Bash is the Bourne Again SHell, the successor to the classic Unix sh (shell).

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-1
votes
1answer
26 views

Linux - Print specific line from output [on hold]

I am used to working with single line output and can use $1 $4 $8 to specify certain items in that line, but I have never worked with multiple line outputs and would like to just print one line ...
1
vote
2answers
44 views

password check in bash script calling on expect

Background: I have to copy a file from one server, to over 100 servers in a test environment. once the file is copied, it requires to have the permissions on the file changed/verified. These are all ...
0
votes
2answers
39 views

Print last column containing spaces and special characters

I need a full path/command thats been execued to start a process thats exposed on the network - listens on tcp/udp . I did manage to get all of that using below "one liner": netstat -nlp46|tail -n +3 ...
0
votes
1answer
57 views

Nagios bash syntax error

I want to refer with this question to the following post where I got the Skript: Post with Script I'm using Bash 4.1.2(1) and when I try to execute the script, I get following error messages: ...
0
votes
1answer
12 views

Export or Forward /var/spool/mail/USER (readable for customer)

there are some bounce mails in the /var/spool/mail/USER directory that failed to send. Now the customer receives all of those mails from us because he does not have direct access to them. I can ...
2
votes
1answer
1k views

Linux- Permission denied?

I'm installing Neo4j server as a linux service, but when I install it, I get the following message: /sbin/insserv: Permission denied What is this? What should I do? I'm running everything with ...
0
votes
1answer
41 views

why is PATH wrong with cron entry

I have an entry in cron.d: 31 17 * * * root /home/some_user/.bash_profile; /home/some_user/bin/some_script The profile sets a specific path, and I echo the current path in the profile to ensure its ...
1
vote
0answers
47 views

Is rbash secure if user login and ssh passwords are disabled?

I've got a server that I want to use as an SSH gateway for remote and local port forwarding. I don't want arbitrary commands to be able to be executed on it, only my scripts. I keep reading about how ...
0
votes
0answers
13 views

Remap cursor keys in bash vi mode to <nop> (disable cursors) [migrated]

When using vi mode (set -o vi) with Bash, is it possible to remap the cursor keys to so that they don't work (and be forced to use h, j, k and l movement keys)? Under vim (the editor), I can do it ...
1
vote
0answers
20 views

Recover last argument of the last command in bash' vi mode [migrated]

When using bash's vi mode (set -o vi), is it possible to recover the last argument of the last executed command? This is done in emacs mode with ESC + . , and I would like to do it in vi mode as well. ...
2
votes
4answers
385 views

Use logger in shell script

How can I use logger in a shell script? If I run ntpd -qnp pool.ntp.org 2> >(logger) in console, it works as expected. If I put it into a shell script #!/bin/sh ntpd -qnp pool.ntp.org ...
1
vote
1answer
17 views

ssh remote command execution quoting

I found this solution that works for me, but I don't understand how it does work given that the sed command encloses its own parameter in single quotes, and the whole ssh command is also passed in ...
12
votes
4answers
4k views

Run an interactive bash subshell with initial commands without returning to the (“super”) shell immediately

I want to run a bash subshell, (1) run a few commands, (2) and then remain in that subshell to do as I please. I can do each of these individually: Run command using -c flag: $> bash -c "ls; ...
4
votes
2answers
475 views

Faster way to ping URL than curl [closed]

What would be the fastest way to check whether the specified URL is working? (responding in OK http status code)? For now I'm using curl, but I have bunch of URLs to test in a loop, so I'm looking ...
0
votes
0answers
35 views

BASH: bash completion function in a custom script

How I can add existing function to a custom script? complete -F _known_hosts test.sh - this works on the command line however when I tried to add this to my custom script it's not working as ...
13
votes
13answers
29k views

Stop ssh login from printing motd from the client?

I've got SSH passwordless set up, however it prints the MoTD when it logs in. Is there anyway to stop that happening from the client side? I've tried ssh -q but that doesn't work. I don't want to use ...
13
votes
2answers
286 views

How to uninstall newly installed dependencies for a RPM package?

Is there an easy way to make a list of the dependencies a newly installed RPM package will install with yum? Example: If you do yum install ruby then it will also install some rubygems. But when I ...
0
votes
2answers
23 views

Why my netcat connection doesn't send the file correctly?

