Questions tagged [watch]

watch - execute a program periodically, showing output fullscreen

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How can I watch a folder on an sftp server for new files?

I log in to a sftp server, and to see the files I type ls. Is there any way to recursively watch a folder? For now I just keep typing ls -tlh. Is there a way for that to happen without me typing it? ...
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Debouncing events in `fswatch` or other file monitors

Tools like fswatch allow to run a program after file changes. Is there a unix command to wait for, say, one second without changes before it fires in case there was a change before that ? right now my ...
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Utilize `fswatch` to improve `rsync`'s speed?

I have some huge folders containing about 40000 files (and much, much more gitignored files like node_modules), and I want to rsync to a remote machine. Currently, I use a simple script like run_rsync;...
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watch --color doesn't work when a pipe is involved?

The following demonstrates that watch works with color, but not when a pipe is involved. $ touch test.txt $ ls | grep --color test.txt test.txt # This IS colored ...
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BSOD Clock watchdog timeout Windows 10

ISSUE OS: Windows 10 Enterprise. HARDWARE: MSI X370 SLI PLUS, Ryzen 1600, 32GB DDR4 2133, 250G SSD, 850W TT Gold PSU and Gigabyte RX580 8GB ISSUE DESCRIPTION: Fresh install, OS works, installed ...
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Watch + pipe + multiple arguments

I have a command diff -y <(xxd FILE) <(xxd FILE_) | colordiff and i want to put it into watch routine. Something like that: watch -n 0,1 'diff -y <(xxd FILE) <(xxd FILE_)' But i have an ...
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1 answer
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Using watch command with "echo -e"

I want to monitor rows of a dynamic file and I use watch command for this. I have 2 files: test-status and iplist_test. I control something in iplist_test and I type this output to test-status. ...
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2 votes
1 answer
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Separating files in watch command

I have 3 files and I want watch the changes of these files with 'watch' command. But these 3 files have a lot of row and I just want see the last 3 rows with 'tail'. There is no problem at here. I can ...
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Integrating "watch" with "top" logging until finished - HOW?

I stumbled across this link: "watch" the output of a command until a particular string is observed and then exit I know the PID of the process. I want to log the process "resource-...
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Watch folder and rename file extension

Good day, I'm trying to find a way to watch a folder, and as soon as it see's an xml file/s, it will change it's extension to .txt I am trying to do this in powershell, hope this question find you ...
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1 answer
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Is there a Unix command to record changes to output of another command?

I have a long running operation that affects some state. That state is shown by running a certain command, say showst. I want to see have a log of all the possible outputs showst will display during ...
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3 votes
1 answer
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How do I live monitor on linux what files get accessed created modified and deleted?

How do I monitor from this moment on what files get accessed / modified / created / deleted. (in live mode), similar to fseventer / fslogger?
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5 votes
2 answers
6k views

Watch with awk command

How do you watch a command like? awk 'NR%2==0 {printf "%s %8.0f", $1, $5}' filename.txt Preceding this with "watch" gives this error: awk: cmd. line:1: fatal: cannot open file `{printf' for reading ...
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1 vote
1 answer
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Detecting new USB devices with bash?

I'm writing a bash script that needs to detect when a usb storage device is inserted and assign it to a variable that would otherwise, typically look something like: usb=/dev/sdb. I have a few ...
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26 votes
3 answers
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How do I get systemctl to print in color when being interacted with from a non-tty?

When I run a command like this: # systemctl status plexmediaserver I get nicely colored output. But when I run the following command: # watch -n300 --color systemctl status plexmediaserver Is ...
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Using "watch" to detect difference in value and write to a file

I am trying to catch the cause of an intermittent %CPU spike in a server with the command: watch -n .5 "ps aux | sort -rk 3,3 | head -n 2" where it displays the process with the highest %CPU every .5 ...
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1 answer
410 views

Preserve colors with watch -n

I am running watch tail -n 15 20151217.log and my output looks like 12-17 04:42:52 DEBUG [31mXYZT 10 91.5[0m Instead, I want to see it as colored text. What can I do? I don't want to use ...
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2 answers
666 views

"awk" not working when using it with "watch"

In order to watch my IPv6 traffic totals I want to run this command: netstat -s -6 | grep -i octet | grep -vi cast | awk '{ print $2/(1024*1024*1024) }' combined with "watch -n1", so it gets run ...
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2 votes
1 answer
523 views

Function using watch on command with command line arguments

I want to run watch on a command which uses an optional command line argument, like this: function queue() { watch -n 10 'squeue -p ${1:-default} -o "%.8i" ' } but the command-line argument isn'...
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2 answers
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Copy file on file change in Windows 8.1

I would like to set up a rule in Windows 8.1 to copy a certain file to another location whenever it changes. How can I accomplish this?
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2 answers
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Combine the results of a CAT and TAC in a single window in Linux

I have two log files which I would like to view on my screen simultaneously. Below you can see my commands: pi@raspberrypi ~ $ watch -n 1 tac /home/pi/log/log.txt pi@raspberrypi ~ $ watch -n 1 cat /...
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1 answer
951 views

Any apps that auto sync local to remote on save for mac?

