Programming :: Bash Script To Test For Open FTP Sessions From Specific Clients?
Apr 8, 2009
I look after a server which accepts automatic overnight PASV FTP uploads from remote clients. When the uploads are complete, my Bash script copies the files to another location. The problem is, my script needs to be a bit smarter when it comes to detecting active FTP sessions.
I was using:
Code:
netstat -n | grep ":21 " | grep ESTABLISHED
to test if there were active sessions, but came unstuck when a local user left an unrelated FTP session active. The result - my script hung around all night thinking there was an active upload from a remote client. My server is behind a firewall, so remote clients all show an internal (NAT) address,so I can't differentiate by source IP address.I can't install LSOF or FUSER for security reasons. Is there a way I can test for active FTP sessions from specific users? I am running Red Hat Enterprise Linux Server release 5.2 (Tikanga).
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Oct 20, 2010
I have several users on handhelds and they like to let their sessions time out. Their zombie processes then cause record locks.I've come up with calls for killing the pids for any prior sessions started by a given user. This procedure would be executed in the .bash_profile.
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Jan 28, 2010
I am fairly new to bash scripting, and I am trying to test a variable against a number range (1-3). This is what I have used so far: The user enters a value, then
while [ "$PROV" != "1" ] && [ "$PROV" != "2" ] && [ "$PROV" != "3" ] && [ $COUNTER -lt 4 ] || [ -z "$PROV" ] && [ $COUNTER -lt 4 ]; do
clear
echo
[code]....
Is there a cleaner way to do this? Something like:
while [ "$PROV" != "1-3" ]&& [ $COUNTER -lt 4 ] || [ -z "$PROV" ] && [ $COUNTER -lt 4 ]; do
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Oct 21, 2010
I have a directory with files like this:
Code:
And what I'd like is to have the files renamed like this:
Code:
How could I code it so that it removes the numerical part of the filename (at the beginning), even with different patterns (like the 01 - artist vs the 01-artist)?
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Mar 8, 2011
I use rhythmbox to do download my podcasts and I'd really like to automatically sync the new files to my phone when I attach it.The phone mounts as an external drive so I was kind of hoping to write a script that would run automatically when the drive mounts.
I would want it to delete files on the phone that are not present on the computer.Can anyone help me with the syntax for both the bash part and the correct rsync command?
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Aug 29, 2010
Trying to create a small script that will read user's input, test if user entered some input and if not display some message or display a text using user's input.
The script is the following but i get an error saying "[: 6: =: argument expected"
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Jun 14, 2010
I'm new to bash scripting and I've searched around the forums and Internet for this but haven't had any luck. I've found similar things but not what I need. What I need to do is write a simple script that uses what the user inputs to locate and display where a file is. I would prefer to use locate instead of find since I know that the person I am writing this for has locate on her machine (my mom, who is just beginning with Linux).I'm writing the script to make things easier for her while she learns In this particular part of the script I would like to be able to have the script prompt to enter the file she is searching for, read the her input and then display for her where the file is. I realize it would in most cases be much simpler just to teach her how to use locate, but she is very impatient and this is just a part of the script I will be writing, but I can't figure out how to do this.
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Apr 30, 2010
I have a text file which stores the list of files & dir, I want to get only file's extensions from this file & want to store it in another file.eg, below is the file's contents & from it I want to get the extensions sh, pl & h & want to store it in another file. Also I don't want directory list.
A scripts/services_restarter.sh
A scripts/svn post_commit scripts
A scripts/tmp/
[code]...
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Oct 19, 2010
I want to delete all files within a specific folder without actually deleting the folder, what is a good bash command for this?. I found this one but encountered some errors even though I am executing it within the specific folder:
useratdebian:/home/user/folder# find . -type f -exec rm -rf {} ;
[1] 5052
useratdebian:/home/user/folder# find: missing argument to `-exec'
[1]+ Exit 1 find . -type f -exec rm -rf
The command as it appears is:
find . -type f -exec rm -rf {} ;
how to delete only the files contained within the folder called "folder" for example?
