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Commands tagged process

Terminal - Commands tagged process - 32 results

echo "vertical text" | fold -1

2009-10-05 23:20:14

User: zude

Functions: echo fold

Tags: column headers redirection paste process substitution

Up
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Print text string vertically, one character per line.

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; done; }; export -f sleeper

2009-09-21 07:36:25

User: AskApache

Functions: echo export sleep

Tags: GPG job control echo loop function sleep proc process background timed output wait

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Function that outputs dots every second until command completes

Very useful in shell scripts because you can run a task nicely in the background using job-control and output progress until it completes.

Here's an example of how I use it in backup scripts to run gpg in the background to encrypt an archive file (which I create in this same way). $! is the process ID of the last run command, which is saved here as the variable PI, then sleeper is called with the process id of the gpg task (PI), and sleeper is also specified to output : instead of the default . every 3 seconds instead of the default 1. So a shorter version would be sleeper $!;

The wait is also used here, though it may not be needed on your system.

echo ">>> ENCRYPTING SQL BACKUP" gpg --output archive.tgz.asc --encrypt archive.tgz 1>/dev/null & PI=$!; sleeper $PI ":" 3; wait $PI && rm archive.tgz &>/dev/null

Previously to get around the $! not always being available, I would instead check for the existance of the process ID by checking if the directory /proc/$PID existed, but not everyone uses proc anymore. That version is currently the one at http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html but I plan on upgrading to this new version soon.

echo "vertical text" | grep -o '.'

2009-09-11 03:45:04

User: dennisw

Functions: echo grep

Tags: column headers redirection paste process substitution

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Print text string vertically, one character per line.

Define a function

vert () { echo $1 | grep -o '.'; }

Use it to print some column headers

paste <(vert several) <(vert parallel) <(vert vertical) <(vert "lines of") <(vert "text can") <(vert "be used") <(vert "for labels") <(vert "for columns") <(vert "of numbers")

$(while [ ! -z "$(pgrep rsync)" ]; do echo; done; echo "rsync done" | mailx user@example.com) > /dev/null &

2009-08-14 19:46:59

User: matthewbauer

Functions: echo mailx

Tags: Process Management while rsync email mail process mailx

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Will email user@example.com when all Rsync processes have finished.

This will email user@example.com a message with the body: "rsync done" when there are no processes of rsync running. This can be changed for other uses by changing $(pgrep rsync) to something else, and echo "rsync done" | mailx user@example.com to another command.

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lsof -p <process_id> | wc -l

2009-07-20 17:46:54

User: virtualshock

Functions: wc

Tags: lsof wc process

-1

Up
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View open file descriptors for a process.

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pkill $1

2009-07-20 12:47:41

User: svg

Tags: kill, pkill, process

-5

Up
Down

Kill a process with its name

There's already a proper command for what the former alternative tried to script

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xprop | awk '/PID/ {print $3}' | xargs ps h -o pid,cmd

2009-02-16 07:55:19

User: jackhab

Functions: awk ps xargs

Tags: Process Management windows process GUI

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Click on a GUI window and show its process ID and command used to run the process

This command is useful when you want to know what process is responsible for a certain GUI application and what command you need to issue to launch it in terminal.

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