1. Shell Programming and Scripting

how efficient is it, and how practical is it to call outside programs in a shell script (bash) for small tasks? for example, say i have a script that might preform many tasks, one of those tasks may require root access; rather than implementing inside the script a method to use su or sudo to... (11 Replies)

2. Shell Programming and Scripting

I have the following Perl snippet: # get datetime @dt = gmtime(); $strdate = 1900 + $dt . addleadingzero(++$dt) . addleadingzero($dt) . addleadingzero($dt) . addleadingzero($dt) . addleadingzero($dt); # write to file $outfile = $strdate . ".txt"; getstore($url, $outfile) or die "Error:... (3 Replies)

3. Shell Programming and Scripting

Hi !! I've finished an awk exercise. Here it is: #!/bin/bash function calcula { # Imprimimos el mayor tamaño de fichero ls -l $1 | awk ' BEGIN { max = $5; # Inicializamos la variable que nos guardará el máximo con el tamaño del primer archivo } { if ($5 > max){ #... (8 Replies)

4. Shell Programming and Scripting

I've got this program set up so that it creates files whose unique names specify the jobs their contents describe. In order to retrieve the information inside those files, I have to do a "grep" and awk or sed to extract it. I've just assumed that making a directory with that unique name that... (1 Reply)

5. UNIX for Advanced & Expert Users

Hello, there. I'm a new beginner to Linux kernel and curious about its memory management. When multiple applications apply for memory space at the same time, how Linux kernel solve the resource contending problem for high performance? I have known that there is a buddy system for allocating and... (4 Replies)