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

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2
votes
3answers
121 views

How to create a loop in bash script

I wrote the following script. It is invoked by udev. When I plug my external USB hard drive the script checks if the volume is mounted by truecrypt, if it is not, it mounts it; if it is mounted it ...
4
votes
3answers
123 views

Bash: Zipping/grouping files by common substring

I have about 100 files. They are named like this. 3000_ABCD_XXXXXXX.csv 3000_ABCD_YYYYYYY.csv 3000_ABCD_XYXYZYZ.csv 3000_EFGH_XXXXXXX.csv 3000_EFGH_YYYYYYY.csv 3000_EFGH_XYXYZYZ.csv ...
0
votes
1answer
33 views

How to turn verbose mode on and off using a case statement in UNIX

I'm trying to create a shell script file that uses getopts. The purpose of the program is to remove files that are in the project and place them in the deleted directory aka recycling bin. I have ...
2
votes
4answers
39 views

Generate multiple symbolic links with maitaining directory structure

I want to generate symbolic links from multiple folders with maintaining the directory structure. I read a few answers and the best thing i can come up with now is: find ...
1
vote
2answers
59 views

Copying latest files from the remote servers

We run report on multiple remote servers which we pick up monthly on our central server. The whole process is automated with scp and working well. The issue is that sometimes we go on individual ...
3
votes
2answers
72 views

Checking the status of custom services with a script

I have a handful of shell scripts that start WebLogic managed servers. I need to design a master script that does the following: Executes the shell script for a component\managed server Checks to ...
3
votes
5answers
112 views

Get values block by block in same file

I have a file say "SAMPLE.txt" with following content, P1 10,9:6/123456 P2 blah blah P1 10,9:5/98765 P2 blah blah P1 blah blah P2 I want a output file say "RESULT.txt" as, Value1:123456 ...
0
votes
1answer
51 views

Search a string between two timestamps starting from bottom of file

I was trying to find a string Cannot proceed: the cube has no data in huge test.txt file only between timestamps yesterday 22:30 pm to today 00:30 am. Script: tac test.txt | awk -v today=$(date ...
0
votes
1answer
37 views

Scripting error after bc command

I am trying to execute script contains the following: #!/bin/bash USED=`free -m | more | grep -v total | head -1 | cut -d':' -f2 | cut -d' ' -f18` CACHE=`free -m | more | grep -v Swap | tail -1 | cut ...
0
votes
0answers
24 views

shell script for executing mux verilog code

I have a verilog file mux.v and testbench muxTB.v. used ifdef caeses for behavioural model ifdef struct for structural model I have executed these files using the commands iverilog mux.v muxTB.v -D ...
0
votes
0answers
38 views

Specific Jar file doesn't run on startup

I want to run a jar at startup, so I asked a question here. I was given a few suggestions, so I started from trying to create a script file and desktop file. I created a script file and desktop file ...
1
vote
3answers
237 views

compare two columns of different files and print if it matches

I am using solaris 10 and Grep options involving -f doesnt work . I have two pipe separated files: file1: abc|123|BNY|apple| cab|234|cyx|orange| def|kumar|pki|bird| file 2 : abc|123| ...
0
votes
1answer
13 views

Renaming file in scripts [closed]

I want to rename IGNORE_NAMES_20140606-2014-06-06.txt file to IGNORE_NAMES_20140606.txt. I don't want to use the command below as I want to do it through a shell script. cp -p ...
0
votes
1answer
41 views

How to output the lines of a file after find and a grep?

Hello I want to output ERROR messages from logfiles from the current date. First I search for the logs of today with specific prefix: find /home/USER/logfilesError/ -maxdepth 1 -type f -name "xy_*" ...
0
votes
2answers
34 views

How can I search filenames which are starting with xy_* and are created/edited today?

Hello I´m currently trying to search for logfiles which are starting with xy_Number and are created/edited today(not last 24 hrs). I tried: find /home/USER/logfilesError/ -maxdepth 1 -type f ...
1
vote
1answer
57 views

Send copy of a script's output to a file

Say I have a Zsh script and that I would like to let it print output to STDOUT, but also copy (dump) its output to a file in disk. Moreover, the script starts with the following option set -o xtrace ...
2
votes
2answers
66 views

What is the best tool for automating the building 32-64bit libraries for Unix & Windows building C++ software, replicable by users and machines?

