Practical shell command memo

Opening Remarks: here we will record some common bash commands, for example, memo and hope to help others solve some problems.

1. Check whether the file exists

if [ -f ./foo.txt ]then    echo the file existsfi

2. Check whether the directory exists

if [ -d ./test1 ]thenecho the directory existsfi

3. Make the highlight function always exist

androidyue@ubuntu:~/Desktop$ ls | grep s --color=always | more

4. Use curl to batch download FTP resources

curl -u user:password 'ftp://10.0.1.5/archive/photo/IMG_[8763-9147].JPG' -O

5. Execute the program in the background and add & after the program. Note that there is a space between the two.

androidyue@ubuntu:~/Desktop$ start_eclipse.sh &[1] 3749

6. Get File Information

androidyue@ubuntu:~/Pictures/coding$ file flyweight.png flyweight.png: PNG image data, 723 x 311, 8-bit/color RGB, non-interlaced

7. Make good use of Alias

Use an alias to quickly open common paths, which is simple and efficient. Method: Edit ~ /. Add the following settings to bashrc:

#quick Accessesalias pydir='cd /home/androidyue/osc_git/py_works/'alias shdir='cd /home/androidyue/osc_git/shell_works/'

Save

source ~/.bashrc