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

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Using chown $USER:$USER inside bash script

In a small bash script I'm running I am attempting to chown a new directory that is created. I've added: sudo chown $USER:$USER /var/www/$sitename sudo chmod 775 /var/www/$sitename after the line ...
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0answers
17 views

ftp files share folder need email notications when customer upload and unload files

We are hosting ftp file share folder, is there a terminal script to send email notifications to different people (email Address) when they download or upload on a certain folder, Were running mac mini ...
10
votes
3answers
794 views

What does `1>>` and `2>>` mean in a bash script?

I have the following bash script, from what I understand >> is used to append the output of a command to an existing file instead of overwrite, but what is it doing in this case? This script is ...
1
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3answers
131 views

Shell script to delete multiple files

So, I have a file which contains a list of hundreds of files that need to be deleted from various directories. I figured the easiest method would be to create a batch file but I'm not having great ...
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2answers
43 views

Rename file by it is folder name

I have a sort of folders (A,B,C,D,E,F,G,H) and I have one file in every folder has the same name in all the folders (file.txt) but the size of this file is different from folder to folder. I wanted to ...
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1answer
53 views

Ambigous redirect done >$2

I have finished my bash script but I am still getting two errors. I've also searched for related issues but none worked: #!/bin/bash avem_element () { local e for e in "${@:2}"; do [[ "$e" == ...
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0answers
26 views

Bash script results in errors like “: command not found”. Using Sublime Text to edit the file in Windows [duplicate]

I had a ~/.bash_profile which I wanted to move to somewhere where it'll be executed for all users, including the root. I was led to /etc/profile which worked great. I appended my script there and it ...
1
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0answers
29 views

In bash instead of creating new line changing the already made line [duplicate]

Ok hard to explain in few words so I was wondering how instead of creating a new line......like lets say I want to: while true; do echo "hello"; sleep 1; done then I want it to count the number of ...
3
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6answers
112 views

redirect output to specific line number

I want to grep certain lines by keyword and redirect the output to specific line number of an existing file. Command grep "key" temp_file >> desired.txt What I need is that I can append the ...
3
votes
5answers
903 views

Lots of elif, is there a better way?

I have a Bash script that looks like #!/bin/bash # FECHA=`date +%j` if [ $FECHA -eq 40 ] then echo "Esta semana le toca preparar el café a Osvaldo" | mail -s 'Café' mailgroup@somedomain.mx ...
1
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3answers
67 views

Cronjob doesn't execute shell script, but when I am executing it standalone it works. Why?

Shell Type: >echo $SHELL /bin/ksh Cronjob : 15 * * * * /bin/ksh /wls_domains/resMGT/logs/bea/wlr3queuetransaction.sh > /wls_domains/resMGT/logs/bea/data/script.log The script is as below: ...
4
votes
4answers
165 views

list folders and their content

I'd need a file reporting for each folder the content and the name of the folder itself. If I do ls -l * I have (this is just a subset of hundreds of folders) ...
0
votes
1answer
46 views

How to capture return code (not exit code)

I have a script that execute some process and return a number based on the job status. This script is triggered on the back background. i.e. ksh -x myscript.sh 20150102 & My question is how ...
0
votes
1answer
79 views

“too many arguments in [ (test) statement”

this is my first "if-else" script on linux. It gives the error [: too many arguments Code: n=0 if [ $n % 2 -eq 0 ] then echo "even number" fi How to correct it.
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2answers
77 views

print IP address with interface name

I want to show the IP address like below lo : 127.0.0.1 eth0 : 192.168.5.123 eth1 : 192.172.0.212 wlan0 : 10.1.0.124 I'm able to print all IP address by ifconfig | awk '/inet addr/{print ...
4
votes
1answer
69 views

Unix: Problem with cmp command

Let me give you an idea of what I am doing. I am running a script that is doing basic OS processes for two systems Linux and SunOS. Well the first directory it runs is called sol0. The script puts ...
0
votes
1answer
32 views

v4l2-ctl error in script

I can use v4l2-ctl in command line like these: v4l2-ctl -d /dev/video1 -c focus_auto=0 v4l2-ctl -d /dev/video1 -c exposure_auto=0 But it has error when I run them as a script in a file. for example ...
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2answers
79 views

