-bash$ history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head
List of commands you use most often
-bash$ ssh -X user@host
ssh remote login with X11 forwarding
Execute a command at a given time-bash$ strace -ff -e trace=write -e write=1,2 -p SOME_PIDintercept stdout/stderr of another process-bash$ strace -p PIDprint stack trace for process PID-bash$ ls -l /proc/PID/fdlist the file handles that process PID has open.-bash$ Ctrl + z -bash$ bg -bash$ disown -h [job-spec]pause already running process, put into background, and detach.-bash$ top - u userlist running processes for user. -bash$ echo "ls -l" | at 1800
-bash$ man ascii
quick access to the ascii table
-bash$ !!:gs/foo/bar
Runs previous command replacing foo by bar every time that foo appears
-bash$ curl ifconfig.me
get your external ip address
-bash$ sshfs name@server:/path/to/folder /path/to/mount/point
Mount folder/filesystem through SSH
-bash$ ctrl-l
clear the terminal screen
-bash$ (cd /tmp && ls)
Jump to a directory, execute a command and jump back to current dir
-bash$ du -h --max-depth=1 | sort -n
List the size (in human readable form) of all sub folders from the current location, sorted by size.
-bash$ disown -a && exit
Close shell keeping all subprocess running
-bash$ ps aux | sort -nk +4 | tail
Display the top ten running processes - sorted by memory usage
Display a block of text with AWK.-bash$ find . -name "*.[py]" -exec grep -i -H "search pattern" {} \;Search recursively to find a word or phrase in certain file types, such as Python code.-H tells grep to print the filename.-i to match the case exactly.-bash$ awk '/start_pattern/,/stop_pattern/' file.txt
-bash$ grep -A # pattern file.txt"
to see a specific number of lines following your pattern
-bash$ grep -n --color pattern * -r
-bash$ lsof -i
Watch Network Service Activity in Real-time
-bash$ some_very_long_and_complex_command # label
Using the above trick it's possible to label your commands and access them easily by pressing ^R and typing the label
-bash$ lsof -P -i -n
Show apps that use internet connection at the moment.
-bash$ mv filename.{old,new}
quickly rename a file
-bash$ rm !(*.foo|*.bar|*.baz)
Delete all files in a folder that don't match a certain file extension
-bash$ wget -qO - "http://www.tarball.com/tarball.gz" | tar zxvf -
Extract tarball from internet without local saving
-bash$ cat /etc/issue
Display which distro is installed
-bash$ man hier
Show File System Hierarchy
-bash$ sudo dd if=/dev/mem | cat | strings
this command will show you all the string (plain text) values in ram
-bash$ ls -R | grep ":$" | sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/ /' -e 's/-/|/'
Graphical tree of sub-directories
-bash$ mkdir -p a/long/directory/path
Make directory including intermediate directories
-bash$ sed -n '10,20p'
Print all the lines between 10 and 20 of a file
-bash$ pv sourcefile > destfile
Copy a file using pv and watch its progress
-bash$ rename 'y/ /_/' *
replace spaces in filenames with underscores
-bash$ vim scp://username@host//path/to/somefile
Edit a file on a remote host using vim
-bash$ du -s * | sort -n | tail
Get the 10 biggest files/folders for the current directory
-bash$ mkdir /home/foo/doc/bar && cd $_
mkdir & cd into it as single command
-bash$ chmod --reference file1 file2
Makes the permissions of file2 the same as file1
-bash$ sed -n 5p
To print a specific line from a file
-bash$ tar -tf | xargs rm -r
Remove all files previously extracted from a tar(.gz) file.
-bash$ ls -d */
list directory entries instead of contents, and do not dereference symbolic links
-bash$ ps awwfux | less -S
Show a 4-way scrollable process tree with full details.
-bash$ find . -type d -empty -delete
Recursively remove all empty directories
-bash$ leave +15 ; leave 1855
set an alarm at for a particular time
-bash$ grep ^Dirty /proc/meminfo
Find out how much data is waiting to be written to disk
-bash$ mkdir -p work/{d1,d2}/{src,bin,bak}
make directory tree
-bash$ cp file.txt{,.bak}
Create a quick back-up copy of a file
-bash$ echo ${SSH_CLIENT%% *}
Get the IP of the host your coming from when logged in remotely
-bash$ showkey -a
Quick access to ASCII code of a key
-bash$ history -d
delete a line from your shell history
-bash$ find ./ -type f -exec chmod 644 {} \;
Recursively change permissions on files, leave directories alone.
-bash$ alias dush="du -sm *|sort -n|tail"
easily find megabyte eating files or directories. dush for the above output. dush -n 3 for only the 3 biggest files
-bash$ :mksession!
Save your sessions in vim to resume later
-bash-3.2$ ./myapp &> log.txt & disown -h ; tail -f log.txt
Run background process. Redirect stdout and stderr to log.txt, disown the process, and tail the log file.
-bash-3.2$ tar -zxvf data.tar.gz
where the options zxvf are:
-z : Uncompress the resulting archive with gzip command. -x : Extract to disk from the archive. -v : Produce verbose output i.e. show progress and file names while extracting files. -f data.tar.gz : Read the archive from the specified file called data.tar.gz.
-bash-3.2$ ls -lhs
List files by size, with option l for a long listing format, h for human readable file size, and s to indicate sort by size.
-bash-3.2$ ls -lSr
To list in reverse order.
-bash-3.2$ wc -l *
Count the number of rows in each file in the current directory.
-bash-3.2$ ls -1 targetdir | wc -l
Count the number of files in the current directory
-bash-3.2$ top
List running processes. Press 1 to list cpus.
-bash-3.2$ find /home/me | grep foo.c
Locate file foo.c
-bash-3.2$ netstat -tlnp
Lists all listening ports together with the PID of the associated process
-bash-3.2$ mrt HOSTNAME
Better than traceroute and ping combined. Investigates the network connection between the host mtr runs on and HOSTNAME.
-bash-3.2$ > file.txt
flush the contents of a file without deleting it
-bash-3.2$ Ctrl-r
Allows you to reverse search through your command history.
-bash-3.2$ du -skh .
Outputs the total size of files and directories within the current directory?
-bash-3.2$ df -kh .
Outputs the used and available space for the current drive.
No comments:
Post a Comment