Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Trying to understand a complex bit of code Post 302754465 by Corona688 on Thursday 10th of January 2013 03:37:38 PM
Old 01-10-2013
If you've ever used 'if' in a shell script, you know what [ ] or [[ ]] statments do.

[ ] and [[ ]] are not even part of if -- they work just fine without it.

&&, || are short-form if then.

Code:
true && echo "This will print"
false && echo "This will not"

true || echo "This will not print"
false || echo "But this will"

 

8 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Code Understand ?

Hey, Could you explain me what this code is doing ? For example: $i has value 9 $1 is the name of the file say FILEBkUp while do if $1.`/bin/expr $i - 1` ] then mv -f $1.`/bin/expr $i - 1` $1.$i fi i=`/bin/expr $i - 1` done Thanks... (2 Replies)
Discussion started by: varungupta
2 Replies

2. Solaris

Porting C++ 32-bit code on 64-bit Solaris

Hi, I am trying to convert 32-bit code to 64-bit. I have defined function int main() { int* l; size_t len1; fun(len1); return 0; } void fun(int* ptr) { cout<<"\nsizeof(ptr)"<<sizeof(ptr); } However while compiling getting error as : Error: Formal argument ptr... (2 Replies)
Discussion started by: amit_27
2 Replies

3. UNIX for Dummies Questions & Answers

unable to understand a awk code

i am not able to understand the following code for awk: $awk -F"|" '{ kount++} >END { for (desig in kount) > print desig,kount }' emp.list the input file i.e. emp.list is :: 3432| p.k.agrwal |g.m |sales 4566|g.l.sharma |director|production 3433|r shah | g.m | production... (1 Reply)
Discussion started by: streetfi8er
1 Replies

4. Shell Programming and Scripting

search 3 file and write to 4th file (a bit complex)

hi buddies; rollbackip.txt:10.14.3.65 2 10.14.3.65 3 ... lookup.txt: ... 10.14.3.65 2 10.14.5.55 1 55 10.14.6.66 1 66 10.14.3.65 3 10.14.7.77 3 77 10.14.8.88 2 88 10.14.9.99 4 99 ... ip-port.txt ... port111 3 10.14.5.55 57 port111 2 10.14.5.55 51 port111 1 10.14.5.55 59 ->... (7 Replies)
Discussion started by: gc_sw
7 Replies

5. Shell Programming and Scripting

Need help to understand Awk code.

Hi Guys, Can someone please explain this code to me. I could figure out it's adding and comparing two fields but I am not sure which ones. sort -t"|" -k3.1 /tmp/mpcashqc.xtr| awk -F"|" '{CHECKAMT+=$3;BATCHTOT=$4;\ items++}END{for(i in CHECKAMT) if (CHECKAMT!=BATCHTOT)... (6 Replies)
Discussion started by: nua7
6 Replies

6. Programming

Need help with this c++ source code! DOnt understand what some stuff mean.

Okay so I am just starting programming c++. I just started started to red "C++ for Dummies yesterday and theres a lot of things I do not understand from this book and this source code especially. I will first post the full source code and then post questions about certain thing, usually what they... (2 Replies)
Discussion started by: orszhak
2 Replies

7. Shell Programming and Scripting

help can't understand the code

Hi All, Good day, i'm just wondering what is the meaning of this code? COUNT_EXTRACTED_FILE=`${ECHO_CMD} "${SE_IN_PATH}${SE_IN_FILE}" | ${AWK_CMD} -F"__" '{print $2}'` Thanks, -niks(newbie) (2 Replies)
Discussion started by: nikki1200
2 Replies

8. UNIX for Dummies Questions & Answers

help me to understand this code

Hi guys can you please help me to understand this code . tmpArray=(${line//=/ }) Please next time open a new thread in the appropriate forum and use code tags (6 Replies)
Discussion started by: sandhya.gilla
6 Replies
asadmin-start-domain(1AS)					   User Commands					 asadmin-start-domain(1AS)

NAME
asadmin-start-domain, start-domain - starts the given domain SYNOPSIS
start-domain [--domaindir install_dir/domains] [--terse=false] [--echo=false] [--verbose=false] [--debug] [domain_name] start-domain starts the specified domain. If there is only one domain in the default domain directory (install_dir/domains), then no oper- and is required to start the domain. However, if there is more than one domain, the domain operand must be specified. This command can only be run locally. OPTIONS
--domaindir directory where the domain is to be started. If specified, path must be accessible in the filesystem. If not speci- fied, the domain is started in the default install_dir/domains directory. --terse indicates that any output data must be very concise, typically avoiding human-friendly sentences and favoring well- formatted data for consumption by a script. Default is false. --echo setting to true will echo the command line statement on the standard output. Default is false. --verbose by default this flag is set to false. If set to true, detailed server startup output is displayed. Press CTRL-C to kill the server. Press CTRL- to print a thread dump. --debug by default this flag is set to false. If set to true, the server is started in debug mode and prints the JPDA port on the console. OPERANDS
domain_name name of the domain. Must be a unique name. Example 1: Using start-domain asadmin> start-domain sampleDomain Starting Domain sampleDomain, please wait. Domain sampleDomain started Where: the sampleDomain domain is started. EXIT STATUS
0 command executed successfully 1 error in executing the command asadmin-create-domain(1AS), asadmin-delete-domain(1AS), asadmin-stop-domain(1AS), asadmin-list-domains(1AS) J2EE 1.4 SDK March 2004 asadmin-start-domain(1AS)
All times are GMT -4. The time now is 03:31 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy