I just wonder the distinction calling the function between $(one_function) and one_function in bash shell script.
When I set the variable PS1 in ~/.bashrc, I can't invoke the function by one_func
ex:
export PS1="
[e[31m] $(one_func) # it works
export PS1="
[e[31m] one_func # it doesn't work
I am running a Java application on the command line bash terminal under Mint Debian. I have JDK1.6.0_22 installed 64-bit, and the OS is 64-bit too. I have a few JAR files in the directory and a few native LWJGL libraries. When I run the application using the command line, all works fine.
Lets assume my directory where the files are is called /home/riz/MyGame. I change to that directory and this is the command I use code...
I would like know when it is necessary or advisable to write a shell script instead of shell function ?
View 3 Replies View RelatedWhen I try to invoke 'source' command from within a shell script, namely, myscript.sh, I get the following error message code...
View 1 Replies View RelatedMy main problem right now is doing floating point arithmetic within a bash script, with variables.Right now I have a folder called "myExamples" with a script called "run_example" that runs with no issues.I plan to(1) create many folders inside [myExamples], that are named [example10] [example11]...each containing an identical copy of (run_example),(2) modify Line 172 of each copy of (run_example)...in one copy, it would be 3.00, the next copy would have 3.05, etc. (This part doesn't work!)How can I use the available calculator bc code to do floating point operationsMy code is below -
#!/bin/sh
# run from directory where this script is
cd `echo $0 | sed 's/(.*)/.*/1/'` # extract pathname
[code]....
If you set or export an environment variable in bash, you can unset it. If you set an alias in bash, you can unalias it. But there doesn't seem to be an unfunction.
Consider this (trivial) bash function, for example, set in a .bash_aliases file and read at shell initialization.
function foo () { echo "bar" ; }
How can I clear this function definition from my current shell? (Changing the initialization files or restarting the shell doesn't count.)
I have trouble with using an alias inside aash function. I would like to ssh into multiple machines by executing:ssh machine To achieve this, I put something like the following into my ~/.bashrc:
alias machine='user@machine'
ssh()
{
[code]....
I have packer installed for AUR packages, but I want to be able to use the pacman command for both. I think I will need a function for this -- what I mean is that whenever I use pacman, it will try using packer and if that fails (invalid option) it will use pacman-color. It could also decide which program to use based on the arguments. I can't just use packer (alias pacman='sudo packer') because packer doesn't have some options like -R to remove packages. I want to always use it to install and upgrade packages however, because It can install from the default repositories as well as AUR.
Does someone know how to accomplish this, or could point me in the right direction? I'm new to bash scripting. error (e.g. pacman -V prints packer: Option '-V' is not valid.).
i am dealing with this problemI have a function
function Une {
...
return $some_variable
[code]...
I just started writing bash scripts and have a little question about the text editors. I now use gedit which I really like (don't like emacs for some reason), but I do miss some function for inserting/removing comment signs (in this case # for bash scripts) on a whole block of text. For example in Matlab you can simply mark a whole block and comment/uncomment all of it at once. Is this possible in gedit (via some plug-in or something?), or maybe in some other nice editor you can recommend?
View 7 Replies View RelatedI looked on the net for such function or example and didin't find anything, thus after having made one i guess it would be legitimate to drop it to see what others thinks of it.
#!/bin/bash
addelementtoarray()
{
local arrayname=$1
[code]....
My main problem right now is doing floating point arithmetic within a bash script, with variables.Right now I have a folder called "myExamples" with a script called "run_example" that runs with no issues.I plan to(1) create many folders inside [myExamples], that are named [example10] [example11]...each containing an identical copy of (run_example),(2) modify Line 172 of each copy of (run_example)...in one copy, it would be 3.00, the next copy would have 3.05, etc. (This part doesn't work!)How can use the available calculator bc code to do floating point operations?My code is below -
#!/bin/sh
# run from directory where this script is
cd `echo $0 | sed 's/(.*)/.*/1/'` # extract pathname
[code]...
I want to change my default shell to tcsh. I used
Code:
usermod -s /bin/tcsh username
command as given at url
But if I open a new shell, it is still a bash shell.
How do I make my default shell as tcsh?
I used c-shell previously in unix. One of the useful command I used frequently is foreach.> foreach a (`cat list`)>> echo $a need to use bash shell now instead, and realized that I can't use foreach anymore. The command is not found. Does anyone knows if there is similar command / function in bash shell?
View 9 Replies View RelatedSo I open firefox from my bash shell with:
Code:
firefox google.ca
it opens firefox, I can browse, etc.
Now if I alt-tab back into my shell, i can't enter any commands in the shell.
I know that i can do this if I close firefox, but I want to keep working in my shell with firefox still open.
Is this possible?
Is there a way to define an unlimited history in Bash ?
View 3 Replies View RelatedPossible Duplicate: Can history files be unified in bash? I have bash running in an ssh session, call this session A. I leave the office, go home, ssh to the same box, call this session B. From session B, I'd like to be able to look at the history of session A.
