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  • Random password generator: many, in columns, on command line, in Linux

    - by Adam Backstrom
    A while back, I came across a random password generator for the command line that displayed a grid of "memorable" passwords. Output was something like this: adam@host:~$ CantRememberThisCommand lkajsdf aksjdfl kqwrupo qwerpoi qwerklw zxlkelq The idea was that you could run this utility while someone was looking over your shoulder, and still pick a password with some level of secrecy due to the large number of choices. I cannot remember what this utility was called. Oh interwebs, can you help?

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  • Automatically mount partition when needed

    - by David Parunakian
    Hello, Can anyone suggest a method of mounting a partition (e.g. an NFS share) when a user changes into the directory it is set to be mounted to, and not on the system startup? So far I've been unable to propose such a method, aside from editing BASH built-in cd implementation and forcing an fstab/mtab check before the working directory is actually changed.

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  • Using SSH, transfer webURL to remote machine

    - by AlanTuring
    Hi so i was doing some research in the library so i could use some pictures later on my Desktop computer in my room. I have space on my Lab account which i usually SSH into, and i was wondering if URL's can be directly transferred over to a remote machine and saved on the hard disk. I was thinking something like this: scp http://click.si.edu/images/truncatedurl.jpg /home3/etc.../filename.jpg is this possible? Thanks in advance.

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  • linux shell utils: convert a list of hex to list of decimals

    - by osgx
    Hello How can I convert a file with a lot hex numbers into the decimal? Example: file1 0x59999 0x5acdc 0xffeff I want to start $ cat file1 | util | cat file2 and get file2 with smth like 1021489 1249230 3458080 (numbers in example output are random, as I cant convert so long hex to dec) Upd: perl : perl -pe '$_=hex;$_.="\n"'. Can anybody do it better? The real task is a sorting of hex numbers.

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  • Cron process not starting

    - by vkris
    I have an ec2 image created with cron jobs. These jobs fail to run; I discovered the cron process in itself has not started. So, I included /usr/sbin/cron in /etc/rc.d/rc.local and created another image. But still for some reason the cron process does not start on bootup. If I restart the machine, the cron process runs. It doesn't run when it boots up! Any reason why this is happening? Also, is there any other alternatives for this ?

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  • BASH - Run command for each line in output of previous command

    - by user1582375
    All, I am want to request all network services using: networksetup -listallnetworkservices I then want to run the below command for each line in produced from the above command: networksetup -setautoproxyurl "A LINE FROM ABOVE" http://etc... Adiitonally, I only want to issue the setautoproxyurl command for service with "Ethernet" or "Wi-Fi" in the name networksetup -listallnetworkservices | while read line; do networksetup -setautoproxy $line http://etc...

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  • How to execute a command whenever a file changes?

    - by Denilson Sá
    I want a quick and simple way to execute a command whenever a file changes. I want something very simple, something I will leave running on a terminal and close it whenever I'm finished working with that file. Currently, I'm using this: while read; do ./myfile.py ; done And then I need to go to that terminal and press Enter, whenever I save that file on my editor. What I want is something like this: while sleep_until_file_has_changed myfile.py ; do ./myfile.py ; done Or any other solution as easy as that. BTW: I'm using Vim, and I know I can add an autocommand to run something on BufWrite, but this is not the kind of solution I want now. Update: I want something simple, discardable if possible. What's more, I want something to run in a terminal because I want to see the program output (I want to see error messages). About the answers: Thanks for all your answers! All of them are very good, and each one takes a very different approach from the others. Since I need to accept only one, I'm accepting the one that I've actually used (it was simple, quick and easy-to-remember), even though I know it is not the most elegant.

