General :: Bash_history File And Running Bash On Multiple Windows?
May 5, 2011
Despite the history file is unique (~/.bash_history) I see that the multiple bash processes run on different windows are not all updating that file. I presume that the bash is not taking into account this possibility (multiple bashes on multiple windows) and writes thus the history file in a simple straightforward way. This would mean that a number of history entries are lost. I've tried to find information but had no luck so far.
I am in the process of running some benchmark tests on a variety of RDBMS, I am testing three different client operating systems.Would it be terrible to partition the HDD and install Ubuntu, Windows 7 and Solaris 10? If I do not do this, I will likely have to re-install the O.S numerous times due to changes in the database server o.s as well. The same question goes for the server; would it drastically effect the performance to install 3 server o.s on one server?
I've searched everywhere and I can't come up with a good solution. For each line I need to find the average, min, and max. I've seen plenty of solutions where the number of columns is fixed, unfortunately for me these lines can get pretty large. My thought was to read each line individually into an array, loop through the array and find the avg, min, and max that way but i haven't had much luck. I can read each line using a while loop but I'm having trouble with the array part, or perhaps that's not the best solution?
I am trying to write a bash script to open 1 screen session with multiple windows... each one running a different service. Is this possible? I tried several things, and I can start up multiple sessions really easy.. but not 1 session with multiple windows...
I want this so I can attach to that session and quickly move between the different windows.
For example, I have a text file with data which lists numerical values from two separate individuals
Code: Person A 100 200 300 400 500 600 700 800 900 1000 1100 1200
Person B 1200 1100 1000 900 800 700 600 500 400 300 200 100
How would I go about reading the values for each Person, then being able to perform mathematical equations for each Person (finding the sum for example)?
I am trying to think of a logic where my file contains some data I had to read and do some processing. Issue is that file contains data multiple times. For example:
::::::::::: var1=value1 var2=value2
[code].....
I have to read first paragraph of variables and do some processing and then move on until the end of file. Variable names are same in whole file but for each paragraph the value is different. I can't think of a logic to attain this task. How can I do it? It should be a simple bash script, but I am not able to work out.
I create a bash script that writes another bash file. But in the generated bash file I want to write a bash command in the file and not executing it.Here's my bash file:
Code: #!/bin/bash cat > ~/generateGridmix2data.sh << END
I have written quite a few separate bash & scripts and php scripts that up to now I have run from cron jobs. However I have to estimate how long each takes to run, before running the next and so it probably takes much longer than necessary to run them all. They have to run in order.
Now there are so many I am thinking it would be better to have a master bash script that would run one after the other, but I am not sure how to get the master script to wait before starting to run the next script. Is this possible and is there a command that will make the script wait between bash and php scripts , for them to finish, before running the next?
I have 5 FTP users that upload files (and subdirectories) in their home directory, i need to mirror theese directories beetween them and with a "master" directory (accessible from a 6th user). Files can contain spaces or others special caracters. All the files are in the same filesystem, and i want to use hard link because i don't want to waste 5 time the space of a single file. I tried with find but i cannot handle spaces in it.
Right now i have some code to catch the inputs, using a variable "z":
Code:
Then:
Code:
I'm almost positive that the problem is in the bolded line above (for one thing, it always leaves off the initial "-e"). So basically i want a string that gives me "-e input" and concatenates as many times as necessary.
I created text for a bunch of "#!/bin/bash" scripts in MS SQL Server. Being on a Windows machine, I used Ultraedit to create text files for a few examples. After copying the files to a machine running Ubuntu 10.10, I changed group and owner, and made them executable. However, they won't execute. I get "file not found" errors. But, if I paste the content into text files created in Ubuntu, it runs fine.
I have a hardware audit script I want to run on several remote machines around my office. Is there a way to run the script that resides on my machine via ssh or do I need to copy the script to the local machine and then run it...
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?
I've written a script (that doesn't work) that looks something like this:
#!/bin/sh screen -dmS "somename" somecommand for i in {0..5}; do screen -dmS "name$i" anothercommand $i done
For some reason, if I copy and paste this into a terminal, it creates 7 detached screen sessions as I expect. If I run it from within a script, however, I get only the first session, "somename," when I run screen -ls.
Edit: If the same can be accomplished another way (e.g. with multiple screen windows instead of sessions), I would be open those solutions as well.
First post from a very new Linux user....I am trying to create a BASH script that will allow user to provide multiple directory names, Checks if the directory exists and if not create the directory.
I am using the following code:
Which works fine as long as the user enters a single directory name. How can I modify this so it will process all directory names user enters on the read response?
Is there any way to have x server on multiple shells at a time?(eg. Sally is logged in on shell 6 with her own desktop cube while Rob is logged in on shell 7 with his own desktop cube, etc)
I know I have to count how many instances are running: ps x | grep apache2 | wc -l result if it's running: 2, or else: 1 I also know there is a command called test that I could use to perform the verification, but I don't know how to use test with wc
so I wrote a small script that pretty much just takes in two numbers and counts from the first to the second, e.g.
unknown-hacker|544> count.sh 1 3 1 2 3
My problem is I want to make it so that if you input invalid parameters, such as non-numerical characters, more than 2 numbers, etc., you'd get an error message
I've been trying to write a bash script called runSorter.sh that runs an executable that also takes in some parameters and outputs the results to a text file. The executable, sorter, takes in a number parameter. I want to make it so that you can input as many number parameters into runSorter.sh as you want and it will run the sorter executable for each one. So far, what I have looks like this:
#!/bin/bash args=("$@") INDEX=0 if [ -z args ]; then echo "Error" else while [ $# -gt $INDEX ]; do NUM=${args[$INDEX]} echo $NUM echo ./sorter $NUM let INDEX=INDEX+1 done fi
My problem is that when I run ./run-sorter.sh 100 on my terminal, it just prints this to the screen: ./sorter 100 How can I have so that it properly executes sorter and outputs everything to a text file?
I am a newbie in linux. I tried to write an autorun bash script on /root and select System-Preferences-More Preferences-Sessions-Startup Programs-Add.But the bash script seems like not working. Following is my bash script:
I have a bash script that messages the user periodically. Is there any way in the script to check if the screensaver is running, so the script doesn't spam messages while the user is away? The xscreensaver process is always running in the background, I've noticed.
I have a remote directory shared over NFS called tech with perms set as 0750 and owner set to root:tech. I have 2 groups: tech, and techAdmin. tech can read and execute within tech/. techAdmin can read, write, execute. I have 4 users: user1, user2, user3, user4. user1 and user2 is a member of techAdmin, user3 and user4 are members of tech. simple so far...but wait here's the problem. If user1 creates a file inside tech, user2 cant read or modify it because user1 owns it. Here's a few sites that reference this problem:
Performing commands in multiple subdirectories simultaneously. I'd like to run a program I've copied into every subdirectory which takes *.in files in the current directory as input files. I can find the program, but how do I tell it to run when I've found it?
In a script I am writing I am trying to add logic so that the script can figure out if a remote server uses rpm or dpkg and then run the appropriate command to print a list of installed packages. This works locally, but I need to get it to work through SSH and I have no idea how to do that. The relevant portion of the script is below. It would also be nice to find a way to not need the full path to the executables but I'm not real concerned about that.So anyone know how to make this code work via SSH?
Code: if [ -x /usr/bin/dpkg ]; then dpkg --get-selections
