1. Check the file size
du -h (the size of all files under the folder)
ls -lh
ls -lh
ls -l|grep The file name displays the file size in K
ls -l --block-size=m|grep The file name starts with M displays file size
ls -l --block-size=G|grep file name displays file size in G
2. View hardware devices
df -h
sudo smartctl -a /dev/nvme0n1 (specific location)
3. What hardware devices are there?
lsblk
sudo lsblk --scsi (list suppliers)
lsscsi
4. Disk mount
sudo mkdir /data
sudo mount /dev/nvmeOn1 /data
5. Change file permissions
sudo chmod 777 file name/folder
6. Back to the previous Once the directory
cd -
7. Delete all the files under the folder
to the directory
rm -f *
8. Check whether the kernel
sysctl kernel.kptr_restrict
sysctl -w kernel.kptr_restrict=0
9. Check the memory and clear the memory to check the cache command
free -m
command to clear cache
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches to view cached commands
free -m
command to clear cache
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches to view cached commands
free -m
command to clear cache
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches to view cached commands
free -m
command to clear cache
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches
to view cached commands
free -m
command to clear cache
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches
Change the ownership of the file
sudo chown wjxt:wjxt ./file
csv file sorting
sort -t ',' -k2,2 -k3,3n -k1,1 ./input file
grep | sort
head -n1 ./2022-04-02-14-32-58.csv [input file ] > cpu.csv [output the first line to cp.csv]; tail -n+2 ./2022-04-02-14-32-58.csv [start from the second line]| sort -t ',' -k2,2 -k3,3n -k1,1 >> cpu.csv [Separate by commas, first sort by the second column, then sort by the third column, in numerical order, then sort by the first column, output to cpu.csv]
head -n1 ./2022-04-02-14-32-58.csv > cpu.csv ; tail -n+2 ./2022-04-02-14-32-58.csv | sort -t ‘,’ -k2,2 -k3,3n -k1,1 >> cpu.csv
Instructions to mount the remote server to the local
sshfs pm8:/home/wjxt/ly/mount location
755 permission
mount -t is required for both the mount location and the remote location
Uninstall command
sudo umount /dev/nvme0n1
View the number of files in the folder
ls | wc -l
When using the server remotely, I hope to close the dialog box locally
The program continues to run
tmux new -s ly
exit
ctrl+B and then press D
to re-enter
tmux attach -t ly
to kill
tmux kill-session -t ly
Mount remote folder to local
The mount command
sshfs wsl:/home/ly ./ mount location
does not need to use sudo,
and an error will occur
Change file ownership
## 创建用户和组
sudo chown wjxt:wjxt ./file
Create a file
Copy the specified file to
find “/home/wjxt/ly/cpu_test/logs/2022-04-06-15-30-44/” -name “*log” | xargs -i cp {} “/home/wjxt/ly/cpu_test/logs/log”
find "/home/wjxt/ly/cpu_test/logs/2022-04-06-15-30-44/" [specified file] -name "*log" [specified file keyword] | xargs -i cp { } "/home/wjxt/ly/cpu_test/logs/log"【Copy to specified folder】
create your own user
sudo useradd ly
create password
sudo passwd ly
Change folder ownership
sudo chown -R wjxt:wjxt ./file
kill ctrl+z paused file
jobs -l
find process number
kill -9 process number
jobs -l confirm all files are stopped
remote port forwarding
Link VPN
curl google.com
Copy between different users on the same machine
scp filename [email protected]:/transferred file name
scp /home/wjxt/ly/proxy_setup.sh [email protected]:/home/ly/soft
Copy some files to the specified folder
find PMEM_DAX* | xargs -i cp {} …/… file address copied to
Count the size of each row and record it
head -n1000000 ./transactions.json | awk '{print length}' | sort -k1,1n > ./length.txt
statistics of the first 100W
network
Details: /leveldb/NVM-DAX/shell.txt