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 know that using alias I can run a whole command with a shortcut. But my requirement is to use parts of a long command and in between I have to pass some user defined values.
E.g. Suppose I have to routinely copy a directory to another remote directory on a remote machine.The remote machine name is quite long as well as the directory path to which I want to copy the files into.So the command to do scp would look like this[URL]Now I want to do some sort of aliasing (say "ecp") so that I just need to pass the source_directory name and the ecp command and do my job
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.).
This should be a simple thing to accomplish, but I can seem to figure it out. Essentially, I want to have a bash alias or function that will let me recursively grep the current directory. A while back I added this to my .bashrc:
Code:
alias rg="grep -r --exclude=*/.svn/* --exclude=*.swp"
This works fine, (and also ignores any svn and vim swp files), and I can call it like:
Code:
rg foo *
However, 99.999% of the time, I am only interested in searching in the current directory, so the "*" is a bit redundant. Also, I would say 5-10% of the time, I am typing faster than thinking and forget the "*", so grep just sits there trying to read from stdin. It's a pretty minor thing, but ideally I'd like to be able to just type:
Code:
rg foo
I've tried creating a function to handle this:
Code:
function rg(){
grep -r --exclude=*/.svn/* --exclude=*.swp $1 *
}
but it behaves exactly the same as the alias above. escaping the "*" with 's doesn't work, and neither does trying `pwd` (or even a hard-coded path) in its place.
I need to shift the positional parameters of a script inside a function, but any call to "shift 1" inside a function shifts only the parameters of that function. Is there some way of accomplishing that? I tried another approach using an alias. The problem is that I have to take the result of the alias. So I call in my script:
Code:
var=$(shiftalias)
At first time, it works correctly, but after that it does not shift the parameters anymore.
I tried this to set an alias: alias lsf='ls -f' and it works fine... But when I put it in a bash script it doesnt work. SCRIPT:
cd ~
alias lsf='ls -F'
lsf
I get the following output: line 3: lsf: command not found
The code:
Quote:
Problem: I need a method to maintain the $i variable. In fact, actually, this variable get lost when executed. I think that an escape can preserve this variable and permit its execution inside the function, but I've no idea about.
The first call to "somefunction" works as expected. The function prints "endfunction" and a process in background sleeps 30 seconds. In the second call I thought it should work in the same way, but the script sleeps 30 seconds before it prints "endfunction".Does someone know the reason of this behavior? Is there another way to do a command substitution of a function that has a background process without have to waiting for that process?
View 2 Replies View RelatedI want to create an alias or function that when used prints something like this on the command line so I can further modify it before pressing enter myself.
Code:
$ FILE=exercise1; cc -o $FILE $FILE.c && ./$FILE; FILE=
The idea is that I'm studying c and want to change the name of the file once instead of
[code]....
how 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 RelatedI am very new to shell script, and my requirement is --
1. open the apache access log, use "cut" and "grep" to find the numbers.
2.put the result in a file
3.then compare the same result with day before result
4. send the result via e-mail.
so how can i do that , using some functions..
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 a fresh desktop install ubuntu 10.04 which then I added the fvwm-crystal package (and dependencies). I logout of gnome, and into fvwm. When I do so, I lose my wireless connection that was started when I was in gnome. Is there a way to get a wireless manager to function inside fvwm (if I add it to the auto-start in my fvwm2rc?). What app can I use? I tried and failed miserably using the command line iwconifg/iwlist tools.
View 2 Replies View RelatedI 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 dealing with this problemI have a function
function Une {
...
return $some_variable
[code]...
I just started writing bash scripts and have a little question about the text editors. I now use gedit which I really like (don't like emacs for some reason), but I do miss some function for inserting/removing comment signs (in this case # for bash scripts) on a whole block of text. For example in Matlab you can simply mark a whole block and comment/uncomment all of it at once. Is this possible in gedit (via some plug-in or something?), or maybe in some other nice editor you can recommend?
View 7 Replies View RelatedI am trying to execute executable files in bash without adding ./ I know there must be an alias to add in .bashrc, that must be something like alias PATH=$PATH:. But this seems not to be working.
View 1 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]....