Creating a shebang pointing portably to an interpreter in the folder of a script

I have a JS file (file.js) that I want to have executed as a command line shell script through nodejs (iojs actually); I'm using MINGW Git Bash on Windows. The standard way to do it is to put the ...
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votes
6answers
63 views

Find all numbers not in a range

I have a file with following content :- 2 4 5 and have range, say 1 to 5 . I need a shell script whose output will be 1,3. That is the numbers which are not present in the file and within the ...
2
votes
1answer
37 views

Intercept and modify commands in bash scripts

I have some scripts and some commands in the scripts are like this ./executable arg1 arg2 .. argn I want to change the above command to LD_PRELOAD=/some/lib ./executable my_arg1 my_argn arg1 arg2 ...
3
votes
2answers
68 views

Execute command after inotifywait established watches

Inside shell script (test.sh) I have inotifywait monitoring recursively some direcotry - "somedir": #!/bin/sh inotifywait -r -m -e close_write "somedir" | while read f; do echo "$f hi"; done When I ...
0
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1answer
43 views

Crontabbed shell script not able to create/write to a file

I have written a simple shell script to backup the tables in my DB using the mysqldump command. The command simply dumps the DB into a dbName.sql file. However, if the dbName.sql file doesn't already ...
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vote
2answers
48 views

add a new line to a delimited file

So I have a file name test.txt inside that file I have about 20 lines of text that are delimited by pipe | Example: John|freshman|seatle|math|4|fulltime Bob|senior|Tacoma|biology|4|part-time I ...
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0answers
25 views

helping get a shell script right from github

I came across this script on github. https://github.com/loganbraga/dotfiles/blob/master/bin/runOrRaise #!/bin/bash if [ $(pgrep $1 | wc -w) -gt 0 ]; then if [ $1 == "iceweasel" ]; then wmctrl ...
1
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0answers
65 views

Questions about whiptail and bash functions

I'm a bash newbie. Say I have this script #!/bin/bash function cpp-lang { yum install "Development Tools" } function updatesys { yum -y update yum -y upgrade } whiptail ...
4
votes
4answers
569 views

How create a temporary file in shell script?

While running a script, I want to create a temporary file in /tmp directory. After execution of that script, that will be cleaned by that script. How to do that in shell script?
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2answers
44 views

Setting up a script on an AMI box to create directories - vsftpd, pam, mysql

I'd like to first say I'm a noob when it comes to linux, so please excuse my confusion. I'm trying to setup vsftpd on a amazon ami 64 bit box, free tier micro. Following these instructions, ...
2
votes
2answers
258 views

How do I use a function return as a condition of an if else then shortcut?

There are instances where a function needs to execute and return to the caller and this works for me. if tst; then echo "success" else echo "failure" fi function tst () { return 0; } ...
1
vote
1answer
50 views

split line based on space and delete the second part

I have a big file >fid|29290408|locus|VBIEntCas2262_0001| Phosphoglycolate phosphatase (EC 3.1.3.18) [Enterococcus casseliflavus EC20] ...
1
vote
2answers
58 views

Copy the first 2 lines from a file and then remove the lines

I need to process a file using a shell script. The file arrives with the data as well as some embedded information releavant to how it is processed. The file is in the following format; ...
0
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1answer
53 views

Error while running script with nohup

I got this error while running my script with nohup sh: syntax error near unexpected token `(' My script is as follow: #!/bin/bash report_log="report.log"; grep -A 3 'successful\|ERROR COUNT ...
-1
votes
1answer
50 views

multiple input in a awk file

Please guide me to get out of it. Thanks in advance. I am having a situation that I have to write a awk script which takes the input of two .out files and generate a single .txt file. $ cat ...
2
votes
1answer
55 views

How do I securely download files in shell scripting?

