'if I create a file anywhere else e.g. in /tmp/ with the name response.txt it is fine. When I ls I see r?sponse.Can you advise me if I should be looking at the smb config AND the host config and give me some pointers as to where to get started trying to solve this.
View 3 Replies View RelatedI've activated my AdSense account and then I received a confirmation from GoogleJust for curiosity, I connected to my server to snoop the logs and I've found a Russian website doing something :|
Code:
66.249.71.215 - - [12/Jan/2011:14:05:58 -0300] "GET /robots.txt HTTP/1.1" 404 1144
66.249.71.215 - - [12/Jan/2011:14:05:59 -0300] "GET / HTTP/1.1" 302 -
[code]....
This puzzling message pops up during startup and forces a reboot:
Code:
Checking root filesystems. fsck.ext3: No such file or directory while trying to open /dev/hda1 The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem, then the superblock is corrupt. This was typed in not copied.
The laptop is running gentoo linux. Here is the fstab file and instead of having "boot" on its own partition I decided to have both "/" and "boot" in the same partition. This has never caused any problems before so I don't understand what the problem is now.
[Code]...
When I run ps fax|grep grep it shows one process like:
How is that possible?
Tried to make a text file and write something in it (a link) quickly as possible, because I was in a rush. So did this:
[Code]...
Now, looking briefly at the output, can't get what's happened lol! I mean, it's html for crying out loud. Not 'scripting' n all. What do you guys reckon has happened?
My mouse cursor has acquired some strange background image showing what looks to be paragraphs of chinese glyphs (they are too small to make out clearly). This background image is contained in rougly a 1 inch square with the mouse cursor hot spot in the upper left-hand corner. The mouse cursor is visible, but whatever is under those glyphs is covered.
I've tried the mouse configuration gui -- but it says nothing of background images for the mouse. I've also deleted and recreated my xconfig.org file to see if that somehow got mangled. I've been searching the web for a couple of hours, but cant seem to find anything related to my problem.
I don't know were this goes so I'm just gonna put it here
Basically earlier today i figured i wanted to try out backtrack 4 but I could only have a maximum of 4 partitions on an hd at a time.
So i deleted my partition that contained my arch home directory (didn't really have any data on it and i figured i could just make a new one later) to create an extended partition to put backtrack on. Well all went well except now when I select arch instead of backtrack i get a disk check error.
This is the first part of the error, I can't exactly copy and paste it as its on my laptop. code...
An old machine in our office, running Ubuntu 6.06 all of a sudden will not boot up. I get the following info during boot:
Uncompressing Linux... Ok Booting the kernel
mount: Mounting /root/sda1 /root failed: No such device
mount: Mounting /root/dev on /dev/.static/dev failed: No such file or directory
[code]....
I haven't changed anything on the system as far as I'm aware, and I ran some HD diagnostics and everything seems fine. however when I try to mount the drive with the following command:
sudo mount -t ext3 -o rw /dev/hda1 /mnt
I get the following error:
mount: wrong fs type, bad option, bad
superblock on /dev/sda1, missing code
page or helper program, or other error
In some cases useful info is found in
syslog - try dmesg | tail or so
I ran fdisk -l and it says the partition type is Linux. The output after running dmesg | tail :
[12207.483801] init_special_inode: bogus i_mode (101)
[12207.483809] EXT2-fs: corrupt root inode, run e2fsck
[12260.427078] init_special_inode: bogus i_mode (101)
[code]...
Update: After running e2fsck -p /dev/sda1, I get the following info:
/dev/sda1: clean, 142449 / 9584640 files, 5402711 / 19161520 blocks
i used opensuse 11.1 ...there is option for root user to create password for root...but for ubuntu i did not find anything like that...so how can i create root password....or how can i use root
View 1 Replies View RelatedI created a chroot jail in /SECURITY/Jail. But when I used the command 'sudo chroot /SECURITY/Jail' to enter the fake root, I got an error message likegroups: cannot find name for group ID 105groups: cannot find name for group ID 119.
View 1 Replies View Relatedi just installed linux mandriva 2009. i set password for root and created a user account. when i try to login as root, after logging out as user, it does not allow me and gives the error "root logins are not allowed". even it does not show the root account. if i try to go to root from konsole terminal using su root, it allows to enter as a root but when i try to start the GUI with startx it gives error.not sure what to do and why i can't see my account in GUI mode
View 5 Replies View RelatedI was trying to edit a file requiring root permissions, so I used sudo. I typed the root password and it failed. This happened three times, and the process was ended. I then logged in as root (su) and was able to navigate to the file and make changes as root. Am I missing something? How would I edit the sudoers file such that this password would work? Or is there another way to log in to the sudo group to make these changes? How do I set sudo passwords?
View 1 Replies View RelatedMy linux distro is CentOS 5.3. Today I edited /etc/sysconfig/readonly-root and set "READONLY" to yes, now my /etc/sysconfig/readonly-root file is like this:
# Set to 'yes' to mount the system filesystems read-only.
READONLY=yes
# Set to 'yes' to mount various temporary state as either tmpfs
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I am trying to install google chrome on my computer, it is in a .deb package and I am using dreamlinux. Earlier today I installed a .cbr/.cbz file reader from root, that was also a .deb and it worked just fine. now I go to install google chrome and it says (Blue is my command, and red is the system response):
I checked under my USER GROUPS and Root is still set as root, and I haven't been using it unless I need to install with it to other directories, Should I be using another command to install? or is it a problem that may affect other aspects of my system? ... My biggest concern is not getting google in, I can wait for that ... I just wanna know why ROOT is under the impression it's not a superuser.