I have a Korn shell script that executes a number of commands on a remote server.
Is it possible to feed in the last exit code of the rsh commands (i.e. something like $?) to a variable within the local shell script?
I tried the following:
returncode=$(rsh spns31 ".... (1 Reply)
i have to run set of commands
command1
command2
command3
command4
Now Whenever any of these command fails i should quit while capturing error message.
Is there a better way then checking for $? after each command. (1 Reply)
Hi,
I am wondering how I can check the return value of all commands in a pipe such as
gzip -dc file.gz | sort -u > output.txt
If I run this sequence in bash and check $?, I get the return status from sort. But I want to know if the initial gzip failed.
Similarly for longer pipe chains,... (6 Replies)
Hello
I have a script which emails identifies the user ID of a user and sends them an email. A user can enter part of the name of the person he/wants to send the email to. Then I use the ypcat command to identify the UID of that person.
The problem I'm having, is building in an error trap... (1 Reply)
Hi
I want to output the results of multiple commands to a single file.
I use simple Ping, telnet commands to check the connectivity to many servers.
Can i execute all the commands and write the output to a file instead of executing them one by one?
Thanks
Ashok (2 Replies)
This is a three step process:
a) Upload date ->scrub\prep data,
b) insert into db,
c) return php results page.
I have a question about the best practices for unix to process this.
I have data from a flat file that I've scrubbed and cleaned with sed and awk. When it is complete I have an... (0 Replies)
Good day every one.
When a use df -h comand on my read hat linux server i get something like this:
/dev/mapper/Vg02-Lv19 30G 29G 145M 100% /app
Then when i do du -sh /app/
i get
12G /app/
For me it is meaning that only 12G was used on /app partition.
How can i see where are... (9 Replies)
cmd()
{
echo " "
echo "$(whoami)@$(hostname):$(pwd)# $*"
results=`eval $*`
echo $results
}
I want to get the eval $* 's return value and pass it to a new variable $val, and get "eval $*" 's the ... (7 Replies)
Hello and thanks in advance for any help anyone can offer me
I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
Discussion started by: bodisha
14 Replies
LEARN ABOUT DEBIAN
prune
prune(1) General Commands Manual prune(1)NAME
prune - Prune directed graphs
SYNOPSIS
prune [ -n node ] [ -N attrspec ] [ files ... ]
DESCRIPTION
prune reads directed graphs in the same format used by dot(1) and removes subgraphs rooted at nodes specified on the command line via
options. These nodes themselves will not be removed, but can be given attributes so that they can be easily located by a graph stream edi-
tor such as gvpr(1). prune correctly handles cycles, loops and multi-edges.
Both options can appear multiple times on the command line. All subgraphs rooted at the respective nodes given will then be processed. If a
node does not exist, prune will skip it and print a warning message to stderr. If multiple attributes are given, they will be applied to
all nodes that have been processed. prune writes the result to the stdout.
OPTIONS -n name
Specifies name of node to prune.
-N attrspec
Specifies attribute that will be set (or changed if it exists) for any pruned node. attrspec is a string of the form attr=value.
EXAMPLES
An input graph test.dot of the form
digraph DG {
A -> B;
A -> C;
B -> D;
B -> E;
}
, processed by the command
prune -n B test.dot
would produce the following output (the actual code might be formatted in a slightly different way).
digraph DG {
A -> B;
A -> C;
}
Another input graph test.dot of the form
digraph DG {
A -> B;
A -> C;
B -> D;
B -> E;
C -> E;
}
(note the additional edge from C to E ), processed by the command
prune -n B -N color=red test.dot
results in
digraph DG {
B [color=red];
A -> B;
A -> C;
C -> E;
}
Node E has not been removed since its second parent C is not being pruned.
EXIT STATUS
prune returns 0 on successful completion. It returns 1 if an error occurs.
SEE ALSO dot(1), gvpr(1)AUTHOR
Marcus Harnisch <marcus.harnisch@gmx.net>
prune(1)