A script is a sequence of commands or instructions that are executed by an interpreter program rather than compiled into a standalone executable program.

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Formating VGA info to conky

I'm trying get conky working on my system, and I'm stuck on how to format an specific shell variable to display my VGA. From shell I get my VGA using: lspci | grep VGA The output: 01:00.0 VGA ...
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votes
1answer
23 views

Bash exit from subcommand [duplicate]

I have a script with the following code: command_that_could_fail || (echo "command failed"; exit 1) However, the exit seems to just be exiting from the sub-command formed by the second part of the ...
0
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2answers
60 views

Bash script arguments not being passed to function? [closed]

I'm trying to pass the arguments when invoking a bash script to a function defined in that script. In my head this is trivial but in practice seems more difficult. Script is: #!/bin/bash function ...
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3answers
2k views

Configure localtime. dpkg-reconfigure tzdata

I'm using this to configure localtime: dpkg-reconfigure tzdata It is ncurses interface. I'm looking for the way to programming this. Is there true way without user ncurses interface? How to ...
1
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0answers
46 views

Systemd script not echoing

I've recently setup Fedora 22 onto a machine and it's using the systemd filesystem. I've been reading up on it and now I need to create a systemd start up script for postgresql For testing I created ...
2
votes
1answer
45 views

make sure all lines in a textfiles don't have the same value

I have a text file that contain multiple lines. Some of the lines have contain same value. What I want is to make sure that all of the lines do not have duplicates or "triplicates". Sample: ...
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vote
2answers
53 views

How can I make flashing text in bash?

In the script bellow, how can I make the the word "end" from the output of the command " printf "\e[41mend==>\e[m $i "", flashing? #!/bin/bash in=path_to_my_folder for i in $(cat ${in}/file.txt); ...
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votes
2answers
247 views

Converting and rescaling a lot of png images to jpeg

I have a lot of .png images in a folder. Is there a command (or software) that can convert all them to .jpg and (simultaneously) rescale the created .jpg files to 25% of their original size?
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2answers
95 views

How to find out last run time of shell script?

I am trying to find out at what time the shell script ran last time within the shell script. I tried: ls -laru ls -lart but all these commands give me the last modified time and last accessed ...
4
votes
1answer
48 views

Where to save temporary files for shell scripts

I have a script to toggle my screen backlight (mapped to a keyboard shortcut), and I want to save the brightness level so I can restore it when pressing the keyboard shortcut again. Is there a ...
0
votes
1answer
34 views

Systemd postgresql start script

I'm in the process of installing postgresql onto a second server Previously I installed postgresql and then used the supplied script ./contrib/start-scripts/linux Placed into the correct dir # cp ...
5
votes
3answers
2k views

Maintain (or restore) file permissions when replacing file

I have a command that accepts a file as an argument, modifies the file, then writes it to the file name specified in the second argument. I'll call that program modifyfile. I wanted it to work "in ...
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votes
5answers
563 views

How to add a password to a BASH script

I want to create a script to run the following BASH command: mysqldump -u [username] -p [db_name] > [path to backup file] Which results in a backup file. When running this in BASH, it prompts ...
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0answers
26 views

Start a process from (noninteractive) shell script (cgi) and keep it running when script ends

I want a cgi script to start a process which stays alive after the cgi script exits. I tried: #!/bin/bash nohup process-to-keep-running & That works fine, if I run the script from an ...
2
votes
1answer
76 views

How to create gcov files for a project in a different dir?

I want to analyze code coverage datas. I want to create gcov files from OpenSSL (and from other projects), but I can only create them in the same directory of the project, and only for the files in ...
0
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0answers
19 views

IPC or command line? [migrated]

I'm creating a nodejs program that need to use some unix command. I have two choices either execute them using exec('command ...') which just execute the command with the given arguments. Or through ...
4
votes
2answers
71 views

Stop writing to a capture file after it reaches a specific size

I'd like to monitor my network traffic of an specific interface to file. Then I would like to stop the interface if the traffic counts over 60mb total. Is there a possible way to do that?
1
vote
1answer
24 views

LXDE hotkey to start app or switch to it if already running

I got used to Win+(1..9) hotkeys in windows 7+, and would like to implement something like this in LXDE. So, I need to define a hotkey that will: launch defined application if it is not launched ...
2
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0answers
19 views

How to dynamically control the audio volume based on current decibels

Since the Internet videos have different sound volume levels I am wondering is there a way to dynamically decrease the audio volume if it's above certain decibels to a normal value. Could someone ...
3
votes
1answer
39 views

How to programatically control X11 forwarded apps?

