General :: Memorize The System IRQs Number Columns 0-15?
Mar 20, 2011
I'M working my way through Trainsignal's CompTIA Linux + Training course and I have a question about IRQs. According to the lesson using the command "cat /proc/interrupts", I need to memorize the system IRQs number columns 0-15. But when I use this command, I get somewhat of an unordered list, see below.
Code: cat /proc/interrupts
CPU0 CPU1
0: 48 7 IO-APIC-edge timer
1: 247 205 IO-APIC-edge i8042
[Code]....
View 1 Replies
ADVERTISEMENT
Mar 4, 2010
if there's a tab-delimited file under /usr/desktop, how can I determine the number of rows and columns of the file in shell?And, if told the the 3rd column of the file contains only numerical values and all values in the 5th column are unique, how can I verify these in shell?
View 13 Replies
View Related
Jul 18, 2011
In linux terminal; how can we get the number of rows ad columns from linux kernel? I tried from environment variables(LINES,COLUMNS) but, I could not retrieve them as my editor program is a child process to linux terminal process.
View 7 Replies
View Related
May 19, 2010
If you create a file on UNIX/linux with special chars, like touch "la*, you can't remove it with rm "la*. You have to use the inode number(you can if you add the before the name, I know, but you'd have to guess as a user that it was used in the file creation).
I checked the manpage for rm, but there's no metion of the inode number. Doing rm inodenumber doesn't work either.
What is the command for this?
View 4 Replies
View Related
Feb 18, 2010
What is the user account number when you create a root user account for the system during the installation of any linux distribution? I'm not sure if its 0, 1, 10, or 100..
View 2 Replies
View Related
Oct 1, 2010
how to get the card number and device number on system for attched USb audio device?
View 3 Replies
View Related
Apr 9, 2010
I need to organise an external HDD such that there is no more than 500 folders on it.
Ubuntu's "Properties" pane shows only the file count, not the folder count.
Is there a simple CLI line that will tell me the number of subdirectories?
View 3 Replies
View Related
Sep 22, 2011
On my system (OpenSUSE 11.4 - kernel 2.6.37) ifconfig indicates different interrupt number for eth0 than proc aqd sys file system.
ifconfig indicates 17:
proc fs indicates 43:
sys fs indicates 43:
Relevant part of lspci -vv output for irq 17 (this belongs to wlan0 and not to eth0):
Relevant part of lspci -vv output for irq 43:
View 1 Replies
View Related
Aug 15, 2010
Everyone who deals with Linux knows that partitions on hard drives are designated as "sdx#", i.e., sda1 sdb2, etc. I know through experimentation that the number portion of the designation is assigned not according to order on the disk, but chronologically in the order they are created.
Further, if you have several partitions on the disk-say, sda1 through sda3-and you delete sda2, the designation of sda1 will remain the same, but sda3 will become the new sda2. The creation of any further partitions on the drive will start with designation sda3 and increment from that point.
At times this creates a conundrum, especially concerning bootable partitions. Some time back I rendered a partition containing OpenSUSE unbootable because of this, even though Ubuntu owned the GRUB bootloader in the MBR. Ubuntu's GRUB could find and point to the partition using the command "sudo update-grub", but when OpenSUSE took over the boot-up process, its GRUB was pointed to the wrong partition and would freeze up.
My question is this:
Under Windows, one is able to make a Drive letter persistent. Windows will keep the drive letter for that partition and assign around it. Is there a way to change a drive designation number, or at least make it persistent, under Linux? It would be a handy method to forestall these types of booting problems, among other things.
Presently, when a person has installed Linux side-by-side with Windows and want to delete the Windows partition and expand the Linux partition into the free space, I will tell them to format the partition, then shrink it to next to nothing instead of deleting it. This preserves the partition ID scheme while giving them the space to expand their Linux partition into...especially helpful with a seasoned Linux installation that would be a PITA to reinstall and set back up.
Oh, and I already know about UUID. This article explains it, but if you look down through the comments, you will see reasons that it is problematic for desktop application and usage. I want to make it as simple as possible for new Linux users (and myself! ).
View 4 Replies
View Related
Aug 25, 2010
i am one gnome-user, but need to set up kde/Kubuntu/Mint 9 KDE on my wifes computer. So, i have few questions:
1) how to make kde not to start/memorize previous session after reboot?
