Just using shell scripting, how can I insert text into the middle of a file name. The file has a predictable pattern, let's say 3 letters and 3 numbers and I want to insert text in the middle of those 2 patterns. Say ABC123 is the file name. As a result, the file name should be ABC.blah.123
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I'm just starting out with shell-scripting, but having a problem with making new text files with the touch or cat > commands.
What I've been doing is touch testfile1.txt
Also, I've tried cat > testfile1.txt (text)
Console reports "bash: text1.txt: No such file or directory. Consfusingly, it works fine in the home-directory. But if I move the file to where I want it, I can no longer view, edit, etc. it.
I want to search a file for a particular pattern and if pattern found replace the line with new text. i am using awk 'match($0,"pattern") != 0 {print $0} ' filename to check if the pattern exists.how do i get the line number of the pattern and delete that line and replace the line with my new text?
View 1 Replies View RelatedI want to replace a pattern with other pattern in a textfile. But there are two same patterns,but I need two change only the second occurence. EG:
Text file is
aaaa=1
bbbb=2
cccc=3
dddd=4
[code]....
Now I want to change aaaa=x into some other entry.
I have several (vhdl) files containing a pattern with newline characters that I need to replace by another pattern that also contains newline characters.
I start with something like:
Code:
I want to replace it by something like:
Code:
(I need to paste some lines)
As I need to do this (very) often I want to use a shell script.
I tried:
1.
Code:
result:
Code:
2.
Code:
result:
File remains unchanged
3.
Code:
result:
Code:
4.
Code:
result:
Displays the unchanged testfile
How I can automate the pattern replacement?
Code:
I am working on some homework, however i am not here to be spoon fed. I am trying to get the numerical modification date of each file in a folder. Ie lets say there is a file called bob and it was modified 2006-11-23. i want to get it into a variable as 20061123.
Now i currently have this code:
Code:
However for some reason my output is:
Quote:
See how the 2011 has been placed next to it? i ran it with -x and saw this:
Code:
However i do not know how to find a way around this?
I'm new to the shell scripting. can any one help in creating shell script for matching the content of the specific variable with file. it should remove that line from the file if line is containing same value as variable and keep the other content as it is.i used grep -v for accomplishing the same. But grep will remove the pattern which is similar.For eg. Assume file "test" contain datas :aaffif i used grep -v command for the pattern "a" to this file this will remove content "aa" from the file. I want the pattern only "a" should remove from the file, if it is existing. otherwise it should throw alert content not exists.
View 5 Replies View RelatedUsing sed, I am trying to append four commas ',,,,' at the end of lines containing the pattern 'Response' in a text file with lines such as these:
6,Pulse,50,254968,14886,NA,,,,
7,Picture,8,265157,0,1,15045,2,0,15000
7,Response,1,271553,6396,1
7,Pulse,50,274969,9812,NA,,,,
8,Picture,1,290232,0,1,15045,2,0,15000
8,Pulse,50,294969,4737,NA,,,,
[Code].....
I am trying to create a shell script, on taking a input file as parameter, which need to do 3 things
1) create a copy of existing file.
2) add a new line to the copied file.
3) strip off all the absolute paths inside the copied file
The first 2 points are straight forward. but i am finding it difficult to acheive the 3rd point. myself not very good with awk and sed. but gave it a shot in vain. For example, the input script consists of below,
PROGRAM=`/usr/bin/basename $0`
HOST=`/usr/bin/uname -n`
echo Start $PROGRAM `/usr/bin/date` |
/usr/bin/tee -a $LOG
The output of the script should look like,
PROGRAM=`basename $0`
HOST=`uname -n`
echo Start $PROGRAM `date` |
tee -a $LOG
I have requirement to delete some log files from a directory if a string"deletethisfile" is found.Then restart the application servers.1. Search for the string ?deletethisfile? in server.log file under a directory, If found 2. Stop that particular server.3. Delete the log file 4. Restart the server.
View 2 Replies View Relatedif you execute :
#!/bin/bash
echo "some textstring" >> logfile.txt
then the string "some textstring " will be APPENDED to logfile.txt Is there a redirect way that in stead of appended, the string will be INSERTED at the top of the logfile.txt file ? If this cannot be done by redirecting, what would be the best way to insert the test-string at the top of the logfile ?
delete a file on a remote server using shell scripting.
View 14 Replies View RelatedI'm sure I've done this before and am having a brain fart.
