I have one password text file: username<tab>password, I want to wrote any bash script to check if certain user exist at this file, if did exist print out the password. I get stocked at password value to AWK if block:
#!/bin/bash
FILE="$1"
if [ ! -e "$FILE" ]
then
[code]....
it not work , but if I change toassword=$(awk < $FILE -F\t '{ if (test $1=="JIMMY2") print $2;}') it works, anything wrong $1==$user_name? $FILE is the password file, -F\t is use tab as delimiter.
I want to block a list websites from myself using a password that I don't know.I would randomly generate it or something.Everything revolves around sudo, though, so I don't know how.Long to short: how do I blacklist websites using a password other than my sudo password.
I tried to get a block of lines in awk, but unfortunately it returns output of one line only. I don't state the code here, because it's too short and too poor. What exactly I wanted to do: from file "/boot/grub/menu.lst" get blocks of lines, starting by title and ending by Now I have just
i have a program which have to encrypt data by using a symmetric block cipher with cbc encryption mode . it seems, that the IN data length must be a multiple of the cipher block length. is there a possibility to advice libgrypt to do the padding of the IN buffer automatically or must i do this manually? in case of manual padding: what is the recommended strategy to perform high security? fill with zeros or random numbers
How do you go about getting the raw size of a block device under Linux from within a C program? And I mean the raw size of the block device itself, not a file system that may or may not be installed on it. And I'd like to be able to get the raw size of any block device, from hard drives (e.g., /dev/sda) to LVM partitions (/dev/mapper/vg0-home) to loop devices to anything else that is a Linux block device.
I'm setting up a machine that's going to be used to test randomly connected tape drives one at a time, and as such, I'm writing the test routine using mt in a bash script, for user-friendliness. The problem is the block device name changes on occasion as tape drives are swapped out and busses are rescanned, so I can't "hard code" a block name into the script.
I know programs like lsscsi and hwinfo will give you block device names as part of their output, but I can't seem to grep anything in such a way as to have the final output be just the block name (ie /dev/st2, or optimally 'st2'), so that I can just have the script read said output, and drop it into the necessary variable.
I have a write call to a ttyACM serial device that blocks after several hundreds bytes are written.I'm writing in ~25 byte chunks, so I have 5-8 successful writes, then the next write blocks forever.I can bypass the blocked call using select, but I can never call write again without closing and re-opening the port.
The serial port is opened correctly because I can read from it just fine. Write permissions are correct, and it's opened RW.The code is likely correct because I tested the same code using the same device on a pure RS-232 serial port, and it worked fine - no block. Is there anything to know about the linux ACM module?It's my understanding that write calls basically shouldn't block.They're supposed to return -1 if there's an error.
What I want to do is from a file having block like
<event> 8 3 0.2685416E-02 2 -1 0 21 -1 0
[code]...
The first line after the "<event>" is its process-id, so I would like to have at the end a summary of how many "event" block I have for each type, ie how many
6 1 0.2685416E-02
or how many
7 2 0.2685416E-02
etc etc
I do not know in advance how many different-kind of block I will have, so it has to be a bit smart to scan the file, and make an new "summary" info for each unique type I was using something like
I want to know how much CPU time spent on CODE_BLOCK. Since the process executing CODE_BLOCK may be preempted during execution, this CPU time may not be equal to the (wall-clock) time elapsed from the beginning of CODE_BLOCK to the end of it.
I have a clump of text that needs to be broke up:gdbm Sat 07 Feb 2009 03:28:18 AM EST libattr Sat 07 Feb 2009 03:28:18 AM EST db4 Sat 07 Feb 2009 03:28:19 AM EST mktemp Sat 07 Feb 2009 03:28:19 AM EST keyutils Sat 07 Feb 2009 03:28:20 AM EST pcre Sat 07 Feb 2009 03:28:21 AM EST setserial Sat 07 Feb 2009 03:28:24 AM EST zlib Sat 07 Feb 2009 03:28:24 AM EST gawk Sat 07 Feb 2009 03:28:25 AM EST readline Sat 07 Feb 2009 03:28:26 AM EST rhpl Sat 07 Feb 2009 03:28:28 AM EST cracklib-dicts Sat 07 Feb 2009 03:28:37 AM EST setools Sat 07 Feb 2009 03:28:37 AM EST hal Sat 07 Feb 2009 03:28:38 AM EST which Sat 07 Feb 2009 03:28:39 AM EST Is there a way to get everything after the EDT in the text to be moved to a new line?
In one of our core dump we have the followings in the core back trace:
#0 0xb77bf947 in raise () from /lib/tls/libc.so.6 #1 0xb77c10c9 in abort () from /lib/tls/libc.so.6 #2 0xb77f56ba in __fsetlocking () from /lib/tls/libc.so.6 #3 0xb77fcf7f in mallopt () from /lib/tls/libc.so.6 #4 0xb77fd022 in free () from /lib/tls/libc.so.6
It occurred in a memory block free operation. From our analysis, there seems no issue relate the the memory block it self. The memory pointer pointed to the right memory block to be freed and the contents of the memory seems right (not corrupted), in one world, there is nothing obviously wrong. Does any one have any ideas what could be wrong when seeing about?
