Học Linux

Học Linux

1/ Chuyển thư mục nhanh:

Set CDPATH

Export CDPATH=/etc:/var:$ORACLE_HOME

Chỉ cần dùng lệnh cd vào thu mục con mà ko cần chỉ dõ thư mục cha

Cd mail

Cd  httpd

Cd named

The path set in .bash_profile

2/ Long directory

Alias ..=”cd ..”

Alias ..2=”cd ../..”

Alias ..3=”cd ../../..”

Alias ..4=”cd ../../../..”

Alias ..5=”cd ../../../../..”

# cd /tmp/very/long/directory/structure/that/is/too/deep

# ..4

3/ Mkdir and cd

Make a directory then cd in that directory

#vi .bash_profile

function mkdircd () { mkdir -p "$@" && eval cd "\"\$$#\"";

}

# mkdircd /tmp/subdir1/subdir2/subdir3

4/ toggle between directories

# cd /tmp/very/long/directory/structure/that/is/too/deep

# cd /tmp/subdir1/subdir2/subdir3

# cd -

# pwd

/tmp/very/long/directory/structure/that/is/too/deep

# cd -

# pwd

/tmp/subdir1/subdir2/subdir3

# cd -# pwd

/tmp/very/long/directory/structure/that/is/too/deep

5/ Manipulate directory stack

Dirs: display the directory stack

Pushd: push directory into the stack

Popd: pop directory from the stack and cd to it

# cd /tmp/dir1

# pushd .

# cd /tmp/dir2

# pushd .

# cd /tmp/dir3

# pushd .

# cd /tmp/dir4

# pushd .

# dirs

/tmp/dir4 /tmp/dir4 /tmp/dir3 /tmp/dir2 /tmp/dir1

# popd

# pwd

/tmp/dir3

# popd

# pwd

/tmp/dir1

6/ grep

Grep –v (except)

Grep –I (ignore case not case)

Grep –c (count the line matching)

Grep –r (find in all subdirectory)

Grep “^Nov” (find “Nov” in beginning  of line)

Grep “terminating.$” (find in ending of the line)

Grep –c “^$” (count of empty lines)

7/ find command