I'd like to set-up X11 Forwarding to run remote X applications on the server and X11 client can handle the UX interaction. However I would like to configure the X11 client or fake it to actual do the ...
5
votes
3answers
666 views

How can I script the creation of a single partition that uses the entire device?

I am specifically using this to partition and mount EBS volumes on Amazon EC2 instances, but really this should be generally applicable to initializing any new drive. As the question says I want to ...
0
votes
1answer
46 views

How to copy files to the timestamp generated directory?

Hello I am trying to copy all files from Documents directory to the backup directory that has a timestamp. So I have created a directory called bk$( the time stamp of the directory) and I am trying to ...
2
votes
1answer
39 views

Dynamic Variable in KornShell Script

This KornShell Script (ksh): envir=Dev eval "${envir}foo=bar" echo "$Devfoo" Output: bar But I will not know what value is assigned to envir variable. So I want to do something like this where ...
11
votes
4answers
11k views

Invert boolean variable

I want to try simple script flag=false while !$flag do read x if [ "$x" -eq "true" ] then flag=true fi echo "${x} : ${flag}" done But when I run it, if I type true, I will see ...
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vote
1answer
149 views

Startup script with LSB headers not working correctly (dependency problem)?

I am creating a startup script for my Ubuntu 14.04.1 LTS server. The script need to be run after the Rabbit MQ server. The Rabbit MQ startup script says it provides "rabbitmq-server". So I put this ...
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0answers
98 views

Bash, find and delete old files

Write script for backup files and delete old: #!/bin/sh BACKUPDIR=/var/backups/files ROTATE=1 mkdir -p $BACKUPDIR CURRENT="$BACKUPDIR/`date +%Y-%m-%d`-files.tar.gz" cd /var/ && tar czf ...
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votes
7answers
2k views

How can I make a script to count up by fives?

I was trying to make a very simple bash script to list all of the multiples of five between 375 and 3500 (375, 380, 385...). One thing that I tried and didn't work is: for i in {375..3500} do ...
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1answer
74 views

Can I execute a script before every login

I am planning to have a program that will need to connect to a server. I'd like to be able to send a encrypted password to my server. The thing is, I need my decrypting script to be executed ...
2
votes
1answer
33 views

How to create a zip of directories -mtime -150

I want to zip the directories, sub directories, files in main and sub directories from today till 150 days ago. I only consider the date of the directories where I am running the command, no matter ...
2
votes
2answers
49 views

Delete Entries in File if the Same Entry Exists in a Master File

I have a JSON master config file whose value may be overwritten by a specific account's config file (also in JSON). The Master file has this structure: { "section1Configs": { "setting01": ...
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votes
2answers
48 views

Find file, Edit text within files

Im trying to find a file then edit the text within these files. This is what I have so far, but sadly Im not that well versed... Help Please? grep -rl "wrongtext" ~/Library/Calendars ...
2
votes
2answers
155 views

Merge two-columns files into one file

I have a bunch of files (file1, file2,file3, ...) with two columns. For example, file1 looks like: 0.12 0 0.32 0 0.42 1 0.23 0 and file2 looks like: 0.34 1 0.55 1 0.31 1 0.99 0 I wonder how to ...
3
votes
4answers
407 views

Add path to $PATH if not already in $PATH [duplicate]

I need to add a path in a bash script, but it may be executed several times: export PATH=${OPENSHIFT_HOMEDIR}/app-root/runtime/bin/:${PATH} I don't want that path to be added over and over. How can ...
3
votes
1answer
130 views

how to compare a decimal value with a integer in shell scripting? [duplicate]

Could anyone please help me for comparing a decimal value with a integer in shell scripting? Example: i=1 j=1.2 if [$j -gt $i];then echo "growth" else echo "None of the condition met" fi Im ...
0
votes
1answer
49 views

Problem with inotify-wait as daemon

I have been running inotify-wait on my ftp server in byobu to monitor a folder, move data, and send email notifications for a few months without problems. Since I started this I have added 3 more ...
0
votes
1answer
101 views

How to execute shell commands in a loop from within a bash script?