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May 3, 2011
I'm trying to call a specific variable based on a user selection. For example:
Code: Select a file:
[1] foo.tar
[2] bar.tar
Enter a selection: I have already coded each possible selection to have its own variable. If the user selects 2 I need to select $SELECTED_TAR2, or if they select 1 I need to select $SELECTED_TAR1 and then do something like this behind the scenes:
Code: cp /home/user/$SELECTED_TAR2 /home/user/backup/$SELECTED_TAR2
I was thinking something like this:
Code: echo "Enter a selection: "
read -e SELECTED_NUMBER
cp /home/user/$SELECTED_TAR$SELECTED_NUMBER /home/user/backup
[code]....
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Aug 11, 2010
I would like to parse an input file in which there are two columns per each row. We want to see how many lines are duplicated where we define duplicate to be having the same second field and different first field. For instance if the input file looks like the following:
79874 13131
79873 12309
79820 13131
[code]...
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Feb 27, 2009
I am looking at ways in which I can restrict the SSH session requests come by specific SSH client (say Putty or NX Client). Is it possible to restrict SSH client login to a client application?
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Dec 12, 2010
How do I use bash to open a file, (file name as first parameter) cut n char from begin of each line, and write shortened lines to new file (outputfile name as the second parameter, n as the third parameter)
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Nov 17, 2010
I am working on a x86 target running fedora 9.
Whenever I reboot it, my history returns to some state, and I do not have commands I did in the sessions before the reboot.
What I have to change to have updated history I had before reboot?
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May 3, 2011
I am relatively new to scripting, but I was wanting to open a firefox window from a bash script, but have it open, then minimize. In the script, I have a single instance of: firefox & but is there a way to minimize it, versus have it displayed on the screen? I was wanting the command terminal to remain visible and it can't since the firefox window is open in front of it. I looked all over the place, including the man pages, but to no avail. I can make the height and width changes, but no minimize. Either that, or to be able to bring the terminal window back to the front automatically.
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Oct 18, 2009
How will I allocate specific bandwidth to clients using squid? I use squid on RHEL5 serer ...
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Apr 14, 2009
I'm starting to like making bash scripts. It's kewl making creative ones. Right now I'm trying to make a bash script that will open up port 23 for a netcat connection. Once there's a connection, I'd like for the script to open up xmms and play a sound effect, as well as echo a txt file to the desktop saying that a connection was made at this specific time. When I execute the script, it stops exection at the first line. So far I have this:
sudo nc -lvnp 23
while [ 1 ]
do
[code]...
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Jul 11, 2011
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.
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Jan 27, 2011
I've used NoMachine's NX software for some time, but on one of my machines it simply will not work. At first it did, but now when I log in it authenticates, starts downloading a session, but then drops dead. There is no hint of what the problem may be except in /var/log/messages on the server machine:
User 'bill' from '192.168.1.1' logged out. 'NXLogin::reset'
Notice that it's a login reset, after authentication went fine. Researching this I find the problem is often caused by a missing fixed font, which is remedied with an: # apt-get install xfonts-base --reinstall but that doesn't help. I have completely deinstalled and purged the three Nomachine packages on the server, deleting all associated directories, and reinstalled them, but no help. From my client machine I can log into a NX session just fine, so I'm sure it's not the client machine. The Linux version of this software has a limit of 2 sessions, and I suspect the server may have some bogus sessions open, but where? I've done a purge and deleted /usr/NX and /home/bill/.nx so where else could this be?
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Jan 15, 2011
I am trying to write a bash script that would save the current state of my konsole terminals and sessions. I'm using KDE3.X and for some reason the "profile" save does not save the current working directories... Anyway, I would like to know if there is an elegant way to obtain the current workdir of each terminal and session ? I've managed to do something with a clever use of DCOP extended functions, but it requires me to start every konsole with the --script option enabled, and I don't want to do that.