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  • shell pipe behavior with MySQLDump

    - by unknown (google)
    I am using mysqldump for a large database (several GB) and import the result from a pipe, please see commands below, does it do incremental pipe, or wait until the first one finishes then import? is this a good way of importing large db across servers? I know you can export gz it, then pscp it then import. Quick alternative are welcome mysqldump -u root -ppass -q mydatabase | mysql -u root -ppass --host=xxx.xx.xxx.xx --port=3306 -C mydatabase

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  • Shell script to fix bad filenames? [closed]

    - by Ze'ev
    I'm IT at my small firm; and, despite my dire warnings, everyone puts files on the server with awful names, including leading & trailing spaces, bad characters (including \ ; / + . < > - etc!) They do this by accessing the (FreeBSD/FreeNAS) server via AFP on Macs, so no part of the system complains. Is there a script I can use to go through an entire directory tree and fix bad filenames? Basically replace all spaces & bad ASCII with _ ... and if a file already exists, just slap a _2 or something on the end. I don't suppose there's a way to get the system to enforce good filenaming conventions, is there?

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  • Shell script to block proftp failled attempt

    - by Saif
    Hello, I want to filter and block failed attempt to access my proftp server. Here is an example line from the /var/log/secure file: Jan 2 18:38:25 server1 proftpd[17847]: spy1.XYZ.com (93.218.93.95[93.218.93.95]) - Maximum login attempts (3) exceeded There are several lines like this. I would like to block any attempts like this from any IP twice. Here's a script I'm trying to run to block those IPs. tail -1000 /var/log/secure | awk '/proftpd/ && /Maximum login/ { if (/attempts/) try[$7]++; else try[$11]++; } END { for (h in try) if (try[h] > 4) print h; }' | while read ip do /sbin/iptables -L -n | grep $ip > /dev/null if [ $? -eq 0 ] ; then # echo "already denied ip: [$ip]" ; true else logger -p authpriv.notice "*** Blocking ProFTPD attempt from: $ip" /sbin/iptables -I INPUT -s $ip -j DROP fi done how can I select the IP with "awk". with the current script it's selecting "(93.218.93.95[93.218.93.95])" this line completely. But i only want to select the IP.

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  • why run a Linux shell command with &?

    - by George2
    I am using Red Hat Linux Enterprise version 5. Sometimes I notice people run command with a couple of & options. For example, in the below command, there are two &-signs. What are the function of them? Are they always used together with nohup? nohup foo.sh <parameters to specific the scripe> >& <log_file_name> & thanks in advance, George

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  • Most effective way to change Linux command prompt for all users?

    - by incredimike
    I have several machines and the hostnames are really long.. i.e. companyname-ux-staging-web1.companyname.com. So my prompt looks something like [root@mycompany-ux-staging-web1 ~]# I'd like to shorten that up for all users on all machines with the least amount of work. From what I read I have a couple options, but they all have their drawbacks. I could change the hostname, but that would likely affect applications. Not a great choice. I could alter also $PS1 at login for all users by editing all .bashrc for existing users, and edit /etc/skel/.bashrc for potential new users. That's a lot of work across 10 machines. What's my best option or what have I overlooked?

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  • How can I tell when an FTP is complete?

    - by identry
    I have a cron job that processes files that my client's upload via FTP to my FreeBSD server. The cron job runs once an hour, and normally processing each file only takes a few seconds. The cron job looks in the client's upload directory and moves any new files to a tmp directory. It then processes the file(s) and moves them into a final directory where they are then available to the public through a website. The problem is, every once in awhile, the cron job runs just as a new file is being uploaded. It moves the half-uploaded file to the tmp directory, and tries to process it, and fails, of course. Question: how can I determine if the uploaded file is complete? The only thing I can think of is checking the file size to see if it's changing, but that seems like a kludge. Is there some sort of flag or something that is set when the upload is complete?