Is there a system or product that can be used in automating the process of building 32bit and 64bit libraries for multiple platforms (Solaris (Sparc & x86), and windows) used in building C++ based ...
1
vote
2answers
42 views

nested case - why must “;;” be put after possible commands and not directly behind “esac”?

I would like an explanation about the termination ;; in a nested case statement. Is it documented somewhere ? Why doesn't it work like this: #!/bin/ksh ... esac ;; ...
2
votes
4answers
137 views

Copy files and directory tree for filesize in specified range

Hi I would like to make a small script copying files from different directories example /pp/01 /pp/02/ etc... to another destination with the same directory design. But only those files within the ...
1
vote
1answer
266 views

-ksh: revenue_ext.ksh: not found [No such file or directory]

I am getting the same not found [No such file or directory] error when trying to execute a ksh script. Read tips about the PATH and running the script with a ./ in the posts here and here and tried ...
5
votes
2answers
94 views

How would I add a prefix to input I receive from a pipe via awk and color the prefix conditionally?

Is there a way to add a prefix to lines received (and filtered) via awk - yes I know that's possible so far - and then conditionally (e.g. based on the existence of the $PS1 variable of the ...
3
votes
5answers
119 views

Look if a folder has some files of certain extention

Lets say I have a file structure: $ cd /home/Desktop $ ls -d */ Abc/ Qwe/ Zxc/ Rty/ $ Now I want to iterate through every directory and look if they have any .pdf files. Could some one please ...
2
votes
2answers
121 views

How to get previous year and previous month in solaris 8

How to get previous year and previous month in solaris 8? I have tried below command but none of them is correct: date +'%m' -d 'last month' date +'%Y' -d 'last year'
1
vote
3answers
76 views

operator in if condition

I am using the below script to move two days back when script runs at starting two days of the year and also check first and second days of every month and move two days back. if [$month="01"] ...
1
vote
1answer
41 views

case multi-pattern with strings

If a put "TITI" or "TETE" on V3 it doesn't work but "TOTO" will work. It's like it takes into account only the first possibility..."TOTO". #! /bin/ksh - V1=CRITICAL V2=HARD ...
1
vote
1answer
36 views

Does the command execute automatically when setting it to a variable?

I'm getting familiar with all about linux & shell/bash scrpiting. I'm configuring a backup script & it will compress an entire dir. I wanna know if I have to print the variable where the ...
1
vote
2answers
76 views

can you only input the password once and then execute the su command without entering a password? [duplicate]

I am copying files from a remote server to my local server. Here is the code that does this: sshpass -p "password" ssh -q username@$192.168.162.156 "mkdir -p /temp ; ...
1
vote
1answer
50 views

Using kornshell or Perl to circumvent permissions needed by root

I have a problem where I need to change the ownership and permissions of one file that exists on more than 200 servers. I belong to 2 different groups and need to change the ownership from one group ...
0
votes
3answers
201 views

compare two files based on a column and print it

I have two big files of 400,000 lines. I want to compare the column 1 of the second file with column 1 of first file recursively. If they match I would like to print the whole line. It is a sorted ...
1
vote
2answers
61 views

Shell script to Capture the file name and size in csv file and add header on that file

I have a number of zip files in a certain folder. I want to capture file name and the size of the files in a CSV format in day wise and put it in crontab so I can report on a daily basis, and then ...
2
votes
2answers
149 views

Any way in Bash to write to a file every X seconds without closing it?

The hardware watchdog on my system needs a 0 written to /dev/watchdog at less than 60 seconds interval or it will fire. The file handle must be kept open however or the watchdog is then disabled. ...
5
votes
2answers
124 views

How exactly does `if $cmd ; then $cmd ; fi` differ from `$cmd && $cmd`?