I am going to create a parent process and fork a child process from it. I want to write a code in such a way that whenever my child process end it must indicate that the child process is terminated by a signal or not. This code must be written in the parent process block.
Just installed Debian 8 last night and trying to run one a few of my scripts that use easygui (a front-end for python-tk basically) and I keep getting alloc: invalid block any time a file or folder selection dialog is presented. I'm able to select a file/folder with no issues, but once the dialog closes I get a variation of what appears to be a memory error followed by alloc: invalid block.
Here's one of my scripts that does it. This one pops up a file selection dialog pretty early on to ask for a file to check, and as soon as I select any file the dialog closes and that error appears in the terminal. It happens whether I run it with Python 2 or Python 3. You will need to install python3-easygui for this script to run properly if you want to check for yourself what happens. This is a first time encountering this error for me.
algorithm:breada input: file system block number for immediate read file system block number for asynchronous read output:buffer containing data for immediate read { if(first block not in cache) { get buffer for first block if(buffer data not valid) initiate disk read } if(second block not in cache) { get buffer for second block) if(buffer data valid) //line 1 release buffer else initiate disk read //line 2 } if(first block was originally in cache) //line 3 { read first block return buffer } sleep (event first buffer contains valid data) return buffer }
Here is an algorithm for block read algorithm. I have problem in line 1: If buffer data is valid why is it releasing the buffer? line 2: If buffer data valid why is it initiating disk read. It should have read directly from buffer? line 3: It should be the first condition as if it is there in cache then it should return it without delay?
I wanted to know how can I set a period of time to a tcp connection to wait for request or respond for tcp block read. which system call or function I can use? Does any body know a very simple quick and easy reference on web for socket programing that has lots of socket programing examples in it?
I am trying to find sed command combination to print out the "start command" line, the id line and all lines between "details" and "stop command" only if "error" exists. Here's the original output (test.txt):
hello i am trying to change my password, but when i type in the new password i get this:"The password is longer than 8 characters. On some systems, this can cause problems. You can truncate the password to 8 characters, or leave it as it is."my question is what kind of problem could i get and how can i change so i have to log in every time i start the computer?
I'm writing a script which will log into a list of servers if they have public/private keypairs set up. If a server doesn't, I want the script to move on to the next server rather than wait at a password prompt.I'm using OpenSSH version 5.1p1 Debian-5, OpenSSL 0.9.8g 19 Oct 2007 on both client and server.I'm using this command: Code: ssh root "at" "IP" -o PasswordAuthentication=no KbdInteractiveAuthentication=no I had to write "at" instead of the symbol, as I'm not allowed to "post URLs to other sites after you have made 15 posts or more."This works for most servers, but not all (on some of them the script halts at a password prompt). I suspect those servers may run an older version of SSH which doesn't support the options I'm providing
I want to automate one script which involves the ssh to other server using another user and then execute command. I want it to be unattended. But now when I ssh it prompts for the password. Is there any facility where I can provide password to the script and and script will run without prompting?
I have a script which when invoked will generally su into being a number of different users (for those that have read other threads from me, you will know.I am building my own user based package management system).Whilst 75 - 80% of the time there will be no need to be anyone other than the original user, there are times when the root password is required. Currently this is presented to the administrator at exactly the point in the script that it is required.At times this may be more than once and it may also happen for multiple users in a row.
What would be the best / safest method (in your opinion) of capturing the password at the start of the script and then delivering it when required?I have looked at expect ( I am not at all familiar ), but on the examples dealing with passwords, that I could find, they all seem to store the password in a simple bash like variable (which does not excite me at all from a security point).I can also potentially go down the sudo road, but the issue here is that I would either have to find a list of commands that an entire group can have access to without passwords (doesn't sound safe) or I am back to square one of then requiring a password for each individual user to be entered, which if at the start would still need to be captured and saved until necessary.So as I have said, I am open to any and all (constructive) advice
I'm working on a program that will allow non-privileged users the ability to substitute passwords that are read in from a 600-root:root file. A user might call it like this: /bin/securepasswrapper "/path/to/check_ping -u Admin -p ?webserver1?"
The file (defined now as /tmp/securefile) will be searched for the identifier "webserver1", and it's corresponding password will be returned to securepasswrapper. Now, I know you could just call /bin/echo, and get the output, but that's in scope at this point. File format of securefile is: <identifierassword> ex: webserver1:asdf123
Once the password is properly substituted in, securepasswrapper should then execute it as the UID/EUID of the calling user (not root)...that part I've not got to yet. Code: /* program: securepasswrapper author: R.Briggs + Google date: 02/02/11 purpose: C wrapper that replaces placeholders in a string with secure passwords retrieved from a file */ .....
