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less
|
Read a file
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less /opt/FortiEDR/webapp/logs/webapp.log
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|
tail -f
|
Read a file in LIVE
|
tail -f /opt/FortiEDR/webapp/logs/webapp.log
|
|
ps aux
|
List all running processes and info about them (including PID, path, etc.)
|
|
|
grep
|
Search for text string in a file
|
grep ERROR* /opt/FortiEDR/webapp/logs/webapp.log
|
|
grep
|
Search for a text string in a piped stream
|
ps aux | grep enSilo
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| |
|
|
|
-i
|
Case-insensitive (Use it to search for enSilo and ENSILO and ensilo)
|
ps aux | grep -i ensilo
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|
pgrep
|
Get PID of a process by its name
|
pgrep -xf enSiloCollector (used on macOS to find the collector PID)
(xf means that it will find exactly the process name and not other similar processes, for instance: enSiloCollector --status)
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|
touch
|
Create a file
|
touch new.txt
It can be anything, from an empty txt file to an empty zip file.
|
|
mv
|
Move a file
|
mv a.sh new_folder/a.sh
It takes the two arguments, just like the cp command.
|
|
mv
|
Rename a file
|
mv a.sh b.sh
|
|
cp
|
Copy a file
|
cp a.sh new_folder/a_copy.sh
It takes two arguments: The first is the location of the file to be copied, the second is where to copy.
|
|
rm
|
Remove a file
|
rm a.sh
rm -R new_folder (r = recursive, remove folder and all files in that folder)
rm -fr new_folder (f = force remove)
|
|
sudo
|
Run a command as a root user (administrator)
|
sudo chmod 777
|
|
sudo su
|
Enter sudo mode
|
sudo su -
|
|
df
|
See all storage devices and how much disk space is consumed
|
df -h
|
|
mount
|
Mount a share drive (SMB for example)
|
As a registered user: mount -t cifs -o user=<username> //ens-fs01/qa /mnt/share
As a guest: mount -t cifs //ens-fs01/qa /mnt/share
(requires package cifs-utils)
Tutorial: https://www.serverlab.ca/tutorials/linux/storage-file-systems-linux/mounting-smbcifs-shares-onto-cen...
|
|
umount
|
Unmount (eject) a share drive (SMB for example)
|
umount /mnt/share/
|
|
mkdir
|
Make a new directory
|
mkdir new_folder
|
|
rmdir
|
Remove a directory
|
rmdir new_folder
rmdir can only be used to delete an empty directory. To delete a directory containing files, use rm.
|
|
pwd
|
Print current directory
|
pwd
|
|
chmod
|
Change permissions of a file
|
chmod +x [file]
|
|
cd
|
Go to folder
|
cd /root/folder
|
|
ls
|
List all files in the current folder (or a specified folder)
|
ls /root/folder
|
|
locate
|
Locate a file in Linux system
|
locate hello
List of all the files in the Linux system containing the word "hello"
|
|
-i
|
Case insensitive
|
locate -i hello
|
|
*
|
If two words are remembered, separate them using an asterisk (*)
|
locate -i *hello*this
Locate a file containing the words "hello" and "this"
|
|
ifconfig
|
Check the machine's internal IP
|
|
|
ip a
|
Check the machine's internal IP (alternative to ifconfig)
|
|
|
vi
|
Edit a file
|
vi /opt/ensilo/webapp/application.properties
|
|
:q
|
Quit the file editor
|
|
|
:wq
|
Save the changes, and quit the file editor
|
|
|
:q!
|
Quit the file editor and discard the changes
|
|
|
kill
|
Kill a process (by process ID)
|
kill -9 [PID]
|
|
systemctl status
|
Check status of a service
|
systemctl status FortiEDR
|
|
./
|
Relative path (run a file in current folder)
|
./script.sh (execute)
|
|
/
|
Full path
|
/root/folder/script.sh (execute – full path)
|
|
find /
|
Search for a string within the file editor
|
View a file: less [file]
Then search for errors: /ERROR
|
|
lsof
|
List all opened files on the file system
|
For example, To find all open files in folder /opt:
lsof | grep /opt
|
|
rpm -qa
|
Get a list of all installed packages (CentOS)
|
rpm -qa | grep -i FortiEDR
|
|
yum install
|
Install a package
(CentOS)
|
yum install [package]
|
|
yum remove
|
Remove a package (CentOS)
|
yum remove [package]
|