In an answer to another very good question I made the following assertion: According to my reading of the POSIX specs, the use of one or the other makes no difference from a parsing standpoint. ...
8
votes
4answers
799 views

Bash syntax error when “else” follows an empty “then” clause

Why would following script not execute, but give a syntax error of else: LOGS3_DIR=~/logs if [ -d "$LOGS3_DIR" ]; then cd cd "$LOGS3_DIR" echo "$LOGS3_DIR" for filename in `find "." -mtime 1 ...
1
vote
1answer
21 views

Sourcing scripts with a for loop for different variables

I have several shell scripts that I summarised within a global script. I am using some variables that are the same across all scripts, and I wrote a separate script for this, which I am sourcing in ...
3
votes
1answer
35 views

Redistributable completion for my bash scripts

Is there a simple way to embed the completion features inside a script, for bash ? I have a script that I want to redistribute, but I can't ask the people to add something inside their ...
3
votes
2answers
199 views

Read all files in folder and subfolders - progress and size

Command I have is: time find . -type f -print -exec cp {} /dev/null \; This command finds all files in current folder and subfolders, print the name of each file and copy each of them to /dev/null. ...
-1
votes
1answer
42 views

Cron spamming because of renice [closed]

I have a bash script that I execute using cron. The script begins like this: #! /bin/bash DIR=/home/pi/bin/run renice 19 -p $$ ionice -c 3 -p $$ : Now, every time cron runs this script it sends ...
0
votes
1answer
58 views

Writing a shell script in Ubuntu to process several layers as a single animated GIF file [duplicate]

I am an Ubuntu 12.04.4 LTS 32-bit user and I would like to automate the process of opening several PNG images as layers then saving these layers as a single animated GIF file in the GUI of GIMP. My ...
4
votes
2answers
89 views

Remove specific file from directory if it's the only one

I have a lot of directories and sub-directories. I want to recursively remove one specific file from a directory if it's the only one there. Also assume that there are no sub-directories in that ...
1
vote
1answer
125 views

Shell script and crontab to capture file size, name and date in a CSV file and then send via email?

I have a number of zip files in a certain folder. I want to capture file name and the size of the files in a CSV format in day wise and put it in crontab so I can report on a daily basis, and then ...
3
votes
2answers
48 views

Have ssh-add be quiet if key already there

I want to put ssh-add /path/to/special_key at the top of a script. This works fine, but it always prompts for the passphrase. This is strange, and a little annoying, as it still asks for the ...
1
vote
4answers
117 views

Add/delete workstation ip to /etc/sysconfig/iptables and then run service iptables reload

I need a script to add a users workstation ip to /etc/sysconfig/iptables and then run a service iptables reload. I need the same type of script for removing this rule from iptables. I found the ...
1
vote
1answer
56 views

Copy the file created newly in UNIX [closed]

I have a directory where so many files created daily and need to copy the new files which were generated. And all files will be created with starting name abc_ Ex:I have a file abc_0520123.pdf on ...
2
votes
1answer
57 views

Sharing variables across multiple shell scripts

I am trying to summarize multiple shell scripts within one large shell script, such as this: #!/bin/sh bash script1.sh bash script2.sh bash script3.sh All scripts share the same variables "var" and ...
0
votes
1answer
226 views

two .csv files compare using awk

I need to compare two files, File1.csv and File2.csv (Separated by ',') using Awk Logic: Column PID in both files are reference. If for same 'PID' in 'File1.csv' and 'File2.csv' and in both files ...
2
votes
3answers
157 views

How do I drop root privileges in shell scripts?

The "--up" option in OpenVPN is normally used for routing etc. And so it is processed before OpenVPN drops root privileges to run as nobody. However, I am invoking shell scripts that need to run as an ...
0
votes
2answers
62 views

Simple Script to setenv tcsh or export bash

I am having problems with simple scripting, my Box is CentOS so bash is the default shell, now I wanted to send a line via setenv (tcsh) and would like to make a script that will ask me to input a ...
3
votes
4answers
281 views

how can we use awk to get multiple words after a significant word?

I want to connect to my DB only once to do multiple SELECT queries as follows: #!/bin/bash #Begin Code query=$(echo "SELECT COUNT(*) from USER_IPTable; SELECT User from USER_IPTable; ...
1
vote
1answer
133 views

Switch users with sudo or su in a shell script

I inherited this. Long story short I have an XML file that is calling a shell to run some commands. Everything I have tried has failed at the second su in the script. Here are some of the failure ...
2
votes
3answers
104 views

grep on a Java Method

Lets say I have a java class called DirectAction some of the methods in the class have the word "action" or "Action" What is the grep command to get the names of all the methods who have "Action" or ...