View 1 Replies View RelatedHow can I get/filter history entries in a specific range?I have a large history file and frequently usehistory | grep somecommandNow, my memory is pretty bad and I also want to see what else I did around the time I entered the command.For now I do this:get match, say 4992 somecommand, then I do history | grep 49[0-9][0-9]this is usually good enough, but I would much rather do it more precisely, that is see commands from 4972 to 5012, that is 20 commands before and 20 after. I am wondering if there is an easier way? I suspect, a custom script is in order, but perhaps someone else has done something similar before.
View 2 Replies View RelatedCurrently the terminal prompt looks like this:[karlis@karlis-desktop current_folder]$How can I minimize the prompt, so that it only shows $ or # without extra info in square brackets?I checked the preferences for the default Gnome-Terminal and Terminator - there are no settings for this. It is pretty hard to use terminal when working in directories with long names.
View 1 Replies View RelatedI've written a bash shell script (code provided below) that gives the user 4 options. However I'm having a little trouble with the code. Right now when they select option 3, to show the date.It loops over and over again.I have to close the terminal window to stop it because it's an infinite loop. How would I prevent this? Also quit doesn't seem to be working either.
#!/bin/bashe
echo -n "Name please? "
read name
echo "Menu for $name[code]............
In linux how do I to get the ascii decimal/hex/oct code from a char or a ascii char from a decimal/hex/oct code. I see from the gnu sed user manual that I can use the d# o# x# to specify a character but I am not sure how to use that. If some one has a better way to get the the ` and ' chars through I want to sed with the backtick '`' character and ''' single quote character.
sed '/`/p'
these don't work
sed '/'/p'
sed '/`/p'
I am working on a simple script that should take two command line arguments, a [number] and a [name]. The first thing the script should do is check to make sure that no more and no less than two command line arguments have been entered when calling the script - an error message should be delivered if the condition is not true.
If two args have been entered, then the message 'processing "scriptname"' should appear, where scriptname is the name of the script being called. The script should then write to the screen "Hi [name]!", and should write this phrase [number] of times. For example, the command $ myscript 2 joe would produce the output: I have read the manual many times looking for examples, and I am very close by virtue of my own efforts. Further, I have searched these forums and others for good examples, which have also gotten me very close. Still my script is not completing the objective, and I am wondering if someone could point me in the right direction. Script:
[Code]...
i have a script where i need to pass an argument "1234:-)"if i run this as ./shell.sh 1234:-)it wont work because invalid character. i need to handle this with expect utility so if i pass it as ./shell.sh "1234:-)"no issue in bash but expect does not recognize this.
View 7 Replies View Relatedhow do i use bash shell scripts inside php.I am just trying to call a simple cp command using php. Its not doing anything.
View 2 Replies View RelatedIs there some type of functional way to read things in the Python shell interpreter similar to less or more in the bash (and other) command line shells?
Example:
Code:
>>> import subprocess
>>> help(subprocess)
...
[pages of stuff to read]
...
I'm hoping so as I hate scrolling and love how less works with simple keystrokes for page-up/page-down/searching etc.
I Have shell script like this
Code:
#!/usr/bin/expect
set password "XXXXXXXX"
[code]...
I am wondering is it possible to echo values like below described? The situation is - there are too many "doc" files named like "PLCI507_01234567.doc", and there is a Form in a text file named "form.txt" looks like below:
I am already able to create files in the same format for each documents but now I want all the information in a single form and the form should be updated with file informations ie. file name, created date, md5sum etc.
The updated form.txt should be like below.
I have a CentOS dedicated server running ProFTP. I have created user accounts which are meant for FTP access only but the users cannot connect to the FTP unless their shell access is /bin/bash
Here is an example line that is outputted when I use this command:
This user can access the FTP fine, but he can also access SSH which I don't want to allow him to do. If I set his shell access to /bin/false then he can't connect to the FTP.
What can I use in instead of /bin/bash to allow FTP but don't allow SSH?
I have a user that has been used for long time now that runs o C Shell... now there is a need to change it to Bash Shell? Can I cause a problem changing his shell from C to bash? I mean apps or variables?
View 2 Replies View RelatedI am unable to use clear or cls command on bash shell. I have recently installed Cygwin and am using that for practicing unix commands.
I see that I can use Ctrl + L to clear the screen. I created an alias in my .bashrc to do the same as
alias cls='^L'
This is how i defined other aliases e.g.
And they work. Hence I assume cls will work too but this is what I get when I try to give cls on command prompt. Am i missing something? Is there a way to do this?
Then someone suggested, You cannot alias keystrokes to commands or vice versa. You could just alias cls to an echo command: echo -en "x0c"
And I added the following to .bashrc,
Sourced the .bashrc file. No errors but cls still does not clear the screen. Infact when I typed the echo -en "x0c on command prompt as well, nothing happened. What does this command do?