Does Panic's Transmit has this feature? For example you set it to watch a particular folder, and any file changes in that folder gets uploaded to the remote automatically? They were highly ...
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1 vote
1 answer
215 views

Show last 5 opened processes in terminal?

I am trying to have a terminal showing the last 5 processes opened. This is helpful for my debugging. At this point I have watch ps -ef --sort=start_time This works fine but it shows all processes ...
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2 votes
1 answer
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watch mysql output w/ tabular columns

how come when I run a mysql query and dump the results to stdout I get a pretty printed table ie: > mysql -e "describe <table>" <database> +------------+--------------+------+-----+----...
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Linux watch command: "--differences" not working

I would like to use the linux watch command and have seen that there may be a "culmulative" (--differences=) parameter but this doesnt appear to be working. Basically I would like to do the following ...
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4 votes
2 answers
5k views

Continuously check netstat output for a particular program

I have a android emulator running on port 5554. I want to continuously watch the netstat output concerning emulator stuff. Right now I have to manually execute this command every time sudo netstat -...
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9 votes
4 answers
6k views

How do I use the watch and jobs commands together in Bash?

How do I use the watch command with jobs command, so that I can monitor when a background job is finished? I execute it as follows, but I do not get the output from jobs: watch jobs If I run jobs ...
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5 votes
4 answers
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Is there a linux command that lets me color-code the result of another command?

I'm running a watch on a command to monitor the number of open connections for a service we're diagnosing. I need to keep an eye on it while doing other work, to help other developers identify when ...
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2 votes
2 answers
2k views

Run two watch commands simultaneously

I want to run two executables in the foreground by typing one line of code or running a shell script. These executables watch a directory and recompile some code while outputting their status to ...
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2 votes
1 answer
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How can I get gnu watch to run in the background?

If I start a watch command in the background, it stops. Bringing the job to the foreground makes it run again, but I want this to run in the background. $ watch ./do-something.sh & [1] 97673 [1]+ ...
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39 votes
8 answers
67k views

Store the output of date and watch command to a file

I am a newbie to linux and I am trying to watch a command and try to log it into a file. I tried watch -t -n 10 "(date '+TIME:%H:%M:%S' ; ps aux | grep "pattern" | wc -l)" >> logfile and am ...
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  • 533
2 votes
2 answers
1k views

Changing terminal size affects the output of grep inside a watch command

If I run a command like: watch "ps -ef | grep '^foo.*bar'" and the matching output line of ps -ef is a long line like foo <lots and lots of text here> bar whether this line is output is ...
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  • 977
23 votes
3 answers
19k views

Using the watch command with an argument that contains quotes

I'm trying to get watch to work correct with commands that contain quotes, and the watch man page isn't very detailed about how quotes work. To give a concrete example, how can I run the following ...
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1 vote
1 answer
234 views

How can I fix a problem with standard error screwing up the output of watch?

Specifically, I am trying to run the following command on both CentOS and Fedora14 (same issue with both) watch sudo jmap -heap 31945 However, there are a few lines of standard error that screw up ...
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  • 977
5 votes
1 answer
286 views

Command-line tool to measure how fast a file is growing?

Is there a command-line tool to measure how fast a text file is growing, in units of lines/second? For small-ish files, I can do something with watch and wc -l, but that measures the file anew each ...
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  • 315
217 votes
4 answers
52k views

Using watch with pipes

I'd like to run this command: watch -n 1 tail -n 200 log/site_dev.log | grep Doctrine But it does not run, because "I think" that the grep tries to run on the watch instead of the tail... Is there ...
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  • 2,519
81 votes
4 answers
33k views

bash watch command with colors preserved

From man watch: Non-printing characters are stripped from program output. Use "cat -v" as part of the command pipeline if you want to see them. So how do I use cat -v if I want to see the ...
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3 votes
3 answers
7k views

TV Tuner to record / show multiple channels at the same time [closed]

I need a cheap mode to record / watch multiple TV channel at the same time on a single PC. Can anyone recommend me any solution(TV Tuner, Application) that can help me solve this problem?
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  • 310
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6 answers
4k views

How to block website from reading my IP?

I want to watch videos on a website but I can only access my country's version. Whenever I type in say .ca (Canada) instead of .il (Israel), I get redirected to .il. How can I surpass that?
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