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Jul 24, 2010
I need to search a bunch of files in a specific folder for a specific number and add all the numbers together to a total sum. I use Rsync everyday, everytime I run rsync i get a logfile (rsync output) witch contains the textstring "Total bytes sent: xxxxxx".
The "xxxxx" can vary in lenght. I need to extract the "xxxxxx" from each file and add the numbers together to a total size over a week or a month. Is this possible? And I wish to only use bash. One way of doing stuff at a time my friends .
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Sep 1, 2011
Is there a way to determine the time of last reboot and open all sessions and/or files that were open with a BASH script?
Oh also on this topic, does anyone know where a good repository of BASH, PERL and other Linux System Scripts are?
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Jul 19, 2010
I want to replace specific character in a file after every specific line. example as follows.
O 000000000000000000
A 111111111111111111
C 222222222222222222
[code]...
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Dec 18, 2010
I want to test whether or not my phone is connected from bash. I'm finding lots of information about /dev/rfcomm0, but that's not on my system (Ubuntu 10.04). The device pairs just fine, and I can connect with gammu just fine, and I have the device address ("00:1F:5D:37:17:FB").I just need something I can put in a bash script to say "Is this connected or not" akin to testing for a file's existence:
Code:
if [ -f /home/steven/arbitrary filename ]
then
[code]....
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Sep 4, 2009
I was wondering why
Code:
Is echoing NO even though
Code:
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Sep 28, 2010
A simple TCP based chat server could allow users to use any TCP client (telnet, for example) to communicate with each other. For this question you should consider a single process, single thread server that can support exactly 2 clients at once, the server simply forwards whatever is sent from one client to the other (in both directions). Your server must not insist on any specific ordering of messages as soon as something is sent from one client it is immediately forwarded to the other client. As soon as either client terminates the connection the server can exit
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Jan 10, 2010
I just created a website in PHP and tested on my own webserver. All of my session variables worked great. Today I uploaded it to my commercial server host and it does not remember the session vars from one page to the next. Here is the session section of phpinfo().
Code:
session
Session Support enabled
Registered save handlers files user sqlite
Registered serializer handlers php php_binary wddx
DirectiveLocal ValueMaster Value
session.auto_startOffOff
session.bug_compat_42OnOn
session.bug_compat_warnOnOn
session.cache_expire180180
session.cache_limiternocachenocache
session.cookie_domainno valueno value
session.cookie_httponlyOffOff
session.cookie_lifetime00
session.cookie_path//
session.cookie_secureOffOff
session.entropy_fileno valueno value
session.entropy_length00
session.gc_divisor100100
session.gc_maxlifetime14401440
session.gc_probability11
session.hash_bits_per_character44
session.hash_function00
session.namePHPSESSIDPHPSESSID
session.referer_checkno valueno value
session.save_handlerfilesfiles
session.save_path/tmp/tmp
session.serialize_handlerphpphp
session.use_cookiesOnOn
session.use_only_cookiesOffOff
session.use_trans_sid00
You can see that session.save_path is set to /tmp, which is the default on the shared server. /tmp does exist in my document root directory.
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May 12, 2010
I'm looking for a script which is testing how complex an "added" string is, for example like the user is changing his password and check how complex it is, if it included letters (lower/upper case), numbers and other characters.Im doing this for password check, the user type's the password and must be 6 characters long, have upper case letters lets say and numbers and so on.If anyone knows where I could find some bash script which is doing this, it would be really cool.
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Nov 8, 2010
Cis 140 student.how to use the test command to evaluate whether the shell variable I create contains a referance to the bash shell? and use the echo command to determine the result.
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Apr 1, 2011
in my office we are using redhat server and 20 windows client machine. some times while viewing the server stored files or not able to view.yesterday i saw a problem all the files are showing but not able to open a single fine after restarting the computer iam able to open the file.
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