How to display the file size in megabytes with ls in linux/unix
Display the file size in megabytes, which can facilitate us to browse the file storage size. Syntax: ls -lh , to display the file size...
How to list hidden files and folders in linux/unix
In linux/unix, when it comes to listing files and folders, everyone will think of the ls command. Yes, there are many options for the ls...
List directories recursively in linux/unix
Recursive listing of directories can help us begin to understand the current directory structure. In linux/unix, we can use any of the following commands to...
mkdir recursively create directories in linux/unix
Creating directories recursively can help us greatly improve efficiency during development. In linux/unix, we can use the mkdir command to recursively create directories and subdirectories...
rm delete recursively in linux/unix
How to use the rm command to delete files and directories recursively in linux/unix. Syntax Examples In the following example, recursively delete data folder: First...
How to show the currently logged in user in linux/unix
Show the current logged-in users is a must in linux/unix, which can help us determine which users are using the terminal window to log in...
awk tutorial: awk multiple conditions
Awk supports if else conditions judgment, and multiple conditions operations with && (and) or || (or) can be used....
sed tutorial: sed replace
Sed replace, you can use the sed function: s, replace the text in the file. syntax: ➜ ~ sed 's/regexp/replacement/' file...
sed tutorial: sed insert line before match
Sed insert a line before match, you can use the sed function: i, add a new line before the matched string. syntax: sed '/option/i...
sed tutorial: sed add line after match
sed add line after match, you use sed function: a , to add a new line after the matched string. syntax: sed '/option/a newLine'...
lsof command tutorial in linux/unix with examples and use cases
The lsof command can not only view the files and directories opened by the process, but also view the socket-related information such as the port...
How to recover deleted files in Linux
Linux recover deleted files, we can use the debugfs command. It can be used to examine and change the state of an ext2, ext3,...
mkdir no such file or directory in linux/unix
mkdir no such file or directory - This error is reported because you created a multi-level directory and the intermediate directory does not exist. We...
mkdir if not exists in linux/unix
mkdir creates a directory if it does not exist, we can use the mkdir -p option. syntax: mkdir -p foo/bar/baz, will create directories foo, foo/bar,...
How to use awk concatenate string in linux/unix
Awk concatenated strings, you can use awk OFS variables, or you can use strings directly. syntax: awk'BEING {s1="string1";s2="string2";OFS="delimiter";print s1,s2;}'...