Updated: 20 April 2023
Open file scrolled to the end:
less +G app.log
+
run a command when the file is openedG
jump to end
Freelance software engineer United Kingdom
Updated: 20 April 2023
Open file scrolled to the end:
less +G app.log
+
run a command when the file is openedG
jump to endUpdated: 06 July 2024
Display the current time
date
Convert a timestamp to human readable date
date -d @641288145
Print Coordinated Universal Time
date --utc
Current Unix epoch time
date +%s
Updated: 07 February 2023
Report file system disk space usage.
Show free space on usb or external hard disk
tom@laptop:/media/tom$ df -kh *
Updated: 10 September 2022
Use No Hangup to kick-off a long running task, then disconnect
nohup bin/behat --out results.txt features &
Updated: 13 January 2023
Find all occurrences of foo in directories and files recursively, from the current directory
grep -irn --exclude-dir=dir --text foo * -i: case insensitive -r: recursive but don't follow symlinks -n: show line number --text: treat binary files as text
Interpret PATTERNS as --fixed-strings
, not regular expressions
grep -F './dir/dir2' file.txt
Updated: 14 October 2024
Show size of directories in current directory
du -h --max-depth=1 . | sort -n
Updated: 21 November 2023
Write output to file
instead of stdout
curl http://some.url --output <file>
Basic HTTP server authorisation
curl -u user:pass http://some.url
# or
curl http://user:pass@some.url
Make the operation more talkative
curl --verbose https://www.google.com
By default, every secure connection curl makes is verified to be secure before the transfer takes place. The --insecure
option makes curl skip the verification step and proceed without checking.
curl --insecure https://www.example.com
Follow redirects
curl --location https://www.i-have-moved.com
Updated: 03 December 2022
Change user own password on Ubuntu
passwd
Updated: 04 December 2024
Find symbolic links, recursively down from the current directory
find . -type l
Find files in directory /tmp
larger than 100MB
sudo find /tmp -type f -size +100M
Find directories with either foo or bar in their name
find . -type d \( -iname '*foo*' -or -iname '*bar*' \) | sort
Find files or directories with either lvim or lunarvim in their name
find . \( -iname '*lvim*' -or -iname '*lunarvim*' \)
Find files modified within the last 6hrs i.e. 0.25 of 1 day
find /home/chris -type f -mtime -0.25
Find files where name (case insensitive) matches ‘*.exe’
find ~/.nuget/packages -iname "*.exe"
Find directories where name starts with ‘site’
find . -type d -name 'site*'
Find any of the named files (risky, test first)
find this-dir -type f \( -name "foo" -o -name "bar" -o -name "log" \)
Find all files not in the git directory
find . -type f -not -path "./.git/*"
Find, but exclude multiple directories
find ~ -iname '*nvim*' ! -path '/path/one/*' ! -path '/path/two/*' ! -path '/path/three/*'
Find directories with name including let but search no more that 2 levels down
find -maxdepth 2 -type d -iname '*let*'
find
uses ;
or +
to terminate the -exec
command. Therefore \;
must be used because ;
is one of the operators (also &&
or ||
) which separates shell commands.
Find files by text in the file.
find . -type f -name "*.java" -exec grep -il string {} \;
-i
: ignore case
-l
: show filenames, not the match.
Updated: 26 March 2024
cp – copy files and directories.
Copy the entire contents of a directory. Using a dot at the end of the source directory indicates that everything within the directory should be copied, including hidden files
cp -a /tmp/wordpress/. /var/www/wordpress
Copy and rename a file
cp program3.cpp homework6.cpp
Copy file into a folder
cp chris-taylor-cv.pdf marketing/
cp image.jpg folder/sameImageNewName.jpg
Preserve the file modify
time, when copying
cp --preserve=timestamps ~/.tmux.conf ~/my-dot-files/