Fedora :: Some Bash Script Commands Won't Run
Aug 6, 2009
I'm setting up a scheduler to run some bash script commands but they won't run when I point them to a script file. If I change the cron to call
[code]...
If I run ./writeTimeToLog from the terminal - it, well, writes the time to the log file! I then use
[code]...
to test I can schedule this to run every minute just so I can see it working. the entry was a basic as I could make. It adds the cron successfully but never seems to update the file. Where would an error be put if one occurred.
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Mar 3, 2010
I need to launch a bash file in Linux from an unprivileged user session, file that will run bash commands as root. But I do not want to create an user with root privileges to do that.
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Jul 17, 2010
below are the details of my system. I have bash as my current shell, some really common commands aren't working.
Do I need to do a re-installation of bash? Or how do I install a selection of bash commands which I need? (for example a subset of [URL])
Code:
root@sdptfw:~ # uname -a
Linux sdptfw.sdpt.co.za 2.4.36 #1 Tue Jul 22 13:13:24 GMT 2008 i686 i686 i386 GNU/Linux
root@sdptfw:~ # echo $SHELL$
/bin/bash$
[Code]....
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Oct 10, 2009
I need to do some text file manipulation which I think should be done with standard commands in BASH. I'm looking at comma seperated text files (stock market data). It comes in the form of date, stock code, open, high, low, close, volume. What I need to do first is move all data with same stock code sequentially into individual files.
While doing this since the stock code will now be the file name I need to remove the stock code. Next I need to filter out overlapping data from different files with the same date. ie. where two files contain the same date on the one line only one line will be added to the combined file. I think there must be a tutorial out there for basic text manipulation like this, I just haven't found it yet.
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Dec 3, 2010
What happens when the script executes is that the ssh connection works and parks me at the remote hosts's shell login. Therefore, the "firefox" command refuses to execute. I need to know how to make the "ssh" connection occur, stay open, and go into the background so that the rest of the script can execute.If I could also do this with the "firefox" line so that the entire term window could be closed would also be helpful.
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Apr 7, 2010
I would like to be able to connect to a machine, list a directory, wait long enough for me to see the results then move on to the next machine.This is failing:
Code:
#!/bin/bash
while read line; do
[code]...
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Aug 1, 2010
I would be running SQL commands (UPDATE/SELECT) from within my bash script. I am completely new to this subject. Is MYSQL used for this purpose? Alternatively, what is sqlplus?
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Apr 25, 2010
want to set more text files. They have "tab" differently (3, 4, 6 or 5 characters space).I have to use "sed" or "awk" sette them in the same tab (for example five space haracters).
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Feb 21, 2011
Where are the other BASH commands/exe stored? If the commands are part of the exe of BASH than ls would not be in a path, correct?
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Dec 21, 2009
Our CentOS 5 server had a weird issue last Friday. We couldn't run any bash commands, such as ls, vi. It said that it could not find /bin/ls. The only commands we can run are internal commands, such as ps, cd. After we reboot the server, everything is back.
I don't know what's wrong with it. Does anyone give me a explanation?
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Sep 10, 2010
This is a really odd bug I can't seem to figure it out. Basically, commands like ls can see all the files in the current directory, however when I go to execute the file it will give errors like "file not found", even when it most obviously is. If you look at my command history in the screenshot, you can see I can ls into a directory and see it's contents. When I try to run the file, I get the "no such file or directory" error.
However, if I type simply 'vm', I can't use tab completion to complete the directory name, and my third command is me typing 'vm' and hitting tabtab, it lists a bunch of vmware specific tools instead of the subdirectory name. I can then ls and see my current directory contents, and it will list only the single subdirectory. However, then I tried to use the full filepath from root to run the file, still to no avail. If anyone has any insight,
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Jul 31, 2011
is there any way I can pass commands to the CLI of a tool directly?
I would like to script some actions, for example:
./OpenBTS < "tmsis"
I do not need to retrieve the results (I watch it in the log file). how I could realize that? There is now way to do this using command line parameters, at least not that I found out. So it looks like I have to figure out sth myself. Maybe I could automate screen in a way to detect the prompt and "paste" my command there. Are there tools for this on Linux?
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Sep 14, 2011
Is there any way to list just the folders in a directory using bash commands? ( as the ls command lists all the files and folders )
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May 15, 2010
What is the difference between For and While when creating loops in bash scripting?
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May 4, 2011
im 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.
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Apr 28, 2010
I made a script that contains repetitious commands (snmpget and awk are the only ones at the moment. Running these commands from standard terminal work, but when run within a script, I get:
./reg_sm_count: line 10: snmpget: command not found
./reg_sm_count: line 10: awk: command not found
./reg_sm_count: line 10: snmpget: command not found
[code]...
