Commands using df (48)
-
You have an external USB drive or key. Apply this command (using the file path of anything on your device) and it will simulate the unplug of this device. If you just want the port, just type : echo $(sudo lshw -businfo | grep -B 1 -m 1 $(df "/path/to/file" | tail -1 | awk '{print $1}' | cut -c 6-8) | head -n 1 | awk '{print $1}' | cut -c 5- | tr ":" "-") Show Sample Output
30echo $(sudo lshw -businfo | grep -B 1 -m 1 $(df "/path/to/file" | tail -1 | awk '{print $1}' | cut -c 6-8) | head -n 1 | awk '{print $1}' | cut -c 5- | tr ":" "-") | sudo tee /sys/bus/usb/drivers/usb/unbind -
-P uses the POSIX output format, which makes information on each file system always printed on exactly one line. "column -t" makes a table from the input. Show Sample Output
20df -P | column -t -
In my example, the mount point is /media/mpdr1 and the FS is /dev/sdd1 /mountpoint-path = /media/mpdr1 filesystem=/dev/sdd1 Why this command ? Well, in fact, with some external devices I used to face some issues : during data transfer from the device to the internal drive, some errors occurred and the device was unmounted and remounted again in a different folder. In such situations, the command mountpoint gave a positive result even if the FS wasn't properly mounted, that's why I added the df part. And if the device is not properly mounted, the command tries to unmount, to create the folder (if it exists already it will also work) and finally mount the FS on the given mount point. Show Sample Output
20(mountpoint -q "/media/mpdr1" && df /media/mpdr1/* > /dev/null 2>&1) || ((sudo umount "/media/mpdr1" > /dev/null 2>&1 || true) && (sudo mkdir "/media/mpdr1" > /dev/null 2>&1 || true) && sudo mount "/dev/sdd1" "/media/mpdr1") -
..not guaranteed to always be accurate but fun to see how old you Linux installation is based on the root partitions file system creation date. Show Sample Output
12sudo tune2fs -l $(df -h / |(read; awk '{print $1; exit}')) | grep -i created -
Very useful set of commands to know when your file system was created. Show Sample Output
9df / | awk '{print $1}' | grep dev | xargs tune2fs -l | grep create -
put it in crontab to get an alert when / is over 89% utilization.
4[ $(df / | perl -nle '/([0-9]+)%/ && print $1') -gt 90 ] && df -hP | mutt -s "Disk Space Alert -- $(hostname)" admin@example.com -
It is a pain grep-ing/sed-ing/awk-ing plain old df. POSIX it! Show Sample Output
3df -P -
3df -h |awk '{a=$5;gsub(/%/,"",a);if(a > 50){print $0}}'
-
Reports all local partitions having more than 90% usage. Just add it in a crontab and you'll get a mail when a disk is full. (sending mail to the root user must work for that) Show Sample Output
2df -l | grep -e "9.%" -e "100%" -
You can use this one-liner for a quick and dirty (more customizable) alternative to the watch command. The keys to making this work: everything exists in an infinite loop; the loop starts with a clear; the loop ends with a sleep. Enter whatever you'd like to keep an eye on in the middle. Show Sample Output
2while (true); do clear; uname -n; echo ""; df -h /; echo ""; tail -5 /var/log/auth.log; echo ""; vmstat 1 5; sleep 15; done -
Show disk space info, grepping out the uninteresting ones beginning with ^none while we're at it. The main point of this submission is the way it maintains the header row with the command grouping, by removing it from the pipeline before it gets fed into the sort command. (I'm surprised sort doesn't have an option to skip a header row, actually..) It took me a while to work out how to do this, I thought of it as I was drifting off to sleep last night! Show Sample Output
2df -h | grep -v ^none | ( read header ; echo "$header" ; sort -rn -k 5) -
2df -PH|column -t
-
Exclude 400 client hosts with NFS auto-mounted home directories. Easily modified for inclusion in your scripts. Show Sample Output
1DIR=. ; FSTYPE=$(df -TP ${DIR} | grep -v Type | awk '{ print $2 }') ; echo "${FSTYPE}" -
tune2fs also provides the same information . But the information does not give the current usage , it gives the information when the file system was last mounted. http://www.zaman4linux.in/2010/10/using-up-all-the-free-inodes.html Show Sample Output
1df -i <partition> -
Just the commands for the lvreduce I keep forgetting.
1# umount /media/filesystem; e2fsck -f /dev/device ; resize2fs -p /dev/device 200G #actual newsize#;lvreduce --size 200G /dev/device; mount /media/filesystem; df -h /media/filesystem -
show off how big your disks are Show Sample Output
1df -h --total | awk 'NR==1; END{print}' -
1df -klP -t xfs -t ext2 -t ext3 -t ext4 -t reiserfs | grep -oE ' [0-9]{1,}( +[0-9]{1,})+' | awk '{sum_used += $1} END {printf "%.0f GB\n", sum_used/1024/1024}'
-
1df -klP -t xfs -t ext2 -t ext3 -t ext4 -t reiserfs | grep -oE ' [0-9]{1,}( +[0-9]{1,})+' | awk '{sum_used += $2} END {printf "%.0f GB\n", sum_used/1024/1024}'
-
0df -kFufs
-
0#!/bin/sh #du.sh i=`hostname -i` df -h > /tmp/space.txt echo "server $i " >> /tmp/space.txt uuencode /tmp/space.txt space.txt | mail -s "HDD usage $i" email@email.com
-
0clear; for i in `cat thehosts` ; do ssh $i "cat uname -a ; /etc/redhat-release; cat /proc/cpuinfo | tail -n 25 | egrep '^processor|^model name' "; free ; df -h ;done
-
0df -kh /dev/vg0*/lv*
-
No need for grep | awk. -P on df will force the mount point to be on the same line as the device
0df -P | awk '$6=="/media/KINGSTON" {print $1}' -
0nohup df -k | sort -rn 12
-
Find out the earliest installation time of a linux system by getting the / filesystem creation time. This example is only valid the os is installed on an ext2/3/4 filesystem.
0tune2fs -l $(df -P / | awk 'NR==2 {print $1}') | sed -n 's/^.*created: *//p' - 1 2 >
What's this?
commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
Check These Out
Stay in the loop…
- Follow the Tweets.
-
Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10 - Subscribe to the feeds.
-
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
- » all commands
- » commands with 3 up-votes (commandlinefu3)
- » commands with 10 up-votes (commandlinefu10)
- » commands using df