Questions about shell scripts, executable files that are interpreted by a shell (bash, zsh, etc.).

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1
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1answer
60 views

linux pgrep by excluding specific user

I'm using pgrep command on a shell script to monitor some java application. But there is a continues service from java which is giving problem on my code. That process belongs to another user. So, is ...
2
votes
1answer
598 views

Bash : syntax error near unexpected token ' done '

I wrote this script #!/bin/bash if [ $# -ne 2 ] ; then echo "\n Usage : sh $0 BSSID interface \n" exit 0; fi while true; do reaver -b $1 -i $2 -vv -N -g 10 -S -a sleep 3603; done ...
1
vote
0answers
17 views

Submitting a script to TORQUE `qsub`: PBS lines before or after shebang line?

I am submitting a script to a cluster that uses TORQUE. Should I add the #PBS lines before or after the shebang line?
16
votes
7answers
904 views

How to efficiently generate large, uniformly distributed, random integers in bash?

I have been wondering what would be the best way to get good randomness in bash, i.e., what would be a procedure to get a random positive integer between MIN and MAX such that The range can be ...
0
votes
2answers
58 views

7z from bash script won't exclude directories

I've encountered with kinda strange behaviour of 7z (or bash, I don't know yet.). With the following script: #!/bin/bash find /home/user -type f -name "*.pdf" | cut -c 10- > ...
2
votes
1answer
142 views

Shell command works locally but does not get parsed correctly through ssh

If I execute the following shell command locally, I get the expected result: adb -s 123456789 shell "su -c 'mount -o remount,rw /system;rm -r /system/app/MyApp.apk;cp /sdcard/MyApp.apk ...
3
votes
1answer
38 views

Why do I get an error when double quoting single quotes in a script that launches a remote SSH command?

I have this script: port=$1 cmd=$2 ssh root@127.0.0.1 -p $port "'"$cmd"'" When running myscript.sh 1000 "ls /dev/shm" it get this error: bash: ls /dev/shm: No such file or directory In the ...
1
vote
0answers
141 views

extracting data from a log file and plotting it using Gnuplot

I have a logfile with the following data in it: Sat Sep 20 11:25:01 BST 2014 -- temp=53.0'C -- message from script /usr/src/scripts/wifi_test_2.sh Sat Sep 20 11:26:01 BST 2014 -- temp=53.0'C -- ...
0
votes
2answers
219 views

scp with password and renaming the file [closed]

I need to execute scp command with renaming the file. I have tried with following code: HOST=lnx25 USERNAME=ngqa PASSWORD=xxxxx FILE=$1 FILE_NAME=`echo $FILE | awk 'BEGIN{FS="/"} {print $NF;}'` ...
1
vote
2answers
113 views

Extract text from one iteration of top

I want to execute the top command from my bash script the problem is that usually when I type the top command on the console , I exit by Ctrl+C. but how to exit from top when I run the top command ...
5
votes
2answers
445 views

Using grep in a if-else statement [closed]

Why my code isn't outputting if a string entered isn't in the file. When I enter a string and it isn't in the file, there's no response back, it re-loops back to the beginning. Can someone tell me ...
4
votes
2answers
42 views

More shell scripts than one in one text file?

I am learning shell scripting for my introductory UNIX course at my university, and I`m curious if is it possible to have more than one shell script in one text file. What I mean by that is, for ...
0
votes
3answers
170 views

How to add a password to a specific command

I've been searching google on how to add additional security to a specific command without using sudo. Is it possible to add on a security feature without actually using sudo? For example: Whenever ...
2
votes
1answer
45 views

Single or double brackets and portability

I have found some very good answers here on the differences between [ and [[ in 'if' statements. For specific named shells, it seems to be a good idea to use [[ over [ (and it is faster, too). I'm ...
1
vote
1answer
106 views

Reload .bashrc file for parent shell

I'm creating a script for managing my dotfiles and I want to source my ~/.bashrcfile automaticaly for the current bash. But I found that when in my script write : source ~/.bashrc it will source ...
2
votes
1answer
112 views

Prevent SIGINT from interrupting function call and child process(es) within

Consider the following script: #!/bin/bash set -o pipefail set -o history trapper() { func="$1" ; shift for sig ; do trap "$func $sig" "$sig" done } err_handler () { case $2 in ...
3
votes
1answer
37 views