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Dec 2, 2010
I'm creating a bash script that contains the following line:"ssh user@$server1 cd /tmp; pwd"What I want is to print /tmp of server1, but the script it isn't printing that
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May 5, 2011
I'm trying create script to manage one mysql database, including new db and user creation. But I'm not able get it working when I put SQL commands into function. So I create simple script for testing which is still not working
Code:
#!/bin/bash -x
MAIN_DIR="/admin/mysql"
MYSQL_CNF="$MAIN_DIR/auth.cnf"
MYSQL_CMD="mysql --defaults-file=$MYSQL_CNF"
[code]....
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Jan 11, 2011
I'd like to add custom startup commands (for example starting a process, registering to a registration server, downloading a configuration file) to the Linux startup process. Those commands should be triggered on startup only. What is the standard/appropriate way to do this?
EDIT: Is /etc/profile the right place to trigger such things?
EDIT2: I'm using Ubuntu.
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Feb 19, 2010
I created variables in python and would like to be able to incorporate those into bash commands that will be mixed into the script. Example:
Code:
name=raw_input("Type your name and press ENTER: ")
import os
os.system( echo "name")
Of course this doesn't actually work, but i think you get an indication of what I am trying to do.
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Apr 16, 2010
Is there anyway to test a bash script without actually running the commands to see if the syntax is proper? Google is of no help.
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Sep 21, 2010
I'm trying to write a bash script that will simultaneously ping a host and execute a traceroute at the same time. I would like the results to output to a text file.
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Sep 24, 2010
I was reviewing some scripts written by a person that does not work with us anymore and I found a chunk of code I'd like to know more about.
Code:
mycli <<! >> /var/myprogram.log
command_1
[code]...
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May 18, 2011
What bash command can I use to rename or change the extension or name of a batch of files (for example, from .php to .html)?
Furthermore, is there a simple bash or python script/command that can be used to open a batch of plain text files one-by-one, search for all instances of a specific word, and replace all of those instances with another word?
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Jan 5, 2011
I have a command which on the command line needs to look like this
rlam -if3 '!pvalue -H image1.jpg' > image2.jpg
Nevermind what rlam or pvalue do ... they are part of a program package I am using. The above command works on the command line, and also when written verbatim in a bash shell script.
My problem is: in the script I wish to replace image1.jpg with the content of a variable, e.g.
IM1=image1.jpg
How to I get the script to insert the value of $IM into the command when the pvalue part of it needs to be quoted?
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Dec 2, 2009
I want to make a very simple bash script to run a command for a user-specified number of seconds and then kill it. The purpose is to limit the amount of time the program runs.Example in pusedocode:
Code:
#!/bin/bash
#$1 is the user input number of seconds
[code]...
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Mar 8, 2011
need to modify some scripts to repeat the commands in them until a variable returns a proper value. I need it to add some redundancy to some scripts i use to upload files to a remote server.This is an example of a portion of those scripts:
Code:
################## site UPLOAD ##################
site_login=$(curl -c $site_cookie -L -F user=$site_user -F pass=$site_password -F
[code]....
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Jun 14, 2010
I am running a simple script that I copied from slug.ceca.utc.edu/docs/2009-3-26-linux-server-health.pdf and edited with the names and paths of my own servers. I don't know much about scripting (re: nothing) but I wanted to try and be efficient in my new role as a Linux Sys Admin. The script was saved to root's home directory and runs as part of root's crontab once a week. The script runs with no problem, but it doesn't actually seem to run all of the commands contained within. It skips some in the middle and the end and I don't know why. The script itself is this:
Code:
#!/in/bash
uname -a > /tmp/server.txt
[code]...
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Jan 15, 2010
I've got an annoying problem that 'man' and some other commands do not auto-complete (via TAB). e.g. typing: man rsyn (TAB, TAB, TAB, etc) will not auto-complete to 'man rsync' however, if i 'sudo -s' & then try the above, 'man' auto-completes everytime. (Directories always auto-complete successfully) My ~/.bashrc contains:
Code:
# enable bash completion in interactive shells
if [ -f /etc/bash_completion ] && ! shopt -oq posix; then
. /etc/bash_completion
[code]....
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Feb 19, 2010
I am having some weird problems with calling commands stored in a variable (I need to do this to assemble a command with a bunch of parameters automatically and then execute it).Example code that will replicate the weirdness:
$ echo "hello world" > "test file.txt"
$ cat "test file.txt"
hello world
[code]....
I would expect the output to be:
hello world
What happens to the quotes? I have tried various combinations of single quotes, escaped quotes, etc, but it seems like quotes in a variable are not evaluated as quotes when that variable is executed.
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