2) in gnome-power-manager i can read Battery Health (mAh, Design Capacity...)-something like that in KDE? In KDE Power manager i have no such readings.
3) is there some cleaning tool as for gnome ubuntu-tweak?
View 5 Replies
View Related
Dec 15, 2010
1) I got a dual screen and I can drag applications on screen No2. But if I log out, reboot or close the application, it will go back to screen No1. Is it possible to memorize the position of an application on Screen No2?
2) I use workspace a lot. I like to split them by function. I got "Development": Netbeans, firefox (one on each screen), "communication": Evolution, gwibber, empathy (Evolution on 1 and the rest on 2) and "Entertainment" (anything not involving work)Every morning, I have to move my applications to the diferent workspace. It would be great if on startup they just go where I told them to be!
View 1 Replies
View Related
Mar 29, 2010
I am trying to write a script which compares a log file with reference file. The log file has a table, the LHS of the table are constants strings and RHS of table values changes if there are any changes in configuration.code...
Here I am looking for a script which compares test.log file ( whose RHS data-types are known prior whether it is digit or string) with test.Ref which is reference file for test.log file. It will be really helpful for me if any of you give some idea about writing this script.
View 2 Replies
View Related
Aug 18, 2010
I am having a souce file (say SOURCEFILE) as below with 5 columns and many rows.
pol name status loan address
123 aaa 21 100 RJY
234 bbb 31 200 RMY
345 ccc 21 300 SJY
456 ddd 41 400 pqr
i want to compare the file (say COMPAREFILE ) which is below :
123
345
I need the following output file (sayOUTPUTFILE) as below :
( ie for file COMPAREFILE i need column 2, column 4 ie name and loan from source file )
ie output file required is to be like below :
123 aaa 100
345 ccc 400
Till now iam using the following method.
1. cutting column 2nd column
2. again cutting 4th column
3. in third, step merging the 2nd and 4 th column.
method of writting single line command or any awk programme to do this in one step.
I need output file (say OUTPUTFILE) as below
View 1 Replies
View Related
Oct 10, 2010
I have three files with the following structure:
file1
1 2 3 4
5 6 7 8
[code]...
View 4 Replies
View Related
Jan 28, 2011
I'm working on a midrange NAS system basically running on Linux and I got to do some great testing today. The step-by-step lead me to using fsdb to corrupt the magic number on a file system in order to corrupt it / test the script that should fix it.
View 1 Replies
View Related
Jan 20, 2011
I have a text file with 2 columns. Column A has 69,000 rows. Column B has 49,000 rows. Column A has our complete product list Column B has product list from Manufacturer 1 There are only certain/some rows which are common between 2 columns. and also, column B is not a subset of column A. Column A has extra entries and so does column B. I need to know, which rows from Column B, are common with Column A which rows from Column B are not common with Column A. Essentially I want to know from this list, how many of our products are from my manufacturer 1, how many does my manufacturer has which we dont carry.
How would I acheive this? My natural approach to solving this kind of obstacle is to reach for MS excel and use its lookup function, but its not working... Its taking forever and hanging up. since the file is so huge and probably my excel skills are really bad.
How can I do this from command line? I am looking for awk command if possible instead of sed since I am trying to pick up its syntax and usage etc. My thought process is, sort column A,B, for every row in A, lookup and output based on condition. Dont know if I am on the right track.
View 7 Replies
View Related
Sep 22, 2010
I'd like to extract a single column from 5 different files and put them gether in an output file. I saw a similar question for 2 input files, and the line of code workd very well, the code is:awk 'NR==FNR{a[NR]=$2; next} {print a[FNR], $2}' file1 file2I added the file3, file4 and file5 at the end, but it doesn't work. Does anyone know what do I have to do?
View 5 Replies
View Related
Dec 20, 2010
I want to merge columns (selectively) from several files and create a new file with the merge output. I saw some suggestions to use pr/paste to join the columns and then awk to pick-up the columns.
Code:
pr -m -t -s file1 file2 | gawk '{print $4,$5,$6,$1}'
But I have hundreds of files and I cannot manually pick up columns using awk as given in
[code]....
View 14 Replies
View Related
Jul 29, 2011
I would like to transform rows into columns from a file in bash.