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  • [UNIX] Sort lines of massive file by number of words on line (ideally in parallel)

    - by conradlee
    I am working on a community detection algorithm for analyzing social network data from Facebook. The first task, detecting all cliques in the graph, can be done efficiently in parallel, and leaves me with an output like this: 17118 17136 17392 17064 17093 17376 17118 17136 17356 17318 12345 17118 17136 17356 17283 17007 17059 17116 Each of these lines represents a unique clique (a collection of node ids), and I want to sort these lines in descending order by the number of ids per line. In the case of the example above, here's what the output should look like: 17118 17136 17356 17318 12345 17118 17136 17356 17283 17118 17136 17392 17064 17093 17376 17007 17059 17116 (Ties---i.e., lines with the same number of ids---can be sorted arbitrarily.) What is the most efficient way of sorting these lines. Keep the following points in mind: The file I want to sort could be larger than the physical memory of the machine Most of the machines that I'm running this on have several processors, so a parallel solution would be ideal An ideal solution would just be a shell script (probably using sort), but I'm open to simple solutions in python or perl (or any language, as long as it makes the task simple) This task is in some sense very easy---I'm not just looking for any old solution, but rather for a simple and above all efficient solution

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  • "Bootstrap" python script in the Windows shell without .py / .pyw associations

    - by PabloG
    Sometimes (in customer's PCs) I need a python script to execute in the Windows shell like a .CMD or .BAT, but without having the .py or .pyw extensions associated with PYTHON / PYTHONW. I came out with a pair of 'quick'n dirty' solutions: 1) """ e:\devtool\python\python.exe %0 :: or %PYTHONPATH%\python.exe goto eof: """ # Python test print "[works, but shows shell errors]" 2) @echo off for /f "skip=4 delims=xxx" %%l in (%0) do @echo %%l | e:\devtools\python\python.exe goto :eof ::---------- # Python test print "[works better, but is somewhat messy]" Do you know a better solution? (ie: more concise or elegant)

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  • Which book for windows Shell programming?

    - by serefarikan
    I've been looking for a good book for windows shell programming, and the only one I could find is Visual C++ Windows Shell Programming by Dino Eposito: http://www.wintellect.com/BookInformation.aspx?ASIN=1861001843 It is an old book, and I'd like to know if you know of any good resources which could help. I need to develop a couple of windows explorer extensions, and apparently managed code is not recommended by Microsoft at least for some of these tasks. So I'm searching for a good resource for native development. Kind regards Seref

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  • In a bash script echo shell commands

    - by user343547
    In a bash script how do I echo all shell commands called and expand any variable names? For example, given the following line: ls $DIRNAME I would like the script to run the command and display the following ls /full/path/to/some/dir The purpose is to save a log of all shell commands called and their arguments. Perhaps there is a better way of generating such a a log?

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  • UNIX script to convert queries

    - by Harish
    I need a UNIX shell script to convert my queries from Java compatible to Oracle compatible format. ie. I have all the java compatible queries: java: SELECT a, b, c, d, e, f,g "+// "from test where year(timestamp)=year(today) and month(timestamp)=month(today) " +// "and day(timestamp)=2 and h='" + "W" + "'" Oracle SELECT a, b, c,d,e,f,g from test where year(timestamp)=year(today) and month(timestamp)=month(today) and day(timestamp)=2 and h='W' Is it possible using sed or awk?

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  • Stop execution of python script when parent Bash shell script is killed

    - by jrdioko
    I'm working on a Bash shell script that runs several Python scripts like so: cd ${SCRIPT_PATH} python -u ${SCRIPT_NAME} ${SCRIPT_ARGS} >> $JOBLOG 2>&1 At one point, I killed the shell script (using kill PID), but the Python script continued running, even after the script terminated. I thought these would die as soon as the main script died. What am I misunderstanding about Bash scripting, and what can I do to get the functionality I'm looking for? Thanks in advance!

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  • Mac OS X - run shell script from the desktop GUI

    - by dreftymac
    You can create a shell script or a Python or Ruby script and run it on the Mac by using "Terminal" ... if you have Finder open, and you click on the icon for the file containing the source code of a saved shell script, is there a way to have that script run, instead of opening in my text editor ?

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  • read the contents of a directory using shell script

    - by jrharshath
    Hi, I'm trying to get the contents of a directory using shell script. My script is: for entry in `ls`; do echo $entry done However, my current directory contains many files with whitespaces in their names. In that case, this script fails. What is the correct way to loop over the contents of a directory in shell scripting? PS: I use bash.

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