Preventing mid-word line breaks in a2ps

So I understand that a2ps is mostly for converting ASCII code to postscript for printing, but occasionally I like to print a .txt or .md file for school. Often, an entire sentence (or even a ...
2
votes
0answers
57 views

How to run the dialog command with proccess? [duplicate]

NOTE: Please look at my code, it's a Bash script. I want to display both dialogs on the screen at the same time, one dialog displays this: tail –f from - /var/log/proccess1.log and the second ...
2
votes
1answer
38 views

Comparing delimited fields

I have two fields in a file, students and teachers. They're delimited by a semicolon and I want to find which single students have two different teachers. jdoe;ateacher jdoe;bteacher jsmith;cteacher ...
0
votes
3answers
89 views

Combinatorics of letters and words - preferably bash, will accept perl or other [closed]

I am trying to write a shell script to generate all possible words in the English language less than 20 characters. I doubt there is any truly efficient way to do this other than to brute force some ...
0
votes
3answers
110 views

how to generate only one special character in this password generator

I have a command which generates password with multiple special characters. How can I make it to generate only 1 special character? # Generate a random password # $1 = number of characters; defaults ...
1
vote
2answers
84 views

finding latest date and date modified file and using sed

I have a series of files that contain a date and I need to get the file which has the latest date, and the latest date modification and pipe it to sed. I have tried various approaches and I cannot ...
0
votes
0answers
24 views

Help with creating random passdown [duplicate]

This is the command I am issuing to generate password that has capital and lower case letters numbers, numbers and only 1 special character. I can't get it to work, can some one on what is that I am ...
3
votes
3answers
163 views

Having an issue searching for a string in a file

I have tried to use a 'case' loop but it doesn't work for a reason unknown to me. This is my script for the case loop. echo "Do you wish to search again? [y/n]" read INPUT_STRING2 case ...
-1
votes
1answer
197 views

Commands not found in shell script

I need to execute scp command without using expect command in script. How to use scp with password? I have tried with following code. HOST=lnx1 USERNAME=user PASSWORD=pwd PATH=/sample/data/ FILE=$1 ...
1
vote
2answers
121 views

Pass arguments to a command run by another user

I have a bash script that is supposed to take some arguments and then run in a different user: test.sh #!/bin/bash sudo su user2 <<'EOF' echo $1 EOF However it prints blank: $ ./test.sh ...
0
votes
0answers
35 views

How to get diff for HTML reports?

echo "New defects" echo "===============================" n=0 def_num=0 while read line; do n=$((++n)) if echo $line | grep '^[[:space:]]*>' &>/dev/null; then if [ $(($n % ...
1
vote
0answers
46 views

tput command + how to locate dialog window on the top of the screen

Is it possible to use the tput command in order to place the dialog window on the top of the screen ? For example The following dialog command display the log is running by tail command dialog ...
2
votes
2answers
45 views

Output piped content to file and show number of lines in the file on stdout

I would like to use tee to pipe content from stdout and stderr respectively into files (in fact append it with > >(tee -a $filename)). However, instead of seeing the contents appended to the ...
10
votes
2answers
309 views

Having a problem with a shell script counting characters

I'm trying to learn the basics and I have run into an issue with my script counting the characters of a user's input. Here is my script, can someone point out where I'm going wrong please? ...
2
votes
3answers
134 views

Copy files by date/time order contained within filename?

I have a bunch of files with a pattern like this: {UID}-YYMMDD-HHMMSSMM-NEW.xml Or a real example: 56959-140918-12465122-NEW.XML I want to copy these files to another directory in date and time ...
4
votes
5answers
660 views

Clone directory tree structure and copy files to the corresponding directories modified after a specific date

I have a folder with more than 30 sub directories and I want to get the list of the files which was modified after a specified date(say sep 8 which is the real case) and to be copied with the same ...
0
votes
0answers
64 views

bash + timer in dialog window

is it possible to insert the following code ( timer ) in the dialog progress bar ? date1=`date +%s`; while true; do echo -ne "$(date -u --date @$((`date +%s` - $date1)) +%H:%M:%S)\r"; done ...
-1
votes
3answers
161 views

How can I select columns based on a control file with invalid column numbers?