I wrote this script to send a file using netcat. My intention is to open the netcat port in the destination server from the origin, this way I do everything with just one script instead of having one ...
20
votes
2answers
6k views

Why does redirecting 'script' to /dev/null/ allow 'screen' to work while su'ed as another user?

I was su'ed into a user to run a particular long running script. I wanted to use screen but I got the error message "Cannot open your terminal '/dev/pts/4' - please check." So I Googled around and ...
0
votes
9answers
403 views

What is the easiest way to find out in what file a word is contained?

I've got a number of .conf files in the following "lxadmin" directory and suspect that the text "tanguay.info" is in one of them somewhere. I do this command: cat /etc/httpd/conf/lxadmin/* | grep ...
0
votes
1answer
24 views

convert for loops to while loops comparing arrays

On occasion (like 4 or 5 times in an 8hr shift) I have to check that the sites from being served from a shared server are loading. I currently have a script that does this, however I am using nested ...
0
votes
4answers
272 views

how to run the dialog command with proccess

Please look on my code – ( bash script ) I want to display both dialogs on the screen on the same time, one dialog display the: tail –f from - /var/log/proccess1.log , and the second dialog ...
0
votes
1answer
20 views

Remote bash script execution via ssh causes local script to stop

I have a setup which behaves in a way i cannot get my head around. So I have a local bash script generateTrafficOnHosts.sh which reads IP addresses from a file. It then calls a bash script ...
0
votes
1answer
34 views

Custom Live Boot PXE ISO Script

Currently I am using an open source PC auditing software called Open-Audit to audit PCs my company receives off lease from school districts. The software uses snmap to pull hardware information over a ...
-1
votes
0answers
32 views

How to include single quotes in bash folder expansion? [migrated]

Edited* I have the following definitions in my bash script: DATE_SUFIX=$(date +%F_%H-%M-%S) NAME="MyBackup_" FILE_NAME=$NAME$DATE_SUFIX TMP_DIR="/tmp/" TMP_BKP=$TMP_DIR$NOME_ARQ"/" TAR_CMD="tar czPf ...
1
vote
0answers
55 views

Why do I get different results with the same user and the history command? [migrated]

I work with Linux for quite some time and have seen this behaviour but I never got a good explanation. Probably it's even very simple. If I login twice with the same user (bash) in the same server ...
0
votes
0answers
28 views

VNC/SSH: How to execute a command after logging in? [migrated]

I'm looking for a way to create a VNC console user that executes the command screen or bash immediately after logging in so they get their own restricted shell for executing commands etc. Screen/bash ...
0
votes
3answers
5k views

“Corrupted MAC on input. Packet Corrupt” on file transfer over SSH, SCP, and FTP on Linux Server

help on this would be great. Specs: LAMP server Linux OS - Debian 5.0.1 4x Intel(R) Xeon(TM) CPU 2.80GHz Important Packages: openssl - SSL security iptables - firewall to block all requests ...
101
votes
26answers
31k views

How do I prevent accidental rm -rf /*?

I just ran rm -rf /* accidentally, but I meant rm -rf ./* (notice the star after the slash). alias rm='rm -i' and --preserve-root by default didn't save me, so are there any automatic safeguards for ...
0
votes
2answers
43 views

linux-tomcat - add command to startup.sh

How can I add a command at the end of the tomcat startup.sh script to execute a file. I think it is something like this. Assuming my file needs start as command passed to it below: exec ...
3
votes
4answers
4k views

How can I display the IP address of an interface?

If I want to display the IP address that is assigned to eth1, how can I do this in Bash?
0
votes
0answers
28 views

How to automatically execute a script after saving it? [duplicate]

I'm developing a bash script and, after every save, i have to switch windows and re-run. Is it possible to execute the script automatically every time the file is saved?
0
votes
1answer
1k views

Improper output in SSH session on OSX using FreeSSHd on Windows with cygwin bash/sh shell

I am testing out running an SSH server on a local Windows VM. I have installed FreeSSHd and set the command shell to "c:\cygwin\bin\sh --login -i" (bash as well) with "Use new console engine" ...
3
votes
2answers
7k views