I have run into this a couple of time this last month:
I have a list of torrent files (blahblahhexblah.torrent) saved in a text file. I would like to read the text file and populate the client directory.
I can echo the file using:
But I cannot remember how to pipe the output into the directory, nor can I find any resources that describe the process.
Interestingly enough, I've had a couple of opportunities to do similar tasks with passwords and privileges and even across the LAN in the last few days. Solving this problem will help me solve the others for next time.
I'm gonna replace my machine's ip address and hostname using awk command. the pattern of the file is like the following...ip address="192.168.1.100"the script must ask the ip address from the user and replace it with the ip address in the quotation.
View 14 Replies View RelatedI have such a file(test.txt):
abc 123 456
abc 256 145
axd 125 225
[code]...
I am tying to write a script that asks for user input and saves it to a text file using awk so example #!/bin/bash read a awk #saves to file
I had a working scripted last night, deleted it by mistake and for the life of me can not remember how i did it.
Assume I have a text file as belowabcdaaaaaaagfgkhahahahahahhahhgfThen gf would be returned
View 4 Replies View RelatedI'm writing a script and I have doubts on how to assign values to an already established variable. The value for the vatriable would be coming from a file with three columns. I'm using the awk command for this. Am I doing it correctly? which of the following two ways is the better one or if both are wrong which one should I use?
#!/bin/nsh
inputfile=$1
rolename=$2
[code]....
I've got a text file with a list of .gz files, these .gz files are in various sub directories of one parent directory and I've hacked this little script together to copy them from their current location to a new one and spit out any it can't find to "/home/user/not_found" but for the life of me can't get it to run properly!
The shell script as it currently looks:
Code:
Is there a way to process individual characters one-by-one from a text file in Bash, or is that hoping for a little too much from this lovable old clunker?
View 13 Replies View RelatedI want to cut out part of the 'uptime' output so all it displays is the load average. In the end I want to cut out everything before the word 'load'. I am a total sed newbie and could really use some examples or links. I've googled and haven't found anything useful yet.##edit###I used the 'cut' command- The code was Code:uptime |cut -d, -f 2,3,4,5 |cut 13-
View 5 Replies View RelatedI have to delete a certain line of text from the a textfile via ubuntu's shell scripting.I have done research, and it seems that most people advocate the usage of sed /d option. sed makes does not edit the text file. Hence, most options I discovered involved the use of a temporary variable/textfile and then overwriting the old file with the temporary new file. Is there anyway whereby I can bypass the use of temporary storage containers? I hope there is any magical combination of commands to edit the file directly.
View 3 Replies View RelatedI have two files, uploads.txt and downloads.txt. I would like to combine the columns of these files based on the ip address. How can I best do this?
Uploads.txt Code: 192.168.0.147 1565369
192.168.0.13 1664855
192.168.0.6 1332868 Downloads.txt Code: 192.168.0.147 9838820
[code]...
I want to write expdp output in a text file using a shell script
If i write like below:
It will write whatever is there in log file to text file
But, sometimes export fails with out start taking export (without generating log file) because of job already exists error. such times, we dont know about that error until we check manually... so i wrote like below:
But still it is not writing anything in to text file using above stmt...
Suppose I have a pair of files containing lists. The first file is called contigs.txt and it contains a list that looks like this:
Code:
Contig822
Contig826
[code]...
All i want is to replace some part of pattern.eg:$1=" alok 10"i want to change 10 with any number/string so that result comes as "alok 20". Is itpossible with sed ?I am looking for code some thing related as :echo "alok 10" |sed -ie "s/$1/$1 10/g I know the above is wrong , its just for your reference. Also, while replying kindly explain wherever is required.
View 3 Replies View Relatedhow come I can create a shell script file with two functions, I can execute the file, but when running declare -f, the functions are not on memory, and when invoking the function bash returns invalid. In the other hand, I can copy & paste the two functions at the end of my /etc/bashrc file.... then I can called the function by name.... and the commands within that function run on my session. here is a print of all my bash packets:
[Code]....
Does Fedora has restrictions on shell scripting? I haven't touch bash in seven years, so if things have change on it I'm behind on it, and sorry for my ignorance.
I want to find maximum length file in a given directory. It should search recursivley. I want this to be done using ls and simple looping constructs.
View 6 Replies View RelatedI need to search for a string "teststring" in all *.java files coming under /home/user1/ (including subfolders). How can I do it in linux via shell command.
View 5 Replies View RelatedWhat is shell scripting? what is 'bash'?
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