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i'd like someone to explain me the meaning of the code below:
sort -t: +0 -1 /etc/passwd

when i'm running this at terminal it prints me all the contents of /etc/passwd file.
maybe it sorts them...

oh thank you very much!

Hi!
i want to extract from /etc/passwd file,the user and user info fileds, to a another file.I've tried this:
cut -d ':' -f1 ':' -f6 < file
but cut can be used to extract olny one field and not...

thank you very much,both of you!

thank you very much!!!
ah!i think i've seen this command again but instead of '2s' was "1.5s"
is this possible?

ok..i got it...'3d' in sed means delete the third line....and i thank you for this..
if i had sed in this form what this could mean:
sed '2s/home/george/' filename
whats the meaning of the '2s'??

maybe the command
sed '3d' filename
if i write it somewhere in my script replaces the sting '3d' withe the contents of the filename?

ok i got this about the tr command...
but what about the first command with sed and the second with sort?can you explain me these please?

thank you very much!!

i wrote this shell command:
grep '^root' /etc/passwd
when 'root' is in the begining of line.
the output is :
root:x:0:0:root:/root:/bin/bash

can someone explain to me what's the meaning of...

Hi!
i'd like from someone to explain me 'what is what' from these parts of code if it's possible.i'd like to understand them and their usage:
1)
sed '3d' filename

2)
sort –t: +0 -1 /etc/passwd...

no corona!i'm trying to explain to methyl what outputs cames from my code!i haven't tryied it yet!i'll try it though!thanks for the reply!

it outputs nothing at all...but without grep i can see the pid and the %cpu collumns..i cant understand why is this happening...

im using this code below
clear

ps -e -o pcpu,pid | grep \^"0.00" but this outputs nothing at all!only if i delete grep command its running properly, ps -e -f pcpu,pid !!! :@@@
why is this...

hi!
i wrote this script(ubuntu os):
clear

echo "number of running processes"

ps -ef | wc -lbut i can't get the number of my currently running processes...
is there a way to see HOW MANY...

thanks methyl!i just wanted to see if that was possible with these simple commands!thanks again!

yeah i'm sorry!i mean the list of users...sorry!what about ls command or cat to get the list of users?is it possible?

thanks a lot for your reply!maybe i didn't wrote what i want properly sorry for my bad english...my main problem is how i can use one of the commands(ls,cat,grep(or egrep)) to get the users in...

Hi!
i've been searching a way to display the users who are in the /etc/passwd directory...using ls or grep or cat command should do it?i can't find a way to get this right..i mean none of the...

ok!thanks a lot for that!

isn't ps command enough for outputing my processes?
the command(assuming my login is straw like you said) ps -fustraw is more appropriate?or i will get the same ouput?

ok i get it!with this the output will be a list with processes with zero %cpu the name of the user and the pid of the process...and with grep (and the \^ before grep) we can get the columns with...

i have solaris on my pc and the latest version of ubuntu at the other pc(the one i'm using right now)...like i said i'm trying to write a shell script or better i want to learn how i can write a...

thanks a lot!!

thanks a lot guys!
but how i can get the list of groups?