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Below is a list of commands that I use all the time & tend to forget.
Below is a list of commands that I use all the time & tend to forget.
===Generic Linux===
===Generic Linux===
COMMAND NAME DESCRIPTION
{| class="wikitable"
|-
! COMMAND NAME !! DESCRIPTION
|-
| df -h || shows disk usage in human readable form
|-
| man <commandname> || shows more info about a command
|-
| uname -a || kernel release version
|-
| /usr/sbin/smbd -V || samba version
|-
| /usr/sbin/httpd -v || apache version
|-
| mysql -v || mysql version
|-
| php -v || php version
|-
| mv || moves or renames a file
|-
| cp || copies or backup a file
|-
| rm || removes or deletes a file
|-
| ps -aux|grep <process> || outputs processes running <process>
|-
| ps -AH || report process status
|-
| top || shows processes
|-
| top -i || shows only active processes
|-
| htop || shows processes (more versatile than top)
|-
| iptraf || shows network info
|-
| mc -d || show midnight commander (cli file browser) to navigate through system easily
|-
| cat /proc/mdstat || shows software raid
|-
| host -t mx aol.com || shows the mx records for aol.com
|-
| net groupmap list || shows samba mappings to nt groups
|-
| telinit 1 || changes to single user mode
|-
| ifconfig || shows detailed info on ethernet ports
|-
| grep -r "casesensitivesearch" * || finds all documents containing the criteria in a dir
|-
| tail -f /var/log/<LOGFILE> || realtime viewing of your log file
|-
| hdparm -Tt /dev/mdx (where x is 0,1,2,etc) || shows software raid performance
|-
| mdadm --detail /dev/mdx (where x is 0,1,2,etc) || gives raid info
|-
| tar -czvf foo.tar.gz foo || creates a tar/zip file of a directory
|-
| tar -xvzf foo.tar.gz || untar/unzip a tar/zip file
|-
| scp -P <ssh_portnumber> foo.tar.gz <user>@<other_server_ipaddress>:/opt || transfers file to another server in /opt directory
|-
| rsync --progress -te "ssh -p <ssh_portnumber>" foo <other_server_ipaddress>:/opt || transfers file to another server
|-
| sed -i s/foo/fee/g <FILENAMEORPATHTODIR> || replaces foo with fee
|}
COMMAND NAME DESCRIPTION
df -h shows disk usage in human readable form
df -h shows disk usage in human readable form
man <commandname> shows more info about a command
man <commandname> shows more info about a command
