Bash is a free shell for Unix-like operating systems from the GNU Project.

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Command fails in a script? [closed]

I'm trying to script the OpenSSL ec command. The script is used to validate a collection of keys produced by another library. The script is shown below after the question. The following works from a ...
0
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1answer
114 views

CentOS 6 - Send user defined command from PHP

I have a web control panel and I need my allow my users to send commands to their application. I a similar problem to SQL injection. $user_input='good command'; shell_exec('tmux send-keys session1:0 ...
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1answer
52 views

how to retrieve following error when i execute shell script

I have one script to log into remote server.But i tried to Execute the script some error occur. Logs: My script: #!/bin/bash S1=$(ssh -t selvam-odc-shell1 "users | wc -w ") S2=$(ssh -t selvam-odc-...
2
votes
2answers
2k views

How to download an image with wget and save it with the md5 hash as name?

How can I make a download an image, md5 hash the image, and save that image with the md5 hash as name to a directory using wget? # An example of the image link... http://31.media.tumblr.com/...
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1answer
1k views

ipython notebook can't find python

I had a couple of Python 2 versions under home-brew. Since I was only using ipython notebook, I decided to uninstall all Python 2 instances, which turned out to be a bad idea because now I just get an ...
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1answer
2k views

Batch convert txt file encoding

I have about 700 files that were the results of a closed caption software process. I can open the files on my PC or Mac in a GUI, but when I open it on the server with nano, I get this: ��0^@0^@;^...
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2answers
639 views

Can bash wildcards specify negative matches?

In bash is it possible to use wildcards to specify "all files in current directory EXCEPT [files matching a specific (wildcard) pattern]"? Eg, "all files which don't match *~" Or more generally, is ...
1
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1answer
325 views

Is it possible to open a port for listening without netcat?

I have a need for a Linux system to listen on a TCP port and dump what it receives to a file and/or stdout. The system does not have netcat installed. I have root permissions, but am not allowed to ...
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0answers
122 views

curl won't shut up (--silent does nothing)

I'm writing a quick shell script, and I cannot for the life of me get curl to suppress the progress bar. The relevant line looks like this: curl http://website -o $temp >/dev/null 2>&1 ...
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0answers
111 views

popd and pushd behavior with “-n” option

I've been experimenting with pushd and popd in bash (Cygwin, man page says "GNU bash 4.1") and the man page doesn't quite seem to match the behavior. For pushd, the command % pushd +1 both ...
1
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1answer
46 views

Different globbing behavior with same shopts?

I have multiple shells (bash) open on the same machine, and in one of them, globbing seems to have stopped. ls * gives ls: *: No such file or directory, and so on. I figured that I must have set some ...
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3answers
584 views

Redirect stdin to stdout

I've got a script, ex myscript.sh, and it has to redirect to stdout what it gets from stdin (like a cat). For example: myscript.sh < myfile.txt > myfile2.txt How to do this? Also, how can i ...
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1answer
364 views

crontab and binaries in /usr/local/bin

I am working in Redhat and have few programs located in folder /usr/local/bin I would like to call from crontab for root user. I thought that by putting binaries in that folder would be sufficient to ...
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vote
2answers
114 views

Is it possible to combine these two ssh commands into one?

I'm using bash on Mac 10.9.1. Right now, I execute these two commands to ultimately get to the server I want access to ssh me@intermediate and then once logged in, I execute ssh me@destination ...
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2answers
123 views

Get specific point in referer of apache access.log

How can i get referer from apache access.log whitout the "GET" and "HTTP/1.1"? cat $APACHELOGFILE | awk -F\" '{print $2} The Output is: GET /folder/xpto/ HTTP/1.1
2
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1answer
82 views

Using xargs with $() - operator precedence?

Inspired by this question. The original question, in short, is "How to turn all :2f into - in all files within a folder". e.g. If I have a file ./abc:2fdef it should be renamed into ./abc-def. At ...
1
vote
1answer
203 views

What's the deal with terminal colors?

