I want to write a shell script file for the below subject
subject / situation : i have many users say user1, user2, user3, user4 and so on... within my /home dir
Within a user dir say.. /home/user1 i have many unwanted files. these unwanted files start with the name core for eg. core2324, core9789, core 9079 etc.. i need to delete them.
I want to write an automated script for this, which can do the same. How to write a script which can delte these unwanted core files which exist in all user dirs.
When I ls -l /etc/passwd, -rw-r--r-- 1 root root /etc/passwd When I login as myself, and rm /etc/passwd, it asks: rm: remove write-protected file '/etc/passwd'? If I say yes, will it actually delete the passwd file?
I'm writing a script/plugin for Nagios for testing a WebLogic server.. I redirect some output to a file, and then i read that file to get some data, but i can't seem to write to that file with my script :s... this is the most important code
[Code]...
* EDIT * When i execute this script through a local terminal (PuTTy), it works but when i execute it from Nagios, it doesn't work..
I want to keep a trace of the URL I visit, so I use a command line like this:
tcpdump -ien1 -v -X 'tcp port 80' | sed -nl 's/^.0x[0-9a-f]{4}:.{43}(.)$/1/p' |perl break.pl |perl -pe 's/(GET|POST).(.*?).HTTP/1....Host:.([a-zA-Z._0-9-]*)../" BEGURL
[Code]....
I also tried redirecting stdout and stderr to /tmp/out, it's still empty. The file has write access. I have no idea what it can be. Is there anything else than stdout and stderr?
What are the possible problem when Windows access the file from Ubuntu got Read Only even though have a full permission to read, write and execute the file? Ubuntu to Ubuntu accessing the file there is no problem only Windows got a problem.
I am trying to write a C++ Code to read write a XML file in C++.I researched a lot and find xerces is used for that but I am not able to write the code for that.Please provide me some links on how to run a code that R/W a xml file in C++.
I need to copy a file into a Flash memory which is connected to my computer via USB. The file must start at a specific sector. Can anyone guide me how to do this? (it can be through a C program, a line command, or any other way)
Debugging some of my scripts after upgrading from Debian Lenny to Ubuntu 10.04. In so doing, I tripped over this "problem," the solution to which may give me a clue to others.
On a bash shell command line I created a file thusly:
sudo touch zero_file
and it lists as expected with default permissions 0644:
I can place the command (minus the "sudo") in a script & run it under the auspices of sudo & it works. Am I missing something re the stdin redirection when using sudo?
How can we write a file and display in terminal at the same time. Like for example, when I do.. php -f file.php > testfile That should save right.. but I want to display it in terminal otherwise.
I have a program that is very heavily hitting the file system, reading and writing randomly to a set of working files. The files total several gigabytes in size, but I can spare the RAM to keep them all mostly in memory. The machines this program runs on are typically Ubuntu Linux boxes.
Is there a way to configure the file system to have a very very large cache, and even to cache writes so they hit the disk later? I understand the issues with power loss or such, and am prepared to accept that. Crashing aside, in normal operation the writes should eventually reach the disk!Or is there a way to create a RAM disk that writes-through to real disk?
I own a particular file on a Linux system. I would like to give 2 groups (accounting, shipping) read access and only read access, and 3 users(Mike, Raj and Wally) write access and only write access. How can I accomplish this?
I'm having this problem wherein the ppp program is altering the /etc/resolv.conf file when connecting.This, despite me having set file permissions to read-only. What could be the problem here?
I want to write a bash script to parse a text file with the following lines and set variables for each line so that I can use them in the rest of the script.
Timestamp=123456789 Company=ABC Company Server=Server Recipient=Joe Smith Email=joe@abc.com
simplest way to read each line one at a time for everything before the =, set that to a variable name with the value equal to everything after the =
remove a line starting with specific word with grep. Here is what I found
grep -v '^cc$' data.txt
Here I remove all lines with on 'cc' in that line. But I want the result write back to data.txt
I try several ways
grep -v '^cc$' data.txt > output.txt # works but to another file echo `grep -v '^cc$' data.txt` > data.txt # didn't work, all carets gone, become one line grep -v '^cc$' data.txt > data.txt # data.txt is empty after running this
How can I save the result of grep to the input file?
I just noticed on my Ubuntu machine (ext3 filesystem) that removing write permissions from a file does not keep root from writing to it. Is this a general rule of UNIX file permissions? Or specific to Ubuntu? Or a misconfiguration on my machine? Writing to the file fails (as expected) if I do this from my normal user account.Is this normal behavior?Is there a way to prevent root from accidentally writing to a file (Preferably using normal filesystem mechanisms, not AppArmor, etc.)
I understand that root has total control over the system and can, eg, change the permissions on any file.My question is whether currently set permissions are enforced on code running as root. The idea is the root user preventing her/himself from accidentally writing to a file. also understand that one should not be logged in as root for normal operations.
How do i disable the linux file cache on a xfs partition (both read an write).
We have a xfs partition over a hardware RAID that stores our RAW HD Video. Most of the shoots are 50-300gb each so the linux cache has a hit-rate of 0.001%.
I have tryed the sync option but it still fills up the cache when copinging the files. ( about 30x over per shoot :P )
I've been trying out qemu to play around with some VMs. It's working well but I keep wanting to be able to view the text (linux boot process) that quickly scrolls by in the qemu window on startup of my linux virtual machine. Is there any way to retrieve this via qemu?
I want to write expdp output in a text file using a shell script
If i write like below:
It will write whatever is there in log file to text file
But, sometimes export fails with out start taking export (without generating log file) because of job already exists error. such times, we dont know about that error until we check manually... so i wrote like below:
But still it is not writing anything in to text file using above stmt...
I have two linux servers, they are backup together.
1. Server 1 have 3 files with name: file1, file2, file3 in the path: /etc/sysconfig/network-script/.
2. Server 2 have 3 files with name and path are the same as server 1.
- How to make a script to copy 3 files at server1 to overwrite on server2. But before overwrite, this script will check and compare the last modified date of these 3 files(on server1 and server2). if the modified date of file1, file2 or file3 on server1 is newer than 3 files on server2 then overwrite process will do, if not, will do nothing.
- see my script as below: it works find now but just overwrite. not check last modified date.
I have a text file that contains a single word and I want to write a bash script that will read the word from the text file... The following is my incorrect attempt, as it assigns the name of the textfile to the variable as opposed to the word stored within the textfile:(assume I have a text file value.txt that has its contents a single word, say wordone)
Code: #!/bin/sh for f in value.txt do echo $f done
so the output of the above script is value.txt, however I want it to be wordone.to summarise: how do I assign the value of the word contained within a textfile to a variable?