I have to generate the file dynamically from the source file based on the below control file. control_file.txt 1,3,5,-1,8,-1,4 The control file contains the position of columns which I require ...
1
vote
2answers
117 views

How to grab output from command in shell script [duplicate]

I'm trying to write a shell script in RHEL which will execute grub-md5-crypt and the user will type their password. Now the problem is how can I grab the encrypted md5 hash displayed to the user in ...
1
vote
1answer
53 views

File not found (cygwin on Windows)

Windows 7 TeX Live 2014 I am trying to install Minion Pro and Myriad Pro for the use with pdflatex. When I try to run the script in cygwin via name@pc-name /cygdrive/d/LaTeX/FontPro-master-Build01 ...
1
vote
1answer
68 views

Solaris 10 : command to copy text to the clipboard. (command line)

I'm searching a command to copy text to the clipboard. xclip and xsel are commands which are available on several Linux and Unix OS-es, but is unfortenuately not available on solaris 10. ...
2
votes
2answers
126 views

How to make my bash script be able to create an log file for a clamscan running in cron?

I've created an custom clamscan(clamav) in bash and when I run it in my shell everyhing is fine, but if I run it in a cron, it can't create the log file. This are the errors: ...
-2
votes
1answer
127 views

Shell Script to copy the file to another folder

I am new to Linux, I have to write .sh file which will be called from .Net Application. Script.sh has to move the file from rootdirectory to a specified folder. I am expecting to pass SourceFilePath ...
2
votes
2answers
152 views

Shell script throws a not found error when run from a sh file. But if entered manually the commands work

Im trying to use the following script to generate a sitemap for my website. When I run it as sh thsitemap.sh I get an error like this and creates an empty sitemap.xml file : thsitemap.sh: 22: ...
5
votes
4answers
306 views

How to rename to fixed length

I have files named as 0-n.jpg for n from 1 to 500, for example. The problem is that some guy using Windows didn't use leading zeros so when I do ls I obtain 0-100.jpg 0-101.jpg ... 0-10.jpg ... ...
1
vote
2answers
40 views

Bash to Fish Conversion: Display custom message when CD'ing into a specific directory

Basically, I'd like to create a file .cd-reminder with an announcement/message inside a specific directory. It will be displayed every time someone 'cd' into that specific directory. There is a shell ...
1
vote
1answer
80 views

Use saved input for scripts

I have a few scripts that I constantly enter in input as below: [support@ccfcore-3 exporttool]$ ./sendExamToRepo.sh Enter the Study Instance UID: 2.25.98472613238667427310842065102689842379 The ...
0
votes
1answer
38 views

How to set the environmental variable for my scripts same as the users shell? [closed]

I want to know how to set the environmental variable for my scripts that I have written such that they are the same as the user. This way I can save time in giving an absolute path of the command.
0
votes
1answer
61 views

Init script to run a script as specific user

/apps/data/service/bin/startup.sh This is the script i want to be executed during RHEL booting. I want it to be run in runlevel 3 only. And i want this script to be started as specific user, ...
1
vote
0answers
46 views

Setting XDG_DATA_HOME and XDG_CONFIG_HOME on compile/per program

The goal is to have a -dev version and a stable repository-based version installed at the same time, but with different data and config directories so that the dev version is not operating on(and ...
2
votes
1answer
45 views

get the name of new directory that created out of tar command

How can I get the name of new directories that were crated out of tar -xvf command? For ex. When I run the command tar -xvf jdk-7u17-linux-x64.tar.gz the contents of this tar extracted in a new ...
1
vote
1answer
96 views

How to send a mail when someone remote connects to my server

I would like my server to send a mail to me when someone connects remotely over ssh to my server. who only gives me back the Username, TerminalID and Date. I cannot use only that, I need to check ...
0
votes
0answers
25 views

Shell Script for tracking number of times each command executes

How to have a shell script that takes input from /var/log/sudo.log and sends results to a spreadsheet that displays graph for each command execution? I want to record how many times each command ...
1
vote
1answer
155 views

dialog menu to display files and select one of them

I want to display all the files under /home directory in menu, and select only one of them. Then the script will print the full path of the selected file. I have created the following script. This ...