There are 256 terminal color escapes available: 8 "system" colors (0 - 7) 8 "bright" system colors (8 - 15) 216, or 6*6*6 "RGB" colors (16 - 231) 24 "grayscale" colors (232 - 255) The "RGB" colors ...
0
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1answer
3k views

How to make grep command return entire matching line

How can I make the command grep -w show the entire line that contains the match? I need to force pattern to match whole words, but I need to see all of the line. Here is my command: cat /var/log/...
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1answer
347 views

split a file by a line prefix

My data looks like this: 60 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 61 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 62 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 62 ...
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0answers
85 views

Bash script for repeated execution of benchmark

I'm working on a project involved with cloud instance performance. Currently running UnixBench on EC2 instances. For comparison purposes I require a benchmark to be run constantly on one instance. By ...
1
vote
1answer
55 views

writing a script to mail all users online

I am taking my first Linux class and we are writing scripts. Currently I'm trying to write a script that will look at who is online and then send them a mail This is an entry level linux class so ...
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1answer
403 views

Bash files open terminal when opened

This seems like something simple to do but for the life of me I cannot figure out how to do it. I would like all bash (*.sh, *.bash) files to open with a terminal to show their output in.
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268 views

CLI tools/ways for dynamically constructed DOM structure parsing HTML Javascript

I'm planning to make a tool which recognizes HTML using DOM structure in CLI. As many sites produce many DOM elements using JavaScript these days, it's becoming difficult to extract information from ...
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0answers
360 views

mc-wrapper does not exit to MC_PWD directory

I recently installed openSUSE 13.1 and set up the mc in typical why by aliasing mc with mc-wrapper.sh to have it exit into the last working directory in mc instance. However this does not seem to be ...
2
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1answer
988 views

Trouble creating real NTFS links using Cygwin

I have administrator privileges and would like Cygwin's ln -s to make NTFS links instead of the fake !<symlink> files that only Cygwin understands. I tried the following, based on Cygwin ...
0
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1answer
267 views

how come git bash can call java tools (xjc.exe) with unix paths but not cygwin?

From CMD.exe, I can run xjc as follows: xjc "c:/schema.xsd" -p abc -d "temp" From git Bash, I can run xjc as follows: xjc "/c/schema.xsd" -p abc -d "temp" As far as Cygwin goes, I can get it ...
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2answers
925 views

Is it possible for a root user to watch others' shell session secretly in live?

I see a similar question on stackoverflow: http://stackoverflow.com/questions/1353253/linux-terminal-how-to-capture-or-watch-other-terminal-session Someone recommends conspy. However, it seems that ...
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1answer
150 views

Bash doesn't source file unless manually started

bash won't source files from an login terminal unless I manually run bash from a terminal, I have bash (and not sh or dash). When I source a file, it returs errors (like "syntax error near unexpected "...
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votes
2answers
724 views

Checking file names inside a directory with Regular Expressions

I have a list of files inside a directory and I want to make a bash script which uses a regular expression to check if every file name inside it has this syntax: xxxx_xxxx_xx_xx Where x are numbers....
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2answers
427 views

IFS-separated items in loop

It is recommended to use IFS to loop through comma-separated list, e.g. here. But, I see that sentences="Hello World,Questions" IFS=, sentences1=($sentences) # if we comment this line then loop is ...
0
votes
1answer
578 views

Unable to start bash script with shell_exec

I've been googling and trying to solve this problem with my php script for a few days now and I'm hoping someone here can see the problem I'm missing in getting my php script to kick off my bash ...
0
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1answer
286 views

How to capture diff output from find command exec?

I am using Ubuntu (Precise 12.04) I am trying to write some bash script to see if file is changed via awk replace by using diff command. I did a test with the following: #! /bin/bash diff fileA.htm ...
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1answer
340 views

Setting include paths in LSF-bsub

I am running a big job on a HPC. But the installed programs for the job are old versions and I have the new versions in my home directory. I can log in to any node, export the path to the new versions ...
0
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1answer
38 views

Backing up recursively is not copying directories

I have the following line in a script to backup and it is not recursively copying all the directories, it gets the files but just lumps them all together. Can anyone tell me what is wrong with it? ...
1
vote
1answer
313 views

Bash script - Trying get abuse email using whois command

How can I get only e-mail address from output? $ whois $IP | grep @ | head -1 notify: albert@xxx.sig.xxx.tw
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1answer
155 views

How can I delete the oldest directory in a directory?