Does declaring variable inside a function give an extra overhead on an application? Would it be better to declare the variable globally and just reuse it? Example
Code:
#include <blah>
char mybuffer[2048];
int main()
[code]....
The only difference is the declaration of my variable. Since myfunction() will be called many times will it add an additional overhead if it will create mybuffer[2048] over and over?
I've noticed something, and hoped there was a work around.when I write a simple bash script, and run it, if I close the terminal i ran the bash script inside, the bash script stops. What are the solutions for this? Basically I want to run my bash script and close the terminal, keep the bash script running.
View 6 Replies View Relatedim pretty sure this is a remedial task for many of you but im having an issue with arrays from a shell script being accessed in an awk command. im pretty good with shell scripting but i am embarrassingly unfamiliar with awk. so here's the meat of the script...
Code:
I am trying to take an input file of ip addresses and corresponding netmasks and put it into a format to be loaded onto a juniper switch. the result should look something like this.. x.x.x.x/netmask using the cidr notation. no matter what subnet is provided though, /32 always gets appended to the end of the ip even when it should be /16, /24, etc... also, the cisco part works fine so that doesnt need any attention.
I want to do the following redirectin inside a bash script :
1. all the stdout will be redirected to a /tmp/log
2. all the errors will go to the stderr and also to the /tmp/log.
The following inside a bash script is not working, WHY and HOW to do it:
Rest of the bash script.
I'm trying create script to manage one mysql database, including new db and user creation. But I'm not able get it working when I put SQL commands into function. So I create simple script for testing which is still not working
Code:
#!/bin/bash -x
MAIN_DIR="/admin/mysql"
MYSQL_CNF="$MAIN_DIR/auth.cnf"
MYSQL_CMD="mysql --defaults-file=$MYSQL_CNF"
[code]....
What I'm trying to do is grep [mysqld] from inside my.cnf and then add lines inside the file should they not be there. how do i do that?
View 3 Replies View RelatedI am trying to build a function inside a script.
Code:
#!/bin/sh
#System commands and other configurable.
IPT=/sbin/iptables
IP6T=/sbin/ip6tables
IPST=/usr/sbin/ipset
MODP=/sbin/modprobe
GET=/usr/bin/wget
INT_NET=192.168.1.0/24 .....
I can find lots of tutorials in how to use if, then, else. However, how do I define a variable inside the function?
SEE>>
Code:
for c in $ISO
Also, am I using the 'test' command correctly( -/+ week as valid test)?
I'm having problems with bash quoting. Maybe someone can tell me what's going on.. Basically, I need to create a command line inside a bash script that contains arguments that contain spaces and bash variables that need to be expanded.
[Code]...
Writing script to create backup of file by adding datetime to file name. Basically test for file presence if there, cp with datetime then rm original cp works fine from command line but get cannot stat `full path to file': No such file or directory
Code:
Here are the errors: cp: cannot stat `~/html/CVP_dadamail/.dada_files/.logs/errors.txt': No such file or directory rm: cannot remove `...': No such file or directory
The for statement is a placeholder as I have same file to backup out of several directories. using "bash -x scriptname" -OR- inserting echos, I can see I've constructed the strings properly. Believing it might be related to the hidden directories, I tried setting the shopt "glob" options to no avail.
Ultimately I'll add the other directories to the for loop and then run this from a cron job, so if you see potential pitfalls knowing I'm headed in that direction...believe construct would be
Code:
I'm trying to create an SSL certificate and answer the questions inside a bash script. The command used to create the SSL certificate
Code: openssl req $@ -new -x509 -days 365 -nodes -out /etc/apache2/apache.pem -keyout /etc/apache2/apache.pem
The first question asked is. Country Name (2 letter code) [AU]:
I wanted to make an alias with arguments (like in cshell) which is in bash done by functions. The function must simply perform a command (nedit), append the arguments from the cli and make it run in the background (adding &).
So here is the function in a naive attempt:
Code:
when using the command
Code:
Code:
How can i use arguments and still start it in background? In cshell it was like:
I made a script that calls a function. However when I run the script I cannot get a value from the first parameter. Here is the function:
Code:
$cat function_library
_file_info()
{
if [ -e "$1" ]
then
[Code]....