Yum reports updated bash but binary still reports old version

I'm trying to update a CentOS 5 system in order to patch the bash vulnerability described in CVE-2014-6271 / RHSA-2014:1293-1, but am running into an issue. After seemingly-successfully updating bash ...
2
votes
1answer
943 views

Calculate average of every 5 samples with rrdtool or other languages

I want to make an average of 5 samples and calculate a single value: Current output - I put resolution of 5 minutes but receive 5 samples: $ rrdtool fetch file.rrd AVERAGE -r 300 --start 1200000000 ...
0
votes
1answer
939 views

JBoss EAP 6.2 on RHEL 6: ./bin/init.d/jboss-as-standalone.sh hangs while calling via SSH

I'm using jboss-as-standalone.sh to manage JBoss EAP standalone as a service. I can start/stop the service with "service jboss-as-standalone.sh start/stop" while I'm on a terminal. But I would like ...
1
vote
1answer
61 views

What does a minus sign inside of dollar brackets of a shell script mean?

In an existing shell script, I'm seeing some variables referenced that either include or end with a minus sign. For example: PID=${PID-/run/unicorn.pid} and: run_by_init() { ([ "${previous-}" ...
0
votes
0answers
46 views

What is the difference between setting the environment variables in these 2 ways?

For a project I'm working on, we require nginx and lua, and we start it like this: MYVAR1=some_value MYVAR2=some_value /usr/local/openresty/nginx/sbin/nginx -p `pwd`/ -c nginx.conf And everything ...
4
votes
0answers
154 views

Persistent Bash Prompt Prefix Linux [migrated]

I want to have the FQDN as bash prefix instead of just using the hostname. So I can change root@web: ~$ to root@web.domain.tld: ~$ I already know that that is possible by using: ...
0
votes
1answer
54 views

Bash linux increment variable

i am trying to increment a variable name inside a for loop to get 4 dynamic variable in each loop, this is an example while read line do for n in `seq 1 4` do ...
4
votes
2answers
19k views

How to save + close file when editing in bash?

OK - I am linux newbie - I am trying to edit a file from bash via edit <filename> command in whatever the default mode is (I am assuming 'vi'?). Problem is for the hell of me I cannot how to ...
0
votes
1answer
110 views

Nginx how to run shell script on page load via lua module os execute and then serve directory listing?

So I have a bash script that I want to execute/run on each "page load" of url so that it will modify (creating symlinks) to a /public/html/ folder that I want the server to then serve. The problem ...
14
votes
17answers
42k views

Shell Command for Getting IP Address?

Is there a bash command to find the IP address for an Ubuntu box? I need to find the IP address so I can ssh into the machine later.
-2
votes
0answers
28 views

Scripting a menu with selection indicator in bash [migrated]

I'm really new in bash scripting and I'm currently automating my project creation process. I've done a lot of work right now but i'm thinking about changing my installation plugins part... Could ...
-2
votes
0answers
50 views

Syntax Error: unexpected end of file — Bash script [migrated]

I am trying to create an spritz app! Everything was working fine, but since yesterday I keep getting this error: ./spritz: line 176: syntax error: unexpected end of file I have checked the script ...
1
vote
1answer
954 views

Problems in monitoring file age with nagios (command substitution in filename)

In my current nagios installation I check for the existence of a remote backup through NRPE. In particular, my remote nrpe.cfg (on a Ubuntu 8.x) is: ...
2
votes
3answers
547 views

Passing variables problem - Bash

I have a following problem: #!/bin/bash NUM=`cat accounts | wc -l`; for i in {1..$NUM} do account=`awk "NR==$i" accounts`; echo -e "\nAccount: $account\n"; sudo ./backup_maildir $account; ...
75
votes
9answers
106k views

How do I get current Unix time in milliseconds using bash?

How do I get the current Unix time in milliseconds (i.e number of milliseconds since Unix epoch January 1 1970)?
0
votes
2answers
53 views

Can I get an array as an option argument in bash script

I am writing a shell script and wants to pass multiple options in an argument. Is it possible to do that like using getopts? Requirement example: ./shell.sh -d db1 db2 should pass the values db1 ...
0
votes
1answer
126 views

FTP file transfer, loop through a directory and copy old files

I would like to move files older than 30 days and copy them into a remote FTP server. I've already written this script, that is able to connect via FTP. Usually, to move files, I would run this ...