10-09-2001
Quote:
Originally posted by primal
why did you double cut?
name_t=`grep ^${1} /etc/passwd | cut -d: -f5 | cut -d, -f1`
The reason I did that, was that some of the GECOS fields in my test passwd file are comma delimited. If the User's name is the only information that field is simply -
:Full Name:
In the case that It contains phone number, office number, so on, it looks like this -
:Full Name, Room Number, Work Phone, Home Phone:
I wanted to make sure that if more than one part of the field existed, we only grab the full name.
oh and the 2>&1 is?
who | grep $1 >/dev/null 2>&1
Oops, forgot to explain that. "2" is the file desciptor for "stderr", which is the standard error output. "1" is the descriptor for stdout, standard output. Some times you need to do something with both of them, to keep any output from showing up on your screen. What 2>&1 does, is sends stderr into stdout, so it will follow wherever you're sending the output, whether it's into /dev/null, or into a log file.
I may not be too helpful in explaining it here, but in this case, you probably don't really need it in this case. It's just one of those things I do out of habit...
thanks! im gonna read some more.
-primal
Hey, any time!
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi
I have a file with the records
1 A B C D
2 E F G H
3 I J K L
4 M N O P
In the ouput I want
1 A B C D 2 # F G H
3 I J K L 4 M N O P
How to achieve this? (10 Replies)
Discussion started by: superprg
10 Replies
2. What is on Your Mind?
Same as the Title!
:) (2 Replies)
Discussion started by: ripat
2 Replies
3. Shell Programming and Scripting
Moderator, kindly delete this thread because I already found what I needed... thanks. (0 Replies)
Discussion started by: Deanne
0 Replies
4. Shell Programming and Scripting
Hi Everyone,
i have a string 00:44:40
so:
$tmp=~ s/://gi;
$tmp=~s/({2})({2})({2})/$1*3600+$2*60+$3/e;
the output is 2680.
Any way to combine this two lines into a single line?
Thanks (4 Replies)
Discussion started by: jimmy_y
4 Replies
5. Shell Programming and Scripting
I am learning to build from SVN and other tools, with a lot of copying and pasting from forums. I like to append && echo "success" to all commands so that I can see at a glance if things went all right. Is there a way that I can have the bash shell append this to all commands?
Thanks! (5 Replies)
Discussion started by: dotancohen
5 Replies
6. Shell Programming and Scripting
Hi - Within perl I want to execute a system command. I want to re-direct all the output from the command to a file (@result = `$cmd`;), but I ALSO want the results to be displayed on the screen (system("$cmd");
The reason is this - if the command completes, I want to process the output. If the... (6 Replies)
Discussion started by: jeffw_00
6 Replies
7. Shell Programming and Scripting
Hi,
I have a file like this:
"sdfc@abc.com","arovls","some addr
", "more stuff"
"ssss@email.com","arovls","some addr", "sss"
"edx@email.com","arovls","some addr", "sssdfvv"
"ssss@a55.com","arovls","some addr", "lsdsdgf"
"ssss@0234.com","aro
vls","123
Main", "lSdfv"
I want to... (4 Replies)
Discussion started by: erniel
4 Replies
8. Shell Programming and Scripting
Hi Guys,
I have two input files and I want to combine them and get the unique values and differences and put them into one file. See below desired output file.
Inputfile1:
1111111
2222222
3333333
7860068
7860069
7860071
7860072
Inputfile2:
4444444 (4 Replies)
Discussion started by: pinpe
4 Replies
9. Shell Programming and Scripting
In the awk below, what I am attempting to do is check each line in the tab-delimeted input, which has ~20 lines in it, for a keyword
SVTYPE=Fusion. If the keyword is found I am splitting $3 using the . (dot) and reading the portion before and after the dot in an array a.
If it does have that... (12 Replies)
Discussion started by: cmccabe
12 Replies
10. Shell Programming and Scripting
I have been searching and trying to come up with an awk that will perform the following on a
converted text file (original is a pdf).
1. Since the first two lines are (begin with) text they are removed
2. if $1 is a number then all text is merged (combined) into one line until the next... (3 Replies)
Discussion started by: cmccabe
3 Replies
LEARN ABOUT HPUX
bos_exec
BOS_EXEC(8) AFS Command Reference BOS_EXEC(8)
NAME
bos_exec - Executes a command on a remote server machine
SYNOPSIS
bos exec -server <machine name> -cmd <command to execute>
[-cell <cell name>] [-noauth] [-localauth] [-help]
bos e -s <machine name> -cm <command to execute>
[-ce <cell name>] [-n] [-l] [-h]
DESCRIPTION
The bos exec command executes the indicated command on the file server machine named by the -server argument. Its intended use is to reboot
the machine, using the /sbin/reboot command or equivalent.
OPTIONS
-server <machine name>
Indicates the server machine on which to execute the command. Identify the machine by IP address or its host name (either fully-
qualified or abbreviated unambiguously). For details, see bos(8).
-cmd <command to execute>
Specifies the complete local disk pathname of the command to execute (for example, /sbin/reboot). Surround this argument with double
quotes ("") if the command contains one or more spaces.
-cell <cell name>
Names the cell in which to run the command. Do not combine this argument with the -localauth flag. For more details, see bos(8).
-noauth
Assigns the unprivileged identity "anonymous" to the issuer. Do not combine this flag with the -localauth flag. For more details, see
bos(8).
-localauth
Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. The bos command interpreter presents the ticket
to the BOS Server during mutual authentication. Do not combine this flag with the -cell or -noauth options. For more details, see
bos(8).
-help
Prints the online help for this command. All other valid options are ignored.
EXAMPLES
The following command reboots the machine "fs2.abc.com". The issuer has previously issued the bos shutdown command to shutdown all
processes cleanly.
% bos exec -server fs2.abc.com -cmd /sbin/shutdown -r now
PRIVILEGE REQUIRED
The issuer must be listed in the /etc/openafs/server/UserList file on the machine named by the -server argument, or must be logged onto a
server machine as the local superuser "root" if the -localauth flag is included.
The bos exec command is not available on servers running in restricted mode.
SEE ALSO
bos(8)
COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas
Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
OpenAFS 2012-03-26 BOS_EXEC(8)