Please explain me with examples for the above 2 statements.]
The shell sets $0 to the name used to invoke the script that is running. So, if you script is named test.sh and it is located in the directory /home/user/bin, $0 could expand to test.sh, ./test.sh, /home/user/bin/test.sh, or several other possibilities.
${variable##pattern} will expand to the value of $variable with the longest string matching the pattern pattern removed from the beginning of the string. If pattern doesn't match anything at the start of the string, the result is the same as the expansion of ${variable}. So if $0 expands to test.sh, ./test.sh, or /home/user/bin/test.sh; ${0##*/} will expand to test.sh.
Similarly, ${variable%pattern} expands to the expansion of $variable with the shortest match for pattern removed from the end. So, for the same values of $0 above, ${0%/*} will expand to test.sh, ., and /home/usr/bin, respectively.
Hi! I'm new in bash programming and I need to make an script that reads a txt file line by line (every line is like "Name;FirstLastName;SecondLastName;Sex") and has to give every student 3 random marks, its average and add a counter if they are male/female and if they passed. I've been trying with... (4 Replies)
Please take a look I am stuck on step 4
1. The problem statement, all variables and given/known data:
#!/bin/bash
### ULI101 - ASSIGNMENT #2 (PART A) - DUE DATE Wed, Aug 3, 2011, before 12 midnight.
###====================================================================================
###... (13 Replies)
Hello all;
I have little knowledge of bash programming, and I was wondering if you could help me out.
I would like to create a bash script, as detailed below.
process.sh is the bash script itself
list.dl is a text file. In this text file, the first line is the directory from... (1 Reply)
Hello
I have a unique problem of needing to delete large files slowly off of an XSan.
I was wondering if there is a script I could use to delete 100gb chunks of files and folders that get placed in to a watch folder, slowly so as not to disrupt the other users. I would like to use Automator in... (0 Replies)
Write a Shell script to analyse the disk usage of students in a particular class.
The program should allow the user running the script to input the particular class name (group name) as an argument to the script.
The script should create a file called “logfile” in the home directory of the user... (2 Replies)
Doubt #1
I have a program that I want the user to input date. When the user inputs the date, is it able to format it to system date dd-mm-yyy and then echo the value into a text file?
Doubt#2
If the above is not going to work, I tried to have the system date appear in the user input field and... (6 Replies)
I have a file that is 20 - 80+ MB in size that is a certain type of log file.
It logs one of our processes and this process is multi-threaded. Therefore the log file is kind of a mess. Here's an example:
The logfile looks like: "DATE TIME - THREAD ID - Details", and a new file is created... (4 Replies)
how to i grep a keyword which ignore upper case or lower case.
for an example :
user enter CoUcH
and the grep also can grep couch which in text.txt although upper or loever case is different .. how to do that ?
any idea? (1 Reply)
Hi all....
I was wondering if there is a lot of differences between /bash and ksh programming.
Im learning about bash programming, but all what I had read in this forum, points me to learn more about ksh over bash. Is that right and why?
Unfortunately, I can’t write ksh progs on my work,... (2 Replies)