I am new to bash and need help badly. I want to write a script which will run on my android phone & perform the following things: echo "1" > /sys/kernel/mm/ksm/run wait for 2 minutes: then ...
1
vote
2answers
101 views

How do I scp a file from server A to server B from cron?

I have a file in server A which I am able to do transfer to server B using scp. I need to do this through a cron entry. server B has a password. How do I perform this?
3
votes
4answers
869 views

Print a string including single quotes and other special characters

How can I write this with an AIX script correctly? My requirement is to write this command in test.txt: clock=$(prtconf -s | awk '{print $4,$5}') I tried this command: print 'clock=$(prtconf -s | ...
1
vote
2answers
38 views

Else not Executing

In my script, I transform data to a more readable format. But I am having an issue. If no arguments are typed, just the script, I want it to come back "Please enter a filename" which I have done. But ...
4
votes
2answers
597 views

How can I copy all users .bash_history files into my home directory?

I am running as root. I want to copy all the users on the system's .bash_history files into my home directory. I can do this to combine all of them into one, but then I can't tell who's commands are ...
0
votes
1answer
54 views

How to calculate Swap warning/critical dynamically through script?

I have used SAR in my below script and is trying to run on individual servers for my nagios monitoring. Can someone please suggest how i can get the swap warning and swap critical values in my check ...
0
votes
4answers
62 views

Copying Only Directories With Files

I am trying to copy files and the directory it is in to another location. I can find the path like this: find ~/dim_import/* -type f ! -name xdir | cut -d '/' -f 5-10 which outputs ...
0
votes
2answers
815 views

Why is my shell script hanging on `apt-get -y upgrade`?

Ubuntu : sudo DEBIAN_FRONTEND=noninteractive apt-get -y update sudo DEBIAN_FRONTEND=noninteractive apt-get -y upgrade sudo reboot Script is always interrupted after upgrade and then it will stay on ...
1
vote
0answers
29 views

Can't get bare-bone simple bash function to work [closed]

I have some tmux scripts in a directory, and I'm trying to make a script to make it easier to call them. Function is below tms() { ~/linux/scripts/tmux-scripts/$1 } This is in my bashrc, I then ...
4
votes
3answers
177 views

Bash script: do something one time inside a loop then stop, but continue looping

I have a Bash script that checks my laptop battery and sends me an Android notification (via shuttle, a Bash script I wrote that serves as a cli interface for the Pushbullet API). It works nicely, but ...
0
votes
2answers
45 views

Cannot login after making a service autorun at startup [Debian]

On a normal startup after booting the login prompt appears from where I would login. But after making motion autostart I am unable to login or open GUI because motion is using the command line to ...
0
votes
1answer
36 views

Auto Download & Untar Script

Looking to write a script for my Linux Server so look for a specific folder name, then wget a file, and untar. Where would I start with this? I know that it has to be written in bash, but I'm very ...
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votes
2answers
66 views

Shell append string after last match

I would like to insert a string after the last match, example: String to insert after last instance of banana: Orange Input Apple Banana Apple Banana Output Apple Banana Apple Banana Orange I ...
-1
votes
1answer
44 views

Whats wrong with the 2nd script?

I am new to linux and scripting. I have some concerns regarding the script below which creates folder per line from file. Folder.list is located in /scripts/ . 1st script works smoothly but the 2nd ...
2
votes
2answers
550 views

Script that unpacks a initrd, allows editing of the preseed.cfg and the packs it to cpio and gzip again

I want to program a script that allows what is said in the title. So basically I gunzip the initrd, than unpack the cpio, open vi to allow editing, save, pack with cpio, and gzip again, so nothing ...