I have this script in the past for csh: Code: ./a.out |& tee prints.txt which will redirect all printfs in the C program to the prints.txt file and at the same time show them in the console. How do you do this in bash? I have seen this, [URL] but it does not work for my bash and sh shells. It says:
Code: -bash: syntax error near unexpected token `&' and
Code: -sh: syntax error: unexpected "&"
I am trying to grep multiple numbers from file, grep does have the -f option for that.
Code: grep -f <`seq 500 520` /etc/passwd I know this could be done with
Code: for i in `seq 500 520`; do grep "$i" /etc/passwd; done But my question is fare more behind this example. It is possible to redirect one command output which will be treat as a content of file for another command ?
I am using:
user@unknown:~$ sudo command -option > log
to save the results of "command" to the file "log", but I'd like to also get the result on the terminal, is this possible?
I am using ubuntu 10.04 lts.
I have got a script with an outer and inner loop. The inner loop issues loads of echo's which need to be redirected to a log file determined by the outer loop. The obvious solution is to redirect every echo to >$LOG and set LOG in the outer loop.
Code:
for f in $FILES ; do
LOG=<logfile>
for l in $LINES ; do
[code]....
it is possible to map stdout to $LOG in the outer loop without having to redirect every subsequent individual command output?
I need some help recovering from a "slight" screwup. We just moved 3 TB of data from one RAID Array to another. Low lever archive files. This was done with a regular cp (for some reason) and now we have lost all the timestamps on the files, and we urgently need to get the timestamps back on these files.
We are running Ubuntu 9.10 Server and we have mounted the following
1. /mnt/old-raid ##Old raid from the old server
2. /mnt/new-raid ##New raid on the server
I know we can read out the timestamp on the old server using the command stat -c '%Y' <<filname>>
I know we can change the timestamp of the file, using the command touch -d '<<date>>'
To get from the stat -c date to the input date in touch we need to use date -d @<<timestamp>> +'%d %b %Y %R'
So my question is, how can I create a loop that will list all files in a folder, get their timestamp and update the old timestamp with the new?
I'm struggling on installing a KONICA-MINOLTA printer magicolor 4695MF printing properly with Linux Mint Debian Edition (up to date). The test page works fine...
KONICA-MINOLTA delivers 2 PPDs: one for standard printing and one for OpenOffice printing (available on the KONICA-MINOLTA support site).
Leaving a side the one for OpenOffice which is poor in using the capabilities of the printer, I concentrate only on the global one (M4695PX.ppd).
It's much more difficult for other applications, starting with EVINCE: some PDF files are printed properly (i.e. those generated in OpenOffice by the CUPS PDF printer), others come out as one only blank page, regardless to the original length of the document.
So documents received from 3rd party may be "printable" or not. And trust Murphy, the most critical aren't printed...
Attached, the troubleshooting file generated by [system-config-printer] => [URL] ...
Say my shell script takes like 5 hrs, with 5 statement one statement taking 1 hr each after 30 mins, my session disconnect, what will happen?
1) my 1st statement completes then no other statement get executed?
2) my all statements executes and then finish?
3) my 1st statement will also not be completed
I can see my 1st statement through processes, problem with 'ps' it don't show bash script name, even if it is in memorry Also, what i need to put in my script so next time even after even disconnect my scripts remaining executing (other then nohup)
I know that set -x can be used for debugging a shell script.But I want to redirect the output of set -x to a text file.eg: Say test.sh is my script,
View 3 Replies View Relatedi want to redirect application to file.i m redirecting it by command
konsole -e 'application name' >> applog.txt
but it is not working.
It takes me a while to log in the splash screen just sits there for ages before i get to the desktop. Never used to be this slow and I'm not sure why. Firstly, I'm running Ubuntu 11.04, standard DE. I do have conky starting up in a script but it has the & at the end of the line so I didn't think this would cause it (or is there some special case for log in time on how & is treated?). However as a test I will comment out the line in the script and see if it is the cause.
However just for general knowledge and in case that isn't the problem, how does one go seeing what is happening during the time from when one log's in and the desktop is displayed? Is there some kind of log that shows the date/time that can be enabled or is there a debug mode that can be enabled somehow via special keys or maybe from grub?
I have two systems running on linux. system one is running with RHEL 5.4/X86_64 hardware, system two is running with RHEL 5.3/i686 hardware. One filesystem is shared from system two and mounted as NFS on system one. Now when i do a copy from local filesystem to the NFS share from system one,it shows as follows
Quote:
-rw-r--r-- 1 xkinved rbak1 30 Mar 3 2011 king
But if i do copy with -p option then it shows right time stamp. Both machines are running with slight(minutes) different in time. Does this could be cause for this problem? The problem is happening while i do FTP from some other machines too.