I am writing some shell scripts to automatically download software packages off my server and set them up on customer servers. At some point within the script, the download command is wget ...
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votes
2answers
36 views

placing things in a users home directory with .deb

i am making a .deb installer and would like to place some files in the users home directory but i can not hard code a username. does any one know of any other places in the file system that i could ...
0
votes
1answer
39 views

finding and replacing text [duplicate]

Does any one know how to find and replace text in a file. it can be implimented into a bash file. i would like to find the line and the output the text to it the file can only be opened with the root ...
0
votes
1answer
33 views

How to automat password entry without user interference?

How to type password automatically without user interference. For example echo 'MyPassword@2014' > su UserName I want to automat this in my script. The script should not wait for input. It ...
3
votes
3answers
90 views

The output I get via “echo” works as a command when pasted to terminal, but not in the script

I'm trying to change the files generated by an app that unfortunately often contain spaces. I have managed to get "echo" to give me output that works if copy pasted into terminal, but when I try to do ...
0
votes
1answer
37 views

Bash script: array elements containing space character [duplicate]

I'm getting started with bash scripting. I'm working with array elements that contain space characters. In the code below, the third array element is "Accessory Engine". I tried to set the space ...
1
vote
1answer
85 views

Why does the printf statement in this loop output the array out of sequence?

When I execute the following code, the output of the printf statement appears to show array out of sequence. In the declare statement the Source item is declared before Destination and in the output ...
0
votes
1answer
37 views

How to assign the cat output of a bash script to a variable in another script

I have a bash script that produces a cat output when it takes an argument. I also have another bash script that executes the first bash script with an an argument that I want to produce cat outputs ...
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votes
2answers
43 views

how to find a file extension with multiple dots [duplicate]

I'd like to extract the extension out of a filename with multiple dots. For instance: gbamidi-v1.0.tar.gz I should get "tar.gz", not "gz" or "0.tar.gz". I prefer a solution not relying on bash ...
1
vote
5answers
381 views

How to use grep and cut in script to obtain website URLs from an HTML file

I am trying to use grep and cut to extract URLs from an HTML file. The links look like: <a href="http://examplewebsite.com/"> Other websites have .net, .gov, but I assume I could make the cut ...
1
vote
1answer
41 views

Save and restore terminal tabs with custom tabs title

I have a Terminal window with a dozen named tabs open *(gnome-terminal) I would like to save the current configuration and have it restored with names and directories. Is there a way to do this? I've ...
0
votes
2answers
42 views

The best way to add Unix Shell variables to CURL GET request

Let’s say I use curl –X GET command with the following link: “$WEBSITE_URL/ACTION_NAME/ACTION1;id=$ID?Command=TEST&id1=$ID1&id2=$ID2&id3=$ID3” As you can see, there are some $variables ...
1
vote
1answer
127 views

Rename files based on directory names

How can I rename .jpg files in multiple folders based on the name of the folder? I also want the .jpg files to remain in their respective folders and not moved. The folder names have no spaces. So, ...
2
votes
1answer
27 views

Is there an alternative to using rbash to restrict a user on my system?

Basically at the moment I am using rbash to stop a user from leaving his directory on my system. The problem with this is, there is a script in my bin which he needs to be able to run from a script in ...
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votes
1answer
47 views

How can I run a script as sudo and for it to not ask me for a password?

I want to run the following script: #!/bin/bash if grep -qs 'MinecraftServer' /media/kiancross/MinecraftServer/MinecraftServer; then echo "Disk already mounted, server boot will continue" else ...
1
vote
1answer
36 views

How can I pass the success (or failiure) of a command to a variable?

I am running rsnapshot to do backups of my NAS. I am forwarding the output of the command (e.g. rsnapshot hourly, rsnapshot daily etc.) to /tmp/rsnapshot_stats_hourly. In another script, I'd like to ...
0
votes
1answer
9 views

How can I pass a function name to a test runner?

I wanted to write my own test runner: do_test () { function_under_test=$1 expected="$2" function_under_test $3 # <-- Line 32 if [ $result -eq $expected ]; then printf '.' else ...
1
vote
3answers
38 views

Loop to check whether a Debian package is installed or not

I like to check whether several packages are installed or not on Debian/Ubuntu Here is my attempt at a script to do this: query=`dpkg-query -W -f '${Status}'` ok="install ok" if ! [ `$query` curl ...