I am writing a backup programm, and I need to execute a bash command to delete the oldest directory in a specific directory. I have found this command to print the oldest directory: find -type f -...
0
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1answer
229 views

Bash script analyse apache log

I need help with this script This script analyses apache_access.log through a filter.txt, if exist the term in filter the script will do something. My problem i think is in the first command "for", I ...
1
vote
2answers
59 views

Execute a previous command in a shell and get the command directly after

Once, a colleague of mine shown me a very useful method (shortcut?) on a shell (bash? csh?) to, after executing a previous command, automatically show the command after in history. For example, here'...
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2answers
196 views

using 'case $1 in' to read command options- multiple flags after dash, and handling unusual flags?

I am making a bash script which uses both long options and short flags. Since I want long options, I can't use getopts. I tried using the following code: while test -n "$1"; do case "$1" in ...
6
votes
1answer
1k views

How can I redirect OS X dtruss output when running with sudo?

I'm running dtruss on Mac OS X 10.9. Simple example is: sudo -c ls But I'd like to capture the dtruss output into a file. I saw something that suggests that I can do something like: sudo bash -c '...
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vote
3answers
425 views

cygwin's chmod behaves as working, but it does not work

My Cygwin installation is behaving strangely: chmod does not work. [09:45 Administrator@DellIns14 ~] > ls -ls /usr/bin/chmod 64K -rwxr-xr-x 1 Administrator None 38K Feb 6 2012 /usr/bin/chmod [...
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1answer
385 views

Using /usr/bin/env to change directory [closed]

I want to automatically execute commands with the prefix /usr/bin/env $/usr/bin/env composer install (this runs OK) $/usr/bin/env cd public (failed ---> /usr/bin/env: cd: No such file or directory)...
0
votes
1answer
314 views

'localhost' stoped working as an alias for '127.0.0.1' for SSHing into my VirtualBox VM from OSX. Why, and how to fix?

The question explains the problem. For months I've never had any problems along these lines. Then, yesterday morning, I couldn't get into my VM! Took a long time to troubleshoot but here was the ...
1
vote
1answer
1k views

linux: monitor logfile for a string and execute script

I want to monitor a logfile (syslog) on my linux debian box. So if there is a new entry with a secific string, i want to execute a script. The strings are "alarm start" and "alarm end" So it should ...
0
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1answer
130 views

Run a command on every file in a directory, changing the output name

I need to compile all of the C files in a directory into seperate outputs... see example gcc -Wall program1.c -o program1.out How do I do this?
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2answers
144 views

Piping Several commands in a BASH shell

I am trying to recursively loop through a directory which contains numerous other directories and files and then find all the .rb files and copy them to another directory. This is what I have so far ...
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0answers
99 views

Bash Script Display Remote Screen Session to User

I'm kind of new to bash scripting and I'm having trouble figuring out how to accomplish this. I'm working on a script that is designed to backup and manage a java application that runs within a ...
0
votes
1answer
954 views

Do I have to manually update my PATH in Cygwin shells?

I use Cygwin on Windows 7. I'm not really a Windows user, so it's already a little inconvenient for me to have to have this extra layer in between my OS and Zsh, my shell of choice. Now, I frequently ...
7
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4answers
866 views

Terminal: prefix previous command?

Frequently in Terminal (though I fully expect any answer will work in bash and most others), I type some command, and then get some sort of permission error due to missing sudo. Okay, so press 'up', ...
0
votes
1answer
1k views

Command Line: Browse to a network path that has spaces and a single quote

I am trying to browse to a network path in dos that has both spaces and a single quote. When I do: net use "\\server\path's name\folder\" I get an error message that error 53 has occurred. Any ...