複数のディレクトリにまたがる、GZファイルを一括でzcatする

結論から書くと、以下のコマンドでいけます。

find ./ -name "*.gz" -exec zcat {} +
もしくは
find ./ -name "*.gz" | xargs zcat

xargsのほうがなんとなく良さそう。

こういう階層構造のときに利用できます。

$ tree .
.
├── 01
│   ├── 999999999999__app.hoge-hoge-alb._20250601T0000Z_99.88.77.66_31xyjfrv.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250601T0020Z_99.88.77.66_2vbnoiva.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250601T0030Z_1.2.3.4_3qlhjkt2.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250601T0035Z_99.88.77.66_2tu71fv6.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250601T0040Z_1.2.3.4_2g2agy2d.log.gz
│   └── 999999999999__app.hoge-hoge-alb._20250601T2350Z_1.2.3.4_3q5syo7x.log.gz
├── 02
│   ├── 999999999999__app.hoge-hoge-alb._20250602T0025Z_1.2.3.4_2bgrhg8v.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250602T0105Z_55.44.33.11_1gx93fvf.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250602T0110Z_1.2.3.4_1p6c19sx.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250602T2315Z_55.44.33.11_3nskwjbq.log.gz
│   └── 999999999999__app.hoge-hoge-alb._20250602T2335Z_1.2.3.4_4bu0i2xm.log.gz
├── 03
│   ├── 999999999999__app.hoge-hoge-alb._20250603T0010Z_1.2.3.4_30hzkuem.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250603T0035Z_1.2.3.4_69c8hdp1.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250603T2340Z_1.2.3.4_5pxba6zq.log.gz
│   └── 999999999999__app.hoge-hoge-alb._20250603T2350Z_55.44.33.11_4j8p4h58.log.gz
├── 04
│   ├── 999999999999__app.hoge-hoge-alb._20250604T0000Z_55.44.33.11_3dycvjpr.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250604T0015Z_55.44.33.11_mr07oq1y.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250604T0050Z_1.2.3.4_4pbrzh5o.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250604T2330Z_55.44.33.11_4084h0j5.log.gz
│   └── 999999999999__app.hoge-hoge-alb._20250604T2340Z_55.44.33.11_4jwyi6z4.log.gz
├── 05
│   ├── 999999999999__app.hoge-hoge-alb._20250605T0010Z_99.88.77.66_2y9qq0a3.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250605T0010Z_55.44.33.11_4e1q822k.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250605T0020Z_99.88.77.66_1b5rmtfu.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250605T0025Z_99.88.77.66_1r7tjmta.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250605T0350Z_55.44.33.11_4d7orlit.log.gz
│   ├── 999999999999__app.hoge-hoge-alb._20250605T0355Z_55.44.33.11_4idbf00p.log.gz
└── 16
    ├── 999999999999__app.hoge-hoge-alb._20250616T0010Z_55.66.77.88_4kqwu9cy.log.gz
    ├── 999999999999__app.hoge-hoge-alb._20250616T0010Z_111.222.333.444_20qq7n9q.log.gz
    ├── 999999999999__app.hoge-hoge-alb._20250616T0030Z_55.66.77.88_4kf308fg.log.gz
    ├── 999999999999__app.hoge-hoge-alb._20250616T0050Z_55.66.77.88_6a0m7psi.log.gz
    ├── 999999999999__app.hoge-hoge-alb._20250616T0455Z_55.66.77.88_3kz8r60b.log.gz
    ├── 999999999999__app.hoge-hoge-alb._20250616T0500Z_55.66.77.88_2i4bb4jx.log.gz
    ├── 999999999999__app.hoge-hoge-alb._20250616T0500Z_111.222.333.444_znd2ay5y.log.gz
    ├── 999999999999__app.hoge-hoge-alb._20250616T0510Z_55.66.77.88_4zlz6pet.log.gz
    ├── 999999999999__app.hoge-hoge-alb._20250616T0515Z_111.222.333.444_5ckmgw0p.log.gz
    └── 999999999999__app.hoge-hoge-alb._20250616T0520Z_111.222.333.444_17no72t3.log.gz

find, zcat, xargsは今後もずっと使いそうなコマンドです。