Commands using sum sorted by votes

Commands using sum (6)

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total percentage of memory use for all processes with a given name

This command will add up RAM usage of all processes whose name contains "java" and output the sum of percentages in HRF. Also, unlike the original #15430, it wont fail on processes with a usage of >9.9%. Pleases note that this command wont work reliably in use cases where a significant portion of processes involved are using less than 0.1% of RAM, because they will be counted as "0", even though a great number of them could add up to significant amounts. Show Sample Output
This is sample output - yours may be different.
```
43.5 % of RAM
```
4

ps -eo pmem,comm | grep java | awk '{sum+=$1} END {print sum " % of RAM"}'

bugmenot · 2016-02-10 09:00:56 19
Count the number of pages of all PDFs in current directory and all subdirs, recursively
This is sample output - yours may be different.
3

find . -name \*.pdf -exec pdfinfo {} \; | grep Pages | sed -e "s/Pages:\s*//g" | awk '{ sum += $1;} END { print sum; }'

unixmonkey3987 · 2009-08-10 16:28:24 46
Shows a specific process memory usage
This is sample output - yours may be different.
1

mem() { ps -C "$1" -O rss | awk '{ count ++; sum += $2 }; END {count --; print "Number of processes:\t",count; print "Mem. usage per process:\t",sum/1024/count, "MB"; print "Total memory usage:\t", sum/1024, "MB" ;};'; }

mikhail · 2022-01-23 16:14:24 580
Total space used by open but deleted files

A potential source of a full filesystem are large files left open but have been deleted. On Linux, a file may be deleted (removed/unlinked) while a process has it open. When this happens, the file is essentially invisible to other processes, but it still takes on physical space on the drive. Tools like du will not see it.
This is sample output - yours may be different.
0

sudo lsof -nP | awk '/deleted/ { sum+=$8 } END { print sum }'

jeffskinnerbox · 2015-09-19 00:45:23 16
Sum of RSS utilization in Linux

This command shows you how much is RSS utilization and real memory Show Sample Output
This is sample output - yours may be different.
```
4046.19
```
0

ps aux | awk '{sum+=$6} END {print sum / 1024}'

ara4sh · 2017-07-08 05:40:24 19
Add another column printing cumulative sum of entries in first column, sum being less than or equal to 100
This is sample output - yours may be different.
-1

for f in .; do awk 'BEGIN {sum=0;flag=0} {sum=sum+$1; if (flag == 0) { print $1"\t"sum > "cumulative.'$f'" } if (sum > 100) flag=1 }' $f; done

user1234 · 2013-10-05 13:35:30 7

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To print a specific line from a file

Just one character longer than the sed version ('FNR==5' versus -n 5p). On my system, without using "exit" or "q", the awk version is over four times faster on a ~900K file using the following timing comparison: $ testfile="testfile"; for cmd in "awk 'FNR==20'" "sed -n '20p'"; do echo; echo $cmd; eval "$cmd $testfile"; for i in {1..3}; do time for j in {1..100}; do eval "$cmd $testfile" >/dev/null; done; done; done Adding "exit" or "q" made the difference between awk and sed negligible and produced a four-fold improvement over the awk timing without the "exit". For long files, an exit can speed things up: $ awk 'FNR==5{print;exit}'

Remove all the files except abc in the directory

Finds all files in the current directory and deletes them besides file called "abc"

Rsync two directories with filtered extensions

Another way to calculate sum size of all files matching a pattern

Here the pattern is '*.jar', you could pass in any pattern. Another, maybe nicer way to do this is http://www.commandlinefu.com/commands/view/1921/summarise-the-size-of-all-files-matching-a-simple-regex You could replace sed with tr

Watch the disk fill up

While copying a large file that may take up a good chunk of your hard drive, start the copy and run this command concurrently. It will print out the disk information every second. It's pretty handy when you have a large copy with nothing to monitor the progress.

Introduction to user commands

Tested on debian and ubuntu. Translations could be useless, so "LANG=C man intro" is a better alternative.

Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously

Backup all MySQL Databases to individual files

Backups all MySQL databases to individual files. Can be put into a script that grabs current date so you have per day backups.

Execute a command, convert output to .png file, upload file to imgur.com, then returning the address of the .png.

My key is the anonymous one, is good for 50 post an hour with a maximun number of uploads a day, probably will run out, if that happend you can get a free key at the site.

Getting ESP and EIP addresses from running processes

'ps' let you specify the format that you want to see on the output.

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Commands using sum (6)

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