11-29-2012
1) In case of a pipeline, the exit status is that of the last command (unless the shell supports the pipefail option and that is set). So, the exit status is that of grep -v grep, which will be 0 if it anything passes through this grep command to standard output.
In short, if the process is running, this will return a 0 (success).
2) No. That means if not 1 which might not be the same as if 0.
3) Yes.
9 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I'm trying to compile and install both most recent version of 'make' and the
most recent version of 'openssh' on my Sparc20.
I've run into the following problems... and I don't know what they mean. Can
someone please help me resolve these issues?
I'm using the 'make' version that was... (5 Replies)
Discussion started by: xyyz
5 Replies
2. UNIX for Dummies Questions & Answers
Hi
how can i do this?
1) shell script which writes data and time on to a file if filesystem exceeds 70% of space.
2) make entry to cron table to run a script every 15 mins.
and can anyone expplain or demonstrate the difference between variables used in inside a function and outside a... (3 Replies)
Discussion started by: vivekshankar
3 Replies
3. UNIX for Advanced & Expert Users
Hi,
I,ve a Unixware 7.1.3 working correctly for two years ago, since a several weeks I've a problem with the command last . The information that this command return is :
For example :
1.- The user root , time login : 12:15 h, time logoff 12:15 h (the real time is 14:00). Connected time is... (3 Replies)
Discussion started by: By_Jam
3 Replies
4. UNIX for Dummies Questions & Answers
I'm having problems uses "if"
it works fine when i do this.
#!/bin/sh
a= 10
qw= 2
w= 20
{
if && ;then
echo 3
fi
}
However if i try to do
#!/bin/sh
a= 10 (5 Replies)
Discussion started by: THM
5 Replies
5. UNIX for Dummies Questions & Answers
Hello,
I am having problems with using less on
Linux version 2.6.18-92.1.17.el5 (brewbuilder@hs20-bc1-7.build.redhat.com) (gcc version 4.1.2 20071124 (Red Hat 4.1.2-42)). I am using csh but have the same problems on bash.
If I pipe something to less it works perfectly i.e. cat file | less... (9 Replies)
Discussion started by: z1dane
9 Replies
6. Shell Programming and Scripting
Hello, I have the following piece of code that tries to retrieve the result of a .sh:
. $HOME/prueba/Scripts/Recogida/recogida_sedra.sh
resultado=$?
echo "el resultado es : $resultado"
if ; then
echo "Se va a preprocesar los archivos"
In the code of recogida.sh I have the... (8 Replies)
Discussion started by: danietepa
8 Replies
7. SuSE
good friends I am new to linux and I have the following
TELNET service problem entering data devo
telnet to a Windows server 2003 server and passes
will not let me since the move to this server by
telnet tells me the characters and thus invalidates me
income, I have a service application... (1 Reply)
Discussion started by: pepetico
1 Replies
8. UNIX for Dummies Questions & Answers
I have written the following code in cygwin to create directories in windows based on the parameter passed.
echo $1 > fullpath
path1=`awk -F / '{print $1}' $fullpath
path2=`awk -F / '{print $2}' $fullpath
if
then
if
then
if
then
continue
... (4 Replies)
Discussion started by: janardhanamk
4 Replies
9. Shell Programming and Scripting
#! /bin/bash
# ask what the user would like to do
CMD=$CMD
MBA=$MB
RS=$RS
CT=$CT
echo
echo -n "What would you like to do??
REMEMBER WHEN PROGRAMMING ICP's TO SELECT CORRECT COMMAND ACCORDING TO
NECCESSARY TYPE CODE!
Please enter a command
ct = program ctek
... (5 Replies)
Discussion started by: tdalyman
5 Replies
ZGREP(1) General Commands Manual ZGREP(1)
NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep is used to invoke the grep on compress'ed or gzip'ed files. All options specified are passed directly to grep. If no file is speci-
fied, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and
fed to grep.
If zgrep is invoked as zegrep or zfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, zgrep uses
it as the grep program to be invoked. For example:
for sh: GREP=fgrep zgrep string files
for csh: (setenv GREP fgrep; zgrep string files)
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO
grep(1), egrep(1), fgrep(1), zdiff(1), zmore(1), znew(1), zforce(1), gzip(1), gzexe(1)
ZGREP(1)