View 4 Replies
View Related
Jun 2, 2010
I'm pretty sure this is super simple, but I've searched and searched and for the life of me I can't find any info on how to limit the columns that display in the interactive top program with arguments passed from the command line. I recall seeing something formatted like this ...
~/top -f (kdx)
Which would only show the %CPU, UID, program name fields/columns. I'd like to display the results in a really narrow terminal window on the right side of my desktop.
View 5 Replies
View Related
Mar 21, 2011
I have an ASCII file containing 3 Columns of descending data as flollows:
3277.233 | 9.032167E-16 | 5.354040E-16
3276.725 | 1.825813E-15 | 7.552098E-16
3276.211| 2.472245E-15 | 8.826818E-16
3275.699| 2.943001E-16 | 3.192112E-16
[Code]....
I want to sort them in ascending order.
Does anybody know how to do it in Ubuntu 10.4.
View 5 Replies
View Related
Jul 13, 2011
I am running the command on a Mac but due to it being a generic unix command and a command line query.. I thought I can write on this forum.. I am running the command
Code:
df -h | grep '/dev/'
I get
Code:
/dev/disk0s2 389Gi 62Gi 327Gi 16% /
/dev/disk0s3 76Gi 24Gi 52Gi 32% /Volumes/Backup
/dev/disk3s2 500Gi 47Gi 453Gi 10% /Volumes/Misc
Note the huge space between the 1st and 2nd Column..
This is because currently I have some NAS drives mounted which are not showing due to grep. When they are not mounted. The output is fine with equal spaces between each column (like between col 2 and 3.. or 3 and 4). I want to do a (dare I say) sed or awk or something to reduce the space between 1st and 2nd col. So that it has space like between col 3 and 4.. or 2 and 3. This is because I am showing this output somewhere and because of the space its not showing up correctly.Also I hope the command will still work when the NAS drives (afp) are not mounted.. basically consistency. The spaces are not showing properly in the quote tag. Changed it to CODE tag.
View 12 Replies
View Related
Sep 28, 2009
as a result of a find command, i have
852065 72: /bin/gunzip
852065 72: /bin/gzip
852065 72: /bin/zcat
(the first column is inode number and the second is size if you're curious)
I want to be able to format it in a way such that:
852065 72:
/bin/gunzip
/bin/gzip
/bin/zcat
I know I can get the bottom half using awk- but I can't figure out how to extract the first set of numbers and get them to appear only once
View 9 Replies
View Related
May 21, 2011
Why does unix ps -l whows one number in column "PRI" but in same time ps -o pri shows another number? cpu and nice are zero for those processes
View 1 Replies
View Related
Jul 27, 2011
I've searched everywhere and I can't come up with a good solution. For each line I need to find the average, min, and max. I've seen plenty of solutions where the number of columns is fixed, unfortunately for me these lines can get pretty large. My thought was to read each line individually into an array, loop through the array and find the avg, min, and max that way but i haven't had much luck. I can read each line using a while loop but I'm having trouble with the array part, or perhaps that's not the best solution?
View 14 Replies
View Related
Aug 2, 2010
I am looking for statistics on the number of people who use RHL in comparison to other linux distros. Any help on finding up to date numbers?
View 1 Replies
View Related
Dec 30, 2009
I'm the POC for all my families Linux computers. Is it possible to get statistics on which programs are accessed, how frequently, for how long and by which user?
When it comes time to upgrade it would be useful so I know which programs to concentrate my testing. I usually just e-mail and ask but every time people forget to send me the programs they actually use.
View 2 Replies
View Related
May 20, 2010
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?
View 5 Replies
View Related
Apr 7, 2010
I am trying to get the count of number of CD-ROMs attached with my Linux system using a bash shell script. I have decided to use the following method for it:
Code:
debian:~# cat /proc/sys/dev/cdrom/info | grep "drive name:"
drive name: sr0 hdb
So basically I know that there are two CD-ROMs attached to the system. Now there can be three also like this:
Code:
debian:~# cat /proc/sys/dev/cdrom/info | grep "drive name:"
drive name: sr0 sr1 hdb
All I want to do is in my shell script to get the count of the devices in a variable using the above command.
View 2 Replies
View Related
May 9, 2010
any software which could memorize all command typed in Linux box, in addition to 'history' command something like:
user:user1 date: 10.10.10 command typed: ls
user:user2 date: 10.10.10 command typed: pwd
View 6 Replies
View Related
