How do I comment parts of a multiline command? [duplicate]

I learned that on Linux the glibc’s malloc() uses mmap() for very big chunk of memories and brk() is used for small allocations.

Hi Guys,

I am relatively new to scripting at the moment and am struggling to get the following function to work. For some reason it does not recognise the arithmatic symbol when i select option1. Any help would be greatly appreciated.

Code:

menu () { echo "==============" echo "Calculator" echo "==============" echo "1. Divide" echo "2.

When I run a command like ls */*/*/*/*.jpg, I get the error

-bash: /bin/ls: Argument list too long

I know why this happens: it is because there is a kernel limit on the amount of space for arguments to a command.

I am trying to create a script to run vlc to play (or queue if a playlist is already present) some videos.

so far in my ~/bin/ folder I have created a file ``myvlc'' with the following command:

#!/usr/bin/env bash vlc --http-port 54444 %U

This works as a command if I set it as launcher command in an icon, but it doesnt work if from the command line I type: myvlc ~/Videos/Some\ Folder/video.avi

There is a program at work called processsubmit - it is kinda like a ping command plus a ps command - written in c.

we execute is manually and it pings all the processes in a region to make sure everything is running. instead of doing it manually, I cron jobbed it and make it pop out in an xterm;

I am writing a script and in the usage() function I want to specify the usage. My script uses either option1 or option2 or both.

Is there a standard way to write it up?

I have a "command" text file that issues a data file download command on each line. I send the command file to bash. However, a small percentage of the downloads fail.

I have tried other threads here but none seem to precisely address or fix this issue. I have a new instal of 12.04 with Unity. Cheese is installed When i run gstreamer-properties it seems to work ok When I run cheese i get a black screen and all options are grayed out.

hi,

I have used the cat command to combine several files, like this:

Code: cat file1 file2 file3 > file4 then, I used the sort command on file4.

let's say for example that file4 now looks like this:

Code:

  1  a 1 A     2 b  #  comment here 2 B

3  c # more comments here 3 c

(and so on ) question: How can I use the sed