I want to use history command to show the time stamp, user id, ip address, command logged
View 1 Replies View RelatedI multi-boot several Linux distributions with an assortment of additional data partitions. I get frustrated whenever fsck is forced during boot. (It ONLY happens when I'm in a hurry don't you know...) So I wrote a script to automate forced fscking when I do have the time. (And/or while I'm doing something else in another workspace.
Because I multi-boot, I've learned that udev doesn't always assign the same device name to each drive for all distributions. I've had the same partition identified as hda5, sda5, & sdb5 by different distributions (without doing anything to affect the boot order) So my solution is to keep a list of partitions in a specific file on each distro with valid device names according to that distribution's udev process. Actually I'd use LABEL= instead but the labels don't show up in /etc/mtab, and I like to make sure a partition isn't mounted before I try to fsck it.
I can make this work in a for loop using cat. But I've seen so many things about NOT using cat that I wanted to rebuild my script. I can make this work with a redirect instead of cat via a while loop, But I "LIKE" old style for loops. But I can't seem to find a way to make a redirect work with one. I thought this might make a good first �LinuxQuestions.org� question. I'm also open to any other suggestions on better/alternative methods... Is it possible to redirect from a file into an actual for loop?
My script is as follows:
Code:
#!/bin/bash
# FsckEm I script to force file system checking on unmounted ext2/ext3/ext4
# partitions in preselected list. FsckEm accepts no options. Partition
[code]....
I was trying to redirect the output of two variables to different columns of a .csv file in MS excel like this,
Code:
echo "$a $b" > abc.csv
But I am getting both $a and $b in the same column, is there anything I can use instead of to move the value of $b to the next column? Or is there a good different approach to do it?
How can I make the Linux ping to show the requests 'time out' instead of omitting the output?
Just like the Windows version of ping.
I wrote a short script that sleeps for 30 seconds then outputs "Done" to the screen:
sleep 30
echo Done
now I want to re-direct the output to a file, I tried:
./scriptName& > fileName
Didn't work, "Done" still came out to the screen.
I have a python script that when run outputs to screen.
eg.
./international_sms_check.py 0403000511 919227434827
TS 21 check ok
TS 22 check ok
sms successfully delivered from 61403000511 to 919227434827
But when I try:./international_sms_check.py 0403000511 919227434827 > test
The file test is created but there is nothing in it.if I try ls > test this works fine with output of ls redirected to file test.
I create a bash script that writes another bash file. But in the generated bash file I want to write a bash command in the file and not executing it.Here's my bash file:
Code:
#!/bin/bash
cat > ~/generateGridmix2data.sh << END
[code]...
I would like to modify Bash Prompt so it does not show the whole $PATH but just the current and parent directory. I am using Ubuntu.
View 3 Replies View Relatedif I'm posting to the wrong forum. Be so kind to tell me where to better ask this question, as I'm really not finding the right words to google for.So, I have a shell application (fdb) which is a Flash debugger. I want to run it using bash script, capture it's output and pass it the commands (it can read from STDIN). The reason I want to do so is that Flash Builder (the IDE for Flash development) is plain stupid when it comes to compilation, and it won't allow me to compile any file in the project... so, I found out that I can make Eclipse to run an external tool. This external tool is my *.sh file whichches the compiler, and then it launches the debugger.The Eclipse console can display the compilation results, or errors. When I run the debugger it can even pass the input from Eclipse console to the debugger, however, the output from the debugger isn't shown.
View 1 Replies View RelatedI want to do the following redirectin inside a bash script :
1. all the stdout will be redirected to a /tmp/log
2. all the errors will go to the stderr and also to the /tmp/log.
The following inside a bash script is not working, WHY and HOW to do it:
Rest of the bash script.
I want to get the time from power on system to showing user login view in Linux, how to do? Can it work only with shell?
View 2 Replies View RelatedI am writing a script in which I am using AWK to append to a line in a file and save the file. The command I am using is:
Code:
awk '{s=$0; if ( NR==4 ){s=s ":/usr/java/jdk1.6.0_19/bin" } print s;}' $appName > $appName.new
[code]...
I'm working on some scheduled task script files to keep nightly backups of some of our database information in place, and it's a bit annoying when they blow up. I know how to redirect stdout and stderr to a flat file I can view when I come in, and I know that 2>&1 maps them both to the same file (whatever was named in 1). However, I'm running into some cron-time situations where it's easier to have the two streams together, and other cron-time situations where it's easier to have them separated. I can't really tell which is going to happen; is there some way I could create both kinds of output file for my scripts, so that I've got a std_err only file and an interleaved std_out/std_err file?
Note: I've looked at the 'tee' command, but I don't think it will work for what I'm after. 'tee' appears to only work with stdout; I'm trying to work with stderr.
Below is data taken from my dedicated server:
[Code]...
I need a script that I can run on an hourly basis that will:
1. Calculate the total downtime since the first date
2. The overall downtime percentage
3. Store this data in a file at /home/bla/file.txt, in the following format: TotalDowntime=03:02:02 Average=0.01%
I have a script that is supposed to run after a job is sent to a printer that prints a text file to disk. It is supposed to turn that text file in to a PDF. How I do this is my making a fifo /dev device that cats the print job to lpr and then runs my script. The script works expect for 1 thing. I have to use dos2unix to remove some extra characters that shouldn't be in there. I've also tried used sed and that didn't work either.
I should say they both work from the command line, just not when used in the fifo/dev. I know there are weird things that can happen when not running a script from the command line, and maybe I'm doing this all wrong. Part of my script works fine, but dos2unix doesn't work in my script. Sed also doesn't work in my script. But a2ps works and so does ps2pdf.
im trying to output a list of running processes via a shell script. At the moment i got this which outputs the processes to a text file called out.
echo $(ps aux) >>out
The problem is though, the processes are all just one big block of text which makes it hard to read. Does anyone know how to sort the output to a text file so that it prints to the text file at 1 process per line? I know its probably simple but im very new to linux.
I made a BIG mistake and tried to print a PDF document from Evince 2.28.2. Evince sends a garbage filled print job to the queue that results in nothing but garbage being printed. I noted the problem an tried to kill the print job but could not because it does not show up in the print queue. It appears that the printer sent an error back to the print system and the print system now continues to print the job forever - that is, anytime openSUSE is running, even after reboots.
Note that printing the test page works and that the printer also works fine with gedit and OpenOffice.
If I go to Control Center -> Printing then right click on the icon for the printer and click View Print Queue, the print queue is empty.
In YaST Control Center -> Printer -> Policies the "Specify error policy" is set to "abort and delete the job and proceed with the next job." The "Apply this error policy to all local printer configurations" checkbox was checked when this policy was set. If this is what should have ultimately killed the job it did not work.
how to stop the print system from trying to print this garbaged print job. It has been trying to print the same garbaged print job for the last five days!
I have a set of bash scripts that I'm running that automatically build a set of packages for me and redirect their output into logs. Basically, I have a bunch of lines that are something like this: ${CONFIGURE_DIR}/configure &> ${LOG_DIR}/log or cd ${CONFIGURE_DIR} && make &> ${LOG_DIR}/log, etc.
This is supposed to make the entire process silent. However, sometimes with some packages some output leaks to my console (either stdout or stderr). I'm thinking that maybe the configure scripts/make are executing commands within new shell instances that don't inherit my redirect, or something to that effect.
Another reason for thinking this is that in another part of my script I detect errors when running make by testing with "if [ $? -ne 0 ]", and if the redirect leaks to my console and also the leaked output indicates that the build failed ("make: Error" and so on), then my $? test fails (i.e., it thinks that $? == 0, whereas a failed make should return a non-zero value). It's as if my original script can't "see" the results from child commands executed from later scripts.
I cannot redirect output from commands such as iptables, iptables-save, and ifconfig. For example, any of the following DOESN'T work ( as root ):
Code:
iptables > tmp
iptables-save > tmp
ifconfig > tmp
The file tmp is ALWAYS blank, that is, 0 bytes in size. Wackier things DO work, such as:
Code:
echo "`iptables-save`" > tmp
iptables-save | tee tmp
Other commands like:
Code:
ls > tmp
DO work as expected.
Note that this problem happens regardless if I log-in remotely via ssh or locally on the computer in question. I am clueless as to what is causing this. Any ideas?The box is running 2.6.25-14.fc9.i686 and boots to runlevel 3. The modifications I've made to the box since installing the OS are things like compiling/installing latest OpenSSH,OpenSSL,httpd,BerkeleyDB,subversion,zlib etc -- nothing really out of the ordinary I'd say.