Before I begin with the question, I just want to point out that I just started learning unix in the middle of last week, so my code (and knowledge of how unix operates) is weak sauce. I took my best stab at this question but it's just not working.
Assignment:
Create a script named 'userprocesses' which will allow you to find all users currently logged on to the system and display the processes they are running. The heading for each user must be their real name not their log in name.
I.e. my login name is lee.ballancore but my real name is Lee Ballancore
The users must not be displayed more than once. DO NOT USE AWK OR SED.
The output should look similar to this.
Lee Ballancore
PID TTY TIME CMD
31799 pts/3 00:00:00 vim
31866 pts/3 00:00:00 vim
2495 pts/7 00:00:00 vim
8368 pts/0 00:00:00 vim
9544 pts/2 00:00:00 ps
Alistairr Rutherford
PID TTY TIME CMD
8368 pts/0 00:00:00 vim
9544 pts/2 00:00:00 ps
Write the output to a file.
-------------------------------------------------
So I spent all day messing around with it, and here's the code I wrote up:
Code:
#!/bin/bash
finger > fingers
a=wc -l fingers
b=0
username=$(finger | cut -d ' ' -f1)
fullname=$(grep $username /etc/passwd | cut -d : -f5) >name
ps -au $username > process
until [ $a -eq $b ]; do
cat name | cat - process
a=$a - 1
done
Hi ,
I am relatively new to unix...
Can u pls help me out to find out if the first day of the month is a working day ie from (Monday to Friday)...using Date and If clause in Korn shell..
This is very urgent.
Thanks for ur help... (7 Replies)
Hi All,
I need to find the previous month last day minus one day, using shell script. Can you guys help me to do this.
My Requirment is as below:
Input for me will be 2000909(YYYYMM)
I need the previous months last day minus 1 day timestamp. That is i need 2000908 months last day minus ... (3 Replies)
I just put together a script for work that will essentially automate the migration of our Windows fileserver to my newly created Debian based SAMBA server.
My script will create the necessary directories then copy the data over to my new server, after that it will set the ACL's by using... (3 Replies)
Hi,
I would like to write a script that checks if a file ('counter') was modified the previous day, if so erase its contents and write 00000000 into it.
For e.g. if the file 'counter' was last modified at 11.30pm on 24th May and the script runs at 12.15am of 25th May, it should erase it's... (1 Reply)
Gey guys,
I'm a new learner of perl. Now I encountered a problem when I tried to get the output below from the input file.
Input:
5'h1f, 16'h8210
write, 5'h10, 16'h0000
write, 5'h11, 16'h0000
5'h1f, 16'hffd0
write, 5'h1e, 16'h0000
5'h1f, 16'h8310
read, 5'h10, rd_data
5'h1f,... (3 Replies)
hii please help me this is the script
num=$1
sum=0
while
do
x=`expr $num % 10`
sum=`expr $sum + $x`
num=`expr $num / 10`
done
echo "Summation is $sum"
it is giving error
pratyush@ubuntu:~$ sh shell.sh 123
shell.sh: 11: 123: not found
Summation is 0 (3 Replies)
Hi!
(I guess this could of gone into the scripting forum, but Unix for Dummies seemed more appropriate. Please note that I am not in school, so Homework doesn't seem appropriate either. You guys can let me know if you think otherwise.)
I am following an exercise in a book on ksh scripting which... (2 Replies)
Hi,
I am trying to write a script that calls an Oracle SQL file who in turns call another SQL file. This same SQL file has to be run against the same database but using different username and password at each loop.
The first SQL file is basically a connection test and it is supposed to sort... (2 Replies)
Discussion started by: newbie_01
2 Replies
LEARN ABOUT BSD
at
AT(1) General Commands Manual AT(1)NAME
at - execute commands at a later time
SYNOPSIS
at [ -c ] [ -s ] [ -m ] time [ day ] [ file ]
DESCRIPTION
At spools away a copy of the named file to be used as input to sh(1) or csh(1). If the -c flag (for (csh(1))) or the -s flag (for (sh(1)))
is specified, then that shell will be used to execute the job; if no shell is specified, the current environment shell is used. If no file
name is specified, at prompts for commands from standard input until a ^D is typed.
If the -m flag is specified, mail will be sent to the user after the job has been run. If errors occur during execution of the job, then a
copy of the error diagnostics will be sent to the user. If no errors occur, then a short message is sent informing the user that no errors
occurred.
The format of the spool file is as follows: A four line header that includes the owner of the job, the name of the job, the shell used to
run the job, and whether mail will be set after the job is executed. The header is followed by a cd command to the current directory and a
umask command to set the modes on any files created by the job. Then at copies all relevant environment variables to the spool file. When
the script is run, it uses the user and group ID of the creator of the spool file.
The time is 1 to 4 digits, with an optional following `A', `P', `N' or `M' for AM, PM, noon or midnight. One and two digit numbers are
taken to be hours, three and four digits to be hours and minutes. If no letters follow the digits, a 24 hour clock time is understood.
The optional day is either (1) a month name followed by a day number, or (2) a day of the week; if the word `week' follows, invocation is
moved seven days further off. Names of months and days may be recognizably truncated. Examples of legitimate commands are
at 8am jan 24
at -c -m 1530 fr week
at -s -m 1200n week
At programs are executed by periodic execution of the command /usr/libexec/atrun from cron(8). The granularity of at depends upon the how
often atrun is executed.
Error output is lost unless redirected or the -m flag is requested, in which case a copy of the errors is sent to the user via mail(1).
FILES
/usr/spool/at spooling area
/usr/spool/at/yy.ddd.hhhh.* job file
/usr/spool/at/past directory where jobs are executed from
/usr/spool/at/lasttimedone last time atrun was run
/usr/libexec/atrun executor (run by cron(8))
SEE ALSO atq(1), atrm(1), calendar(1), sleep(1), cron(8)DIAGNOSTICS
Complains about various syntax errors and times out of range.
BUGS
Due to the granularity of the execution of /usr/libexec/atrun, there may be bugs in scheduling things almost exactly 24 hours into the
future.
If the system crashes, mail is not sent to the user informing them that the job was not completed.
Sometimes old spool files are not removed from the directory /usr/spool/at/past. This is usually due to a system crash, and requires that
they be removed by hand.
4th Berkeley Distribution October 21, 1996 AT(1)