Bash#!/bin/env bash | the shebang | ./ file-name.sh | how to run a bash script | X="hello" | set variables | $X | use the variable | exit code | 1 for false, 0 for true | [ ] | shorthand for test | [[ ]] | better shorthand for test, handles spaces better | if [[ ]]; then; fi | basic if-then-exit statement | if [[ ]]; then; else; fi | basic if-then-else | if [[ ]]; then; elif [[ ]]; then; else; fi | basic if-elif | $? | exit code of last run command | $1, $2 … $9 | argument 1, arg 2, ... | env | see all variables already set | __ -eq __ | check if things are equal | bash -x ____ | debugger | for __ in __ ; do; commands; done | basic for loop, ; indicates new line | while true; do; commands; done | while loop | until true; do; commands; done | until loop | break | exit a loop |
Ownershipchown/chgrp [owner] [file] | change owner/group | chmod [u,g,o]+[permission] [file] | add permissions | chmod [u,g,o]-[permission] [file] | remove permission | [u, g, o] | user, group, other | [permission] | read (r), write (w), execute (x) | 7 | read, write and execute permissions | 6 | read and write permissions | 5 | read and execute permissions | 4 | read permissions | 3 | write and execute permissions | 2 | write permissions | 1 | execute permissions | 0 | no permissions |
How We Set Up Sambasudo dnf install samba | sudo nano /etc/samba/smb.conf | add gloabals | map archive = no | map hidden = no | map read only = no | map system = no | store dos attributes = yes | sudo firewall-cmd --add-service=samba | open the firewall | sudo systemctl start smb.service | sudo systemctl start nmb.service | sudo systemctl enable smb.service | sudo systemctl enable nmb.service | sudo smbpasswd -a [user] | add the user and give password for samba | sudo setsebool -P samba_export_all_rw 1 | need this to let samba run because of a se fedora setting |
| | NetworkingTCP/IP | Transmission Control Protocol/Internet Protocol | ping [web address] | send packets to web address to test connection and speed | ping -s [number] [address] | change packet size sent | traceroute [web address] | shows route packets take when being sent | firewall-cmd --remove-port=[port #]/[port type] | take down firewall for specified port | firewall-cmd --add-port=[port #]/[port type] | put up firewall for specified port | firewall-cmd --add-service=[service] | some services are recognized by firewall command, use this to let them work |
Secure Shellssh [name]@[system name] | using the secure shell | scp [dir]/[file] [name]@[system name]: | copy from local to other system | scp [name]@[system name]:[dir]/[file] . | copy from other system to local |
Common Commandssudo !! | run previous command as sudo | man [command] | for manpages (give info about command) | mkdir | make directory | rmdir | remove directory | cp -r [source] [destination] | copy file recursively | which [filename] | gives location of file | less | read files and able to scroll through, better than 'more' | grep | search text | cat [filename] | shows content of file | head | shows beginning of file | tail | shows end of file | find . -name *.[pP][dD][fF] | find file, use -iname for case-insensitive | history | give a list of previously entered commands | ![line #] | (use this with history) run the command from the history on given line | history | grep [word] | search history for commands including the word | script | record output from entire session | yes "string" | repeat string until manually stopped | cal | ascii calendar | date | gives current date | ^this^that | run previous command replacing "this" with "that" | uptime | show system uptime | whoami | display current user name |
| | DNF**dnf ____ [package name] | ____ can be filled with the words below | update (or upgrade) | update a package | install | install a package | remove | remove a package |
Systemctlsystemctl daemon-reload | Reload systemd manager configuration | journalctl [service name] | check the logs of a servide | systemctl ____ [service name] | ____ can be filled with the words below | start | start a system service | stop | stop a system service | status | check the status of a service | enable | let service start on boot | disable | make it so service does not start on boot |
Other Info* | any character any number of times | ? | any character one time | [cC] | one of these characters | /etc/skel | Sample startup files you can place in home directories for new users | [command] | [command] | piping | $ | regular user | # | root user | ~ | home directory | nano and vi | text editors | & | run in background | ctrl+z | suspend process running | ctrl+c | kill process running | ctrl+s | stop output to terminal | ctrl+q | return from ctrl+s state | ctrl+a | go to start of a line | ctrl+e | go to end of a line | ctrl+k | cut from cursor to end of line |
Gitgit clone /path/to/repository | create copy of git repository | git add filename | add file to git repository | git commit -am "message" | send the changes to git repository | git push | makes the changes to git repository |
Download/Extractwget [url for file] | download file | tar -xzf [file] | extract tar file |
Directories of Note/ | root directory | /bin | contains Unix commands | /boot | contains files needed to boot the system | /dev | device files | /etc | contains most configuration files | /etc/passwd | contains user information (name, password, id, ...) | /etc/skel | sample files for making a new home directory | /home | home folder for user | /lib | contains files for /bin and /sbin | /tmp | location of temporary files for the system |
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