488890
241
Zoom out
Zoom in
Previous page
1/282
Next page
3. The script needs executable permissions. Set the permissions with the following
command:
chmod +x ~/bin/hello.sh
If you have fulllled all of the above prerequisites, you can execute the script in the
following ways:
1. As Absolute Path The script can be executed with an absolute path. In our
case, it is ~/bin/hello.sh.
2.
Everywhere If the PATH environment variable contains the directory where the
script is located, you can execute the script just with hello.sh.
18.3 Redirecting Command Events
Each command can use three channels, either for input or output:
Standard Output This is the default output channel. Whenever a command
prints something, it uses the standard output channel.
Standard Input If a command needs input from users or other commands, it
uses this channel.
Standard Error Commands use this channel for error reporting.
To redirect these channels, there are the following possibilities:
Command > File
Saves the output of the command into a le, an existing le will be deleted. For
example, the ls command writes its output into the le listing.txt:
ls > listing.txt
Command >> File
Appends the output of the command to a le. For example, the ls command ap-
pends its output to the le listing.txt:
ls >> listing.txt
Command < File
Reads the le as input for the given command. For example, the read command
reads in the content of the le into the variable:
read a < foo
Command1 | Command2
Redirects the output of the left command as input for the right command. For
example, the cat command outputs the content of the /proc/cpuinfo le. This
output is used by grep to lter only those lines which contain cpu:
Bash and Bash Scripts 229
241


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Suse openSUSE 12.1 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Suse openSUSE 12.1 in the language / languages: English as an attachment in your email.

The manual is 10,05 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Suse openSUSE 12.1

Suse openSUSE 12.1 User Manual - English - 450 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info