This is due sysfs being pseudo filesystem, as procfs is as well.
It's actually an interface from kernel space to user space which allows you to manipulate various options regarding your hardware or operating system values.
Options such as fibre rescan, ip4 forwarding etc are all controlled by user using those pseudo file systems.
A lot of those options have real backed configuration files (such as /etc/sysctl.conf) which will apply those on boot.
That file system is created after system is booted (or on request) and populated with your device files.
For instance, if you add additional fibre card, a sysfs will be populated with additional hierarchy for that card.
An actual echo command is predetermined, if you issue anything else error will be written.
Take the following example from my PC at home :
Hope that helps
Regards
Peasant.
These 2 Users Gave Thanks to Peasant For This Post:
Thank You very much Peasant.
Hi Leo
Will try cat those files when I reach home. If I remember correctly, i couldn't cat those files even as root.
file command's output from my above post says no read permission too.
Step 1 : In boot file you can add the option
in the call to the current kernel (usually after ro quiet splash).
Step 2 :
Ref: https[://]codeflu[.]blog/2013/04/25/disabling-discrete-amd-graphics-card-in-linux/#comment-280
Hi,
I keep getting this error when i run my script:
No matter how many times i run this rm -rf /siebel/sfs/tmp/dump it succeeds when i expect it only the first time to succeed becoz i expect the second to fail as the directory should be gone in the first run.
i had earlier mentioned... (5 Replies)
Is there any way in a script to print out the commands being ran? In DOS script, there is the "@echo on" and "@echo off".
so I have a script like this:
#!/bin/ksh
echo "hello there. moving files."
<turn on echoing here>
cp thisfile.txt thatfile.txt
cp whatfile.prop whyfile.prop
<turn... (2 Replies)
Hey im new in this...anything will be helpful...
The user will input the word or phrase .... I want to search the user input in file (by lines) but not all then with this line search on another file ( with the specific line) and show to the user.
Example:
file1.txt
=======
a
aa
aaa... (2 Replies)
Hello,
well what I'm trying to do is to remove underscores from filenames and leaving empty spaces instead:
arturas@Universe:/windows/Center/training$ ls
big_file failas su shudu
arturas@Universe:/windows/Center/training$ a=big_file
arturas@Universe:/windows/Center/training$ mv $a `echo... (8 Replies)
Please forgive me if I've chosen the wrong forum... but I'm just wondering how likely it is to find a Linux sys admin with a vast BEA Weblogic skillset or vice versa (a Weblogic admin with vast Linux admin skills)?
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Hi,
I am cutting data from a fixed length test file and then writing out a new record using the echo command, the problem I have is how to stop multiple spaces from being written to the output file as a single space.
Example:
cat filea | while read line
do
field1=`echo $line | cut -c1-2`
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Hi all,
Encountered a wierd behaviour which I am unable to understand.
I have a function doing the follow:
function RETRIEVE_PASSWORD
{
if (( $DC_ACCOUNT ))
then
clear
printf "\nEnter Password for ${ConfiguredUser}"
printf... (1 Reply)
Hi,
I was trying to customize this archaic HP-UX box. only shell available is ksh and that too seems to be pretty old and doesn't completely conform to what I read on the web about ksh. Anyway here are my issues:
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