Would like to know how to turn "echo" off in a shell scripting. I wrote a shell script, testing a condition, after the condition tested. On the other line I used the echo Command to echo a line, then on the other line I used the "read" command to read an input typed. The crux here is the string or line inputed is what I would like to turn off. Distro is redhat linux.
View 6 RepliesI'm trying to create a shell script to take an argument and use it to name a terminal tab. So if the script's name is tabnm, tabnm "test" should rename the current tab "test"
This is my code:
#!/bin/sh
echo -ne "e]1;$1a"
but when i run it I get this output:
robin@icarus $ sh tabnm.sh test
-ne e]1;test
If I just run echo -ne "e]1;Testa" straight in the shell, the tab is renamed.
I want to suppress the output resulting from the commands in my scripts, when writing batch commands in dos I would just use @Echo Off.
I have written an example of what I want to achieve
Code:
#!/bin/bash
clear
@Echo off
[Code]....
check the following program
/*a.c*/
int main()
[code]....
I'm a n00b in shell scripting,echo "$num $den $file" is the current formatI need 10 right padding for each term above in the above where $num & $den is of %d type, whereas $file is %s type.
View 2 Replies View RelatedWhat is the difference between
$echo cat
$cat echo
how to echo an '-n' without a new line?
View 8 Replies View RelatedI execute an application from a script file and redirect stdin to it from here-doc like this:
my_cli << HERE_DOC
enable
configure
10
exit
exit
HERE_DOC
This works as expected, but I don't see neither the input nor the app output. The application is an interactive prompt written in C. When I interact manually with it, I see the prompt itself and responses to my input, but when I execute the aforementioned script I see nothing. I would like it to print the input and the output as if a real user was typing. Do you know how to achieve that?
I have a process which logs output to log.txt. If I want to see the process's status in real-time, is there a way to echo that output to stdout instead of opening the log in a text editor and constantly reloading?
View 3 Replies View RelatedWhat does echo $$ give as output?
View 3 Replies View RelatedI'd like a function in my .bashrc file that would allow me to pass text to it and echo the text to a specified file. I know it's simple as "echo 'text' >> file," but ideally, I would want to alias the function so I execute something like:
Code:
user~ $ write 'this is a test' with "write" being the function, and 'this is a test' being echoed to the file. I hope I explained that well enough.
I would like to append text to a file. so i wrote in bashecho text >> file.confHowever it doesnt leave a new line. So i can only do this once. How do i add a new line?
View 2 Replies View RelatedI want to prevent "^C" from echoing when Ctrl-C is pressed. I did "stty -echoctl" which some googling results suggested. Now it echos raw Ctrl-C characters instead of the string "^C". That's not any better since it displays some funny blocked hexadecimal in the terminal window.
View 8 Replies View RelatedIs it possible to echo the arrow keys (up, down, left, right) in bash?
View 4 Replies View RelatedBelow is the shell script that I am writing to beep an alert but listen to nothing.
Code:
#!/bin/bash
echo Listen to the alert!
echo -e "a"
echo listened ?
How to print "hello" infinite times without using implicit or explicit loop.
View 1 Replies View RelatedWe're going to be doing a rather large server deployment, and using the provisioning system we have in place there is no current way to just "copy" a file over to the servers. All files/scripts have to be run from the provisioning server.Due to network constraints, the provisioning system can't run a script we need to run (requires certain network assets to complete, but as soon as we modify the network settingshe provisioning system loses access to the server and can't run the script). So,our network configuration script to create the other script on the server in /root when it runs.My original method was to do something along the lines of:
Code:
#network configuration statements here
....
[code]...
Please explain why
Code:
echo some_directory | xargs cd
is not working.
Code:
echo some_directory | xargs ls
is working as expected.
whenever i hibernate or shut down my laptop,its touch pad automatically turns off..next time i login,i've to start it by pressing Fn+F8(which i think is my laptop custom shortcut).
View 5 Replies View Relatedthe screen is still on but it's like the computer is going idle or something, It makes watching tv shows/movies pretty hard. I have to constantly keep moving the mouse. I have a pentium 4 with about 600 megs of ram. Latest version of Xubuntu.I went into screensaver options and power management options. It's set to two hours before the screensaver comes on, and never to put the screen idle but the screen seems to do it every 20-30 minutes.I'm not entirely sure where to look now, i don't think there could be anything wrong with the hardware, otherwise moving the mouse wouldn't make the screen come back on.
View 2 Replies View RelatedI have bash script which has lots of echo statements and also I aliased echo to echo -e both in .bash_profile and .bashrc, so that new lines are printed properly for a statement like echo 'Hello World' the output should be I even tried using shopt -s expand_aliases in the script, I am running my script as bash /scripts/scriptnm.sh; if I run it as . /scripts/scriptnm.sh I am getting the desired output.
View 4 Replies View RelatedHow can i enable caps lock by using echo command. I know that by using syntax echo -e "33[3q" this only turns the capslock led to glow. but the capslock is not working i.e. the words are typed in small case only.
Then by using xmodmap command i.e. syntax xmodmap -e "remove lock = Caps_Lock" or xmodmap -e "add lock =Caps_Lock" doesn't work. On running this it shows unable to display.
can anyone tell me how can one enable capslock by using echo command. ofcourse we can glow the led by using the echo command.
Its syntax is echo -e "33[3q"
On searching i found that by using $xmodmap -e "add lock=Caps_Lock" we can enable capslock. but its not working.
Can any body tell me where can i found the source code for echo command. so that i can download it such that it can help me for further studies on echo command
View 8 Replies View RelatedI logged into my Red Hat Enterprise Linux machine at work (use it for software development) and the primary GUI does not load. Instead, widgets appeared for xclock, xterm, and Firefox. In the terminal, I start typing in commands to try to figure out what's going on, but all commands are not found except pwd and echo. I 'echo $PATH' and that returns just an empty, blank line. 'echo $SHELL' lets me know I'm using cash.
The likely cause was my attempt to install Adobe Reader Firefox plugin yesterday. After it downloaded, I ran the binary but Firefox didn't seem to recognize that I had installed it, so I went into my .cshrc file and added the adobe folder to the path. That didn't seem to work, so I gave up, deleted the binary and the folder I installed to, and removed that directory from the path in the .cshrc file. This last thing (the export PATH line in that file) I'm certain is back exactly as it was before.
I have successfully added the /bin and /usr/bin back to the path from command line via
setenv PATH /usr/bin:/bin
but of course it doesn't stick after reboot nor does it magically load the primary GUI. I'd rather not go through the effort of creating a ticket for our company's Global Service Desk cuz there's no telling how long that could take to resolve. In the meantime, I can't do any programming.
I faced a issue with updating a file contents with echo command which fails with error as below:
echo "foo" > bar //to create a file named "bar"
echo "foobar" > bar //to edit its contents
The latter fails, it prompts "File exists" i.e.
~>echo "foo" > bar
~>echo "foobar" > bar
bar: File exists.
~>cat bar
foo
~>
I have to run "pppd call idea" command from root shell every time to connect to internet from mobile. Now I want a script so that I just run it to connect. Something like :
#!/bin/sh
echo "password" --stdin | su -
pppd call idea
But its showing error that "standard in must be a tty". Why is this. Using CentOS 5.5
I am trying to figure out a totally odd behavior of the ext3 filesystem mounted in Ubuntu 9.10. There is a Korn Shell script, part of which does the following in the loop:
while ((1)); do
mv dir1/file dir2;
if [[ ! -r dir2/file ]]; then
echo "ERROR"
ls -l dir1/* dir2/*
exit 1
elif
echo "OK"
fi
done
Given that dir2/file always exists and that I do not move it asynchronously with "&", my script should never hit the "ERROR" statement. The odd thing is that it does, and quite randomly (no pattern at all). However when it does hit the ERROR case, ls -l prints that file is in dir2 and it is readable! I tried using "-e" instead of "-r" test - no luck. I never seen anything like this in 10 years of my programming experience. Same script worked fine on Fedora 11, and yet it wouldn't work on Ubuntu.
I have an embedded board with a small UPS. When AC power goes down, I need to turn off all power hungry devices in order to have a clean shutdown. First thing I do, is set DPMS to force powerdown, then go through the usual SIGTERM/SIGKILL/umount sequence. I have an Intel i915 Display adapter connected to an LVDS LCD panel.
Unfortunately, when Xorg dies, Xserver or the VT code turn the LCD panel back on.
I even tried working around it by directly poking the panel enable register in the Display chip, so that X doesn't know about it, but the panel goes back on when the VT comes back.
Is there any "legal" way of keeping the display off?
I have an Acer Aspire One with an SSD for storage. I recently installed Ubuntu on it and chose ext4 for my filesystem. Then I read that journaling on an SSD isn't the best idea, so I will try to disable journaling and I have found these intstructions [URL]..
# Create ext4 fs on /dev/sda10 disk mkfs.ext4 /dev/sda10 # Enable writeback mode. This mode will typically provide the best ext4 performance. tune2fs -o journal_data_writeback /dev/sda10
# Delete has_journal option
tune2fs -O ^has_journal /dev/sda10
# Required fsck
e2fsck -f /dev/sda10
[Code]...
I will use them on my boot partition. Are there any particularly bad parts here, or are there any missing steps? Will my boot partition be fit for being on an SSD after this? Or should I consider switching to ext2, or even reinstall it all and choose ext2 at partitioning time (I'd rather not though, since I've configured quite some stuff already)?