LAMPP here
XAMPP here
Docker here
sudo apt-get install ntp
then,edit file
sudo nano /etc/ntp.conf
add below:
server ntp.ubuntu.com server pool.ntp.org
restart
sudo service ntp stop sudo service ntp start
Check server time and set timezone:
sudo dpkg-reconfigure tzdata
will show:
Current default time zone: 'Asia/Hong_Kong' Local time is now: Wed Feb 22 20:16:02 HKT 2017. Universal Time is now: Wed Feb 22 12:16:02 UTC 2017.
df -h /path/xxx du -sh xxxx.file #list file maximun size du -lh --max-depth=1 --block-size=M | sort -nr
*rename mv old.file new file *if move file to some directory mv /path/a.file /target/a.file *copy cp -r /path/folder/xxx /target/folder/xxx *Recursive, Non-Overwriting File Copy sudo cp -vnpr /xxx/* /yyy xxx = source yyy = destination v = verbose n = no clobber (no overwrite) p = preserve permissions r = recursive
reference here
*speedtest wget -O speedtest-cli-newest https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py sudo chmod +x speedtest-cli-newest sudo ./speedtest-cli-newest
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LC_MESSAGES = "zh_CN.UTF-8",
LANG = "zh_CN.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Then exec:
sudo apt-get install localepurge
Choose en_US.UTF-8,if want change again and print it to check:
sudo dpkg-reconfigure localepurge sudo locale-gen en_US.UTF-8 export LANGUAGE=en_US.UTF-8 export LANG=en_US.UTF-8 export LC_ALL=en_US.UTF-8 locale-gen en_US.UTF-8 dpkg-reconfigure locales
Or mapping local locate to server like below:
LC_ALL=en_US.UTF-8 ssh name@host
reference here
Use the --remove flag, similar to how the PPA was added:
sudo add-apt-repository --remove ppa:whatever/ppa
As a safer alternative, you can install ppa-purge:
sudo apt-get install ppa-purge
And then remove the PPA, downgrading gracefully packages it provided to packages provided by official repositories:
sudo ppa-purge ppa_name
Note that this will uninstall packages provided by the PPA, but not those provided by the official repositories. If you want to remove them, you should tell it to apt:
sudo apt-get purge package_name
You can also remove PPAs by deleting the .list files from /etc/apt/sources.list.d directory.
*service service --status-all sudo service xxxx stop sudo apt-get remove xxx sudo apt-get --purge remove xxx *port sudo netstat -tunap | grep LISTEN sudo kill xxxx
# cat /proc/sys/vm/swappiness
# 60
it means the memory is over 40(100-60) then will use the swap,
but it will make the disk I/O frequently,
suggest to change to over 90 then we use swap
# sudo nano /etc/sysctl.conf
---
vm.swappiness = 10
---
# sudo sysctl -p
1.check swap:
sudo swapon -s
and:
free -m
2.create what you want memory for swap
sudo fallocate -l 4G /swapfile
3.check swapfile
ls -lh /swapfile
4.enable swapfile
sudo chmod 600 /swapfile
5.check again
ls -lh /swapfile
6.next setup
sudo mkswap /swapfile
sudo swapon /swapfile
7.check it
sudo swapon -s
free -m
8.make it permanent
sudo nano /etc/fstab
add bottom:
/swapfile none swap sw 0 0
sudo apt-get install slurm
slurm -s -i eth0
$ fdisk -l
root@abcd:~# fdisk -l
Disk /dev/vda: 40 GiB, 42949672960 bytes, 83886080 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x6c740fc2
Device Boot Start End Sectors Size Id Type
/dev/vda1 * 2048 83886046 83883999 40G 83 Linux
Disk /dev/vdb: 40 GiB, 42949672960 bytes, 83886080 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
$ fdisk /dev/vdb
root@abcd:~# fdisk /dev/vdb
Welcome to fdisk (util-linux 2.31.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table.
Created a new DOS disklabel with disk identifier 0xaa3faf38.
Command (m for help): n ->Here
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p ->Here
Partition number (1-4, default 1): 1
First sector (2048-xxx, default 2048): ->click 'enter;
Last sector, +sectors or +size{K,M,G,T,P} (2048-xxx, default xxx): ->click 'enter;
Created a new partition 1 of type 'Linux' and of size 40 GiB.
Command (m for help): wq ->Here
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.
$ fdisk -l
$ mkfs.ext3 /dev/vdb1
$ mkdir /data_drive_0
$ echo '/dev/vdb1 /data_drive_0 ext3 defaults 0 0' >> /etc/fstab
$ mount -a
$ df -h
-> /dev/vdb1 39G 73M 39G 1% /data_drive_0
ps auxf > `date +\%Y\%m\%d\%H\%M\%S`.csv
php.ini, upload size
max_execution_time = 5000
max_input_time = 5000
memory_limit = 1000M
post_max_size = 750M
upload_max_filesize = 750M
phpmyadmin/libraries/config.default.php, timeout limit
$cfg['ExecTimeLimit'] = 0;
ref:
https://arstech.net/resize-linux-partition-command-line/
https://community.spiceworks.com/topic/2325763-how-can-i-make-ubuntu-vg-ubuntu-lv-consume-the-entire-disk-space-available
1.type: p
2.type: d
3.remove /dev/sda3 by type 3
4.type: n
5.add new /dev/sda3 by type 3
6.type default enter for First sector,Last sector
7.type: w
8.sudo reboot
9.sudo pvresize /dev/sda3
10.sudo lvresize -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
11.sